A comprehensive index of 1071 database management systems catalogued by Carnegie Mellon University's Database of Databases.
Auto-generated by dbdb-index. Data sourced from dbdb.io.
The database landscape spans 61 years of innovation (from 1964 to 2025), across 57 countries. The most popular data model is Relational (362 systems), followed by Key/Value (222) and Document / XML (195). Open source projects (682) outnumber commercial ones (538) by 1.3x. C++ is the most common implementation language (196 systems), with Java (152) and C (121) close behind.
Relational ████████████████████████████████████████ 362
Key/Value █████████████████████████ 222
Document / XML ██████████████████████ 195
Graph ████████ 71
Object-Oriented ███████ 59
Object-Relational ████ 33
Vector ███ 29
Column Family / Wide-Column ███ 25
Triplestore / RDF ███ 24
Array / Matrix ██ 18
Network █ 9
Hierarchical █ 5
Entity-Relationship █ 4
Multi-Value █ 4
Entity-Attribute-Value █ 2
Database systems through the decades. The explosion of new projects in the 2010s reflects the rise of NoSQL, NewSQL, and cloud-native databases.
1960s █ 4
1970s ██ 20
1980s ████ 41
1990s ███████ 77
2000s ████████████████ 185
2010s ████████████████████████████████████████ 457
2020s ███████████████████ 222
United States of America ████████████████████████████████████████ 500
China ███████ 87
Germany ██████ 73
United Kingdom █████ 60
Canada ███ 33
France ██ 31
Russia ██ 28
Japan ██ 19
India █ 18
Netherlands █ 17
Sweden █ 17
Australia █ 15
Israel █ 15
Italy █ 13
Switzerland █ 13
C++ ████████████████████████████████████████ 196
Java ███████████████████████████████ 152
C █████████████████████████ 121
Go █████████████████████ 102
Rust ████████████████ 76
Python ██████████ 47
C# ███████ 35
JavaScript ██████ 31
Erlang ███ 13
Scala ██ 12
TypeScript ██ 12
Clojure ██ 11
Bash █ 6
Assembly █ 5
Ruby █ 5
Proprietary ████████████████████████████████████████ 296
Apache v2 ████████████████████████████████████ 268
MIT ███████████████████ 137
BSD ███████ 54
AGPL v3 ██████ 46
GPL v2 ██████ 46
GPL v3 █████ 35
Mozilla Public License ██ 16
LGPL v2 ██ 12
Business Source License █ 11
Eclipse Public License █ 9
LGPL v3 █ 9
Open Source ████████████████████████████████████████ 682
Commercial ████████████████████████████████ 538
Hobby ████████ 129
Academic █████ 86
Industrial Research █ 18
Educational █ 8
Internal / Non-Public █ 6
#(5) · A(59) · B(44) · C(80) · D(65) · E(51) · F(40) · G(46) · H(44) · I(32) · J(21) · K(32) · L(38) · M(50) · N(32) · O(34) · P(60) · Q(14) · R(57) · S(116) · T(75) · U(10) · V(34) · W(8) · X(8) · Y(9) · Z(7)
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| /rdb | /rdb is comprised of shell-level programs that read tables from the standard input and write tabl... | Relational | United States of America | 1984 | Commercial | Bash | Proprietary |
| 1010data | United States of America | 2000 | Commercial | ||||
| 3store | 3store is an RDF "triple store", written in C and backed by MySQL and Berkeley DB. It is an optim... | Triplestore / RDF | United Kingdom | 2003 | Academic, Open Source | C | GPL v2 |
| 4D | 4D is a relational DBMS that is integrated with an IDE and a proprietary programming language. It... | Relational | France | 1984 | Commercial | Proprietary | |
| 4store | Triplestore / RDF | United Kingdom | 2009 | Open Source | C | GPL v3 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| abhot | abhot ("A Brief History Of Time") is a time-series database management system. It is a fork of Ka... | China | 2017 | Academic, Open Source | Java | Apache v2 | |
| Access | Microsoft Access is a database management system from Microsoft that combines the relational Micr... | Relational | United States of America | 1992 | Commercial | C++ | Proprietary |
| Accumulo | Apache Accumulo is a sorted, distributed key-value store based on Google's Bigtable, HDFS and Apa... | Column Family / Wide-Column | United States of America | 2008 | Open Source | Java | Apache v2 |
| AceBase | AceBase is a document-oriented DBMS that supports pub/sub real-time notifications. It is designed... | Document / XML | Netherlands | 2018 | Hobby, Open Source | TypeScript | MIT |
| AceDB | AceDB ("a C. elegans database") is a biological database for handling genomic data. It was develo... | United Kingdom | 1989 | Academic, Open Source | C | GPL v2, LGPL v2 | |
| ActivePivot | ActivePivot is a distributed, in-memory DBMS designed for HTAP workloads, which supports real-tim... | Relational | France | Commercial | Java | Proprietary | |
| ActorDB | ActorDB is a distributed relational SQL database, which is strongly consistent, massively concurr... | Relational | Slovenia | 2014 | Commercial, Open Source | Erlang | Mozilla Public License |
| Adabas | ADABAS ("adaptable database system") is a database package developed by Software AG for IBM mainf... | Germany | 1971 | Commercial | Proprietary | ||
| Adaptive Server Enterprise | Adaptive Server Enterprise (ASE) (also known as "Sybase DB" or "Sybase ASE") is a relational DBMS... | Relational | United States of America | 1987 | Commercial | C, C++ | Proprietary |
| Advantage Database Server | Sybase Advantage Database Server is a relational DBMS released in the 1990s. | Relational | United States of America | 1993 | Commercial | Proprietary | |
| Aerospike | Aerospike is a distributed key-value DBMS. It is mainly targeted at OLTP workloads with large num... | Key/Value, Document / XML, Vector | United States of America | 2009 | Commercial, Open Source | C | AGPL v3 |
| AgateDB | AgateDB is an embeddable, persistent key-value DBMS written in Rust. It is built by Pingcap as a ... | Key/Value | China | 2019 | Industrial Research, Open Source | Rust | Apache v2 |
| AGEDB | AGEDB is the commercial version of PostgreSQL using the Apache AGE graph API extension. | Graph | Canada | 2019 | Commercial, Open Source | C | Apache v2 |
| AgensGraph | AgensGraph is a multi-model database based on PostgreSQL RDBMS, and supports both relational and ... | Relational, Key/Value, Document / XML, Graph | United States of America | 2013 | Commercial, Open Source | C | Apache v2 |
| Aito | Aito is a cloud-based predictive database, that provides predictive queries as an addition to the... | Finland | 2017 | Commercial | Scala | Proprietary | |
| AKDB | AKDB ("Avtomat Kalasnikova Database") is an educational relational DBMS developed at the Universi... | Relational | Croatia | 2009 | Academic, Educational, Open Source | C | |
| Akiban | Akiban was a MySQL storage engine that performed automatic denormalization of relational tables t... | United States of America | 2009 | Commercial | |||
| Akumuli | Akumuli is a time-series DBMS. | Russia | 2013 | Open Source | C++ | Apache v2 | |
| Akutan | Akutan is a distributed knowledge graph DBMS written in Go. | Triplestore / RDF | United States of America | 2019 | Industrial Research, Open Source | Go | Apache v2 |
| AlaSQL | AlaSQL is a relational DBMS designed to run in web browsers and JavaScript-based application serv... | Relational, Document / XML | Russia | 2014 | Open Source | JavaScript | MIT |
| AlchemyDB | AlchemyDB is a NewSQL RDBMS built on top Redis. | Relational | United States of America | 2010 | Commercial, Open Source | C | AGPL v3 |
| Alenka | Alenka is a GPU-based query execution engine. | Relational | United States of America | 2012 | Open Source | C | Apache v2 |
| Algebraix | United States of America | 2009 | Commercial | Proprietary | |||
| AllegroGraph | AllegroGraph is a database and application framework for building Semantic Web applications. It c... | Triplestore / RDF | United States of America | 2004 | Commercial | Lisp | Proprietary |
| AlloyDB | AlloyDB is a fully-managed database system that is a fork from PostgreSQL created by Google Cloud... | Object-Relational | United States of America | 2022 | Commercial | Proprietary | |
| Altibase | Atibase is a relational open-source database management system that is compatible and interoperab... | Relational | South Korea | 1999 | Commercial | C, C++ | AGPL v3 |
| Amelie | Amelie is an in-memory relational DBMS designed for OLTP workloads. | Relational | Cyprus | 2023 | Hobby, Open Source | C | AGPL v3 |
| Amisa Server | Amisa Server was a NoSQL database-as-a-service. | Document / XML | Canada | 2014 | Commercial | ||
| AncelusDB | AncelusDB is time-series DBMS. | Entity-Relationship | United States of America | 1983 | Commercial | Proprietary | |
| AngstromDB | AngstromDB is a NoSQL key-value DBMS based on LMDB. | Key/Value | France | 2013 | Hobby, Open Source | C | Apache v2 |
| AnnaDB | AnnaDB is an in-memory document-oriented NoSQL DBMS that stores data in proprietary [Typed Simple... | Document / XML | Germany | 2021 | Hobby, Open Source | Rust | Apache v2 |
| AnnDB | AnnDB is a distributed vector DBMS that supports approximate nearest neighbor queries. | Vector | Czechia | 2020 | Commercial, Open Source | Go | Apache v2 |
| AntDB | AntDB is a distributed DBMS forked from PostgreSQL. | Object-Relational | China | Commercial, Open Source | C | Apache v2 | |
| Antidote | AntidoteDB is a geo-replicated key-value DBMS that uses CRDTs to synchronize changes between nodes. | Key/Value | France | 2015 | Academic, Open Source | Erlang | Apache v2 |
| AnuDB | AnuDB is a serverless document-oriented DBMS for C++ applications. | Document / XML | India | 2025 | Hobby, Open Source | C++ | MIT |
| AnzoGraph | AnzoGraph is an in-memory distributed graph DBMS designed for analytics. | Graph | United States of America | 2007 | Commercial | Proprietary | |
| AODBM | AODBM ("append only database manager") is designed in the style of dbm. | United Kingdom | 2011 | Open Source | C | LGPL v3 | |
| Apollo | Apollo is Facebook's document-oriented DBMS announced in 2014. | Document / XML | United States of America | 2014 | Commercial | ||
| Apollo | Apollo is a Windows-based desktop database management system that supports FoxPro files. | United States of America | 1999 | Commercial | Proprietary | ||
| Arakoon | Arakoon was a distributed key-value store with strong consistency guarantees. | Key/Value | Belgium | 2010 | Open Source | Ocaml | Apache v2 |
| ArangoDB | ArangoDB is a multi-model mostly-memory database. It supports key-value, documents, and graphs st... | Key/Value, Document / XML, Graph | Germany | 2011 | Commercial, Open Source | C++ | Apache v2 |
| ArcadeDB | ArcadeDB is a multi-model DBMS created as a fork from OrientDB. | Relational, Key/Value, Document / XML, Graph | United Kingdom | 2021 | Commercial, Open Source | Java | Apache v2 |
| ArcticDB | ArcticDB is an embedded, columnar datastore designed for analytical workloads on time-series data... | Relational | United Kingdom | 2018 | Open Source | C++ | Business Source License |
| Ardb | Ardb is a Redis-compatible NoSQL DBMS that is designed to support multiple storage backends. | Key/Value | China | 2013 | Open Source | C++ | BSD |
| AresDB | AresDB is a GPU-based real-time analytics database with low memory overhead, real-time upserts wi... | Relational | United States of America | 2018 | Open Source | C, C++, Go | Apache v2 |
| Asami | Asami is a graph-oriented DBMS written in Clojure. | Graph | United States of America | 2018 | Hobby, Open Source | Clojure | Eclipse Public License |
| Assassin | Assassin is a decentralized key-value DBMS written in JavaScript. It uses a peer-to-peer protocol... | Key/Value | United States of America | 2020 | Open Source | JavaScript | MIT |
| Aster Data | Aster Data is a relational DBMS designed for OLAP workloads. | Object-Relational | United States of America | 2005 | Commercial | Proprietary | |
| AsterixDB | AsterixDB is a DBMS that is highly parallel and, consequently, highly scalable. It has its own se... | Document / XML | United States of America | 2009 | Academic, Open Source | Java | Apache v2 |
| Atlas | Atlas is a dimensional time series data database management system for near real-time operational... | United States of America | 2014 | Open Source | Scala | ||
| AtomicDB | AtomicDB is an associative database. Compared with relational database, associative model stores ... | Object-Oriented | United States of America | 2011 | Commercial | Proprietary | |
| Aurora | Amazon Aurora is a relational database offered as a service in Amazon's AWS. Based on the open so... | Relational | United States of America | 2014 | Commercial | C | |
| Aurora DSQL | Aurora DSQL is a serverless PostgreSQL-compatible database service at Amazon. | Relational | United States of America | 2023 | Commercial | Proprietary | |
| AverageDB | AverageDB (AvgDB) is a serverless document-oriented DBMS. It is a parody DBMS that does not actua... | Document / XML | United States of America | 2024 | Hobby, Open Source | TypeScript | Apache v2 |
| AvionDB | AvionDB is decentralized document DBMS built on top of IPFS. It uses [OrbitDB]... | Document / XML | India | 2020 | Commercial, Open Source | JavaScript | MIT |
| AwaDB | AwaDB is a vector DBMS written in C++ that supports nearest-neighbor search. | Document / XML, Vector | China | 2023 | Open Source | C++ | Apache v2 |
| Axibase | Axibase is a non-relational, time series DBMS optimized for collecting, storing, and analyzing te... | United States of America | 2004 | Commercial | Proprietary | ||
| Axion | Axion is a relational database system supporting SQL and JDBC written in and for the Java program... | Relational | United States of America | 2002 | Open Source | Java | |
| Azure SQL Database | Microsoft Azure SQL Database is a managed cloud database-as-a-service based. It shares the SQL Se... | Relational | United States of America | 2009 | Commercial | C++ | Proprietary |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| BabuDB | BabuDB is an embedded key-value DBMS based on log-structured merge trees. There are two implement... | Key/Value | Germany | 2008 | Academic, Open Source | C++, Java | |
| BadgerDB | Badger started as a key-value store, so the goal was to use the latest research to build a key-va... | Key/Value | United States of America | 2017 | Open Source | Go | Apache v2 |
| BagelDB | BagelDB is a proprietary hosted vector DBMS designed to support data sharing. | Vector | Canada | 2023 | Commercial | Proprietary | |
| Bagri | Bagri is a document-oriented DBMS designed to run on top of a distributed cache (e.g., Hazelcast,... | Document / XML | Russia | 2014 | Open Source | Java | Apache v2 |
| BaikalDB | BaikalDB is a distributed OLTP database system created by Baidu. | Relational | China | 2018 | Open Source | C++ | Apache v2 |
| BangDB | BangDB is a NoSQL DBMS designed for real-time data processing. The DBMS supports structured, semi... | Key/Value | India | 2015 | Commercial, Open Source | C | BSD |
| BaseX | BaseX is a light-weight XML database management system and XQuery processor. | Document / XML | Germany | 2007 | Academic, Open Source | Java | BSD |
| Basic | Basic is a document-oriented database service. | Document / XML | United States of America | 2023 | Commercial | Proprietary | |
| BASIS | The BASIS DBMS is a relational DBMS that supports SQL. | Relational | United States of America | Commercial | Proprietary | ||
| BayesDB | BayesDB is a probabilistic programming platform that provides built-in non-parametric Bayesian mo... | United States of America | 2015 | Academic, Open Source | Python | Apache v2 | |
| bbolt | bbolt is a fork of the abandoned BoltDB project. The authors are maintaining the sy... | Key/Value | United States of America | 2017 | Open Source | Go | MIT |
| BBoxDB | BBoxDB is a distributed DBMS that supports bounding box queries on multi-dimensional data. | Array / Matrix | Germany | 2015 | Open Source | Java | Apache v2 |
| Beagle SQL | Beagle SQL was an object-relational DBMS from the 1990s. | Relational, Object-Relational | United States of America | 1996 | Open Source | C++ | |
| Bedrock | Bedrock is a distributed relational DBMS built on top of SQLite. It is a distributed relational d... | Relational | United States of America | 2016 | Open Source | C++ | LGPL v3 |
| BergDB | BergDB is an embedded, document-oriented, schemaless, NoSQL DBMS for Java and .NET applications. | Document / XML | Sweden | 2013 | Open Source | Java | AGPL v3 |
| Beringei | Beringei is an embedded in-memory storage engine for time series data developed by Facebook. It w... | Key/Value | United States of America | 2015 | Open Source | C++ | BSD |
| Berkeley DB | BerkeleyDB (sometimes referred to as simply "BDB") is an embedded open-source, database storage l... | Key/Value, Document / XML | United States of America | 1994 | Commercial, Open Source | AGPL v3, Apache v2 | |
| BerylDB | BerylDB is a key-value DBMS that supports storing lists, sets, and maps. It uses RocksDB as its u... | Key/Value | Chile | 2021 | Hobby, Open Source | C++ | BSD |
| BigchainDB | BigchainDB is an open-source blockchain database. It is a NoSQL database that has blockchain prop... | Key/Value, Document / XML | Germany | 2015 | Commercial, Open Source | Python | Apache v2 |
| BigQuery | BigQuery is a cloud-based interactive query service for large datasets. It is built upon Google's... | Document / XML | United States of America | 2010 | Commercial | C++, Java, Python | Proprietary |
| BinaryRage | BinaryRage is an embedded key-value store DBMS written for .NET environments. | Key/Value | Denmark | 2012 | Hobby, Open Source | C# | |
| Bitcask | Bitcask is an embedded key-value DBMS that uses a log-structured storage format. The system inclu... | Key/Value | Australia | 2019 | Open Source | Go | MIT |
| Bitsy | Bitsy is a embeddable in-memory graph database that is compatible with Tinkerpop3. It is based on... | Graph | United States of America | 2013 | Open Source | Java | Apache v2 |
| BitYota | BitYota was a cloud data warehouse relational DBMS. | Relational | United States of America | 2011 | Commercial | Proprietary | |
| BlackRay | BlackRay was a relational DBMS designed to offer performance features commonly associated with se... | Relational | Germany | 2005 | Commercial, Open Source | C++ | GPL v2 |
| Blazegraph | Blazegraph is an open-source graph database system written in Java. Blazegraph is supported for u... | Graph, Triplestore / RDF | United States of America | 2006 | Commercial, Open Source | Java | GPL v2 |
| BlazingSQL | BlazingSQL is a distributed GPU-accelerated SQL engine with data lake integration, where data lak... | Relational | Peru | 2015 | Commercial, Open Source | C++ | Apache v2, Proprietary |
| BlinkDB | BlinkDB is an approximate query engine built on top of Hive and Shark ("Hive on Spark", the forme... | Relational | United States of America | 2012 | Academic, Open Source | Apache v2 | |
| BlobCity | BlobCity is an in-memory relational database that supports both transaction and analytical worklo... | Relational, Document / XML | India | 2015 | Commercial | Proprietary | |
| Blueflood | United States of America | 2013 | Open Source | Java | Apache v2 | ||
| BoJack | BoJack is a single-node key-value store written in Crystal, largely inspired by Redis. | Key/Value | Germany | 2016 | Open Source | Crystal | MIT |
| BoltDB | BoltDB is an embedded ACID key/value database written in Go. It supports MVCC with shadow paging ... | Key/Value | United States of America | 2013 | Open Source | Go | MIT |
| BonsaiDb | BonsaiDb is a key-value store DBMS written in Rust. It can operate as an embedded DBMS and as a s... | Key/Value | United States of America | 2021 | Open Source | Rust | Apache v2, MIT |
| BrightstarDB | BrightstarDB is a RDF DBMS for the .NET platform. | Triplestore / RDF | United Kingdom | 2012 | Open Source | C# | MIT |
| BroDB | BroDB is a parody DBMS where applications interact with the system using a query language as if i... | Relational | India | 2024 | Hobby, Open Source | Go | |
| Brytlyt | Brytlyt is a GPU-accelerated DBMS built on top of Postgres. | Object-Relational | United Kingdom | 2013 | Commercial | C, C++ | Proprietary |
| BTDB | BTDB is an embedded key/value DBMS designed for .NET applications. It also provides an object-ori... | Key/Value, Object-Oriented | Czechia | 2010 | Open Source | C# | MIT |
| BTrDB | BTrDB (Berkeley Tree Database) is a time-series database that uses K-Ary trees to store data. | Relational | United States of America | 2014 | Academic, Open Source | Go | GPL v3 |
| Btrieve | Btrieve is an embedded navigational DBMS engine. | Network | United States of America | 1982 | Commercial | ||
| Bubba | United States of America | 1990 | Academic | ||||
| bugfruit | bugfruit is a embedded key-value DBMS written in Go. | Key/Value | United States of America | 2022 | Hobby, Open Source | Go | BSD |
| BuntDB | BuntDB is an embeddable, in-memory key/value database with custom indexing and geospatial support. | Key/Value | United States of America | 2016 | Open Source | Go | MIT |
| BusTub | BusTub is an educational disk-oriented DBMS used for teaching [database courses](https://15445.co... | Relational | United States of America | 2019 | Academic, Educational, Open Source | C++ | MIT |
| ByConity | ByConity is a cloud-native OLAP DBMS based on Clickhouse. | Relational | China | 2020 | Commercial, Open Source | C++ | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| C-Store | C-Store is a column-oriented DBMS designed for read-optimized OLAP workloads. It adopts a column ... | Relational | United States of America | 2005 | Academic, Open Source | C++ | BSD |
| Cachegrand | Cachegrand is an Redis-compatible key-value DBMS designed for caching. | Key/Value | Switzerland | 2018 | Commercial, Open Source | C | BSD |
| Caché | Caché stores data in multidimensional arrays for storing hierarchically structured data. | Array / Matrix | United States of America | 1997 | Commercial | Proprietary | |
| Calvin | Calvin is a scalable transactional database system that leverages determinism to guarantee active... | Relational | United States of America | 2012 | Academic, Open Source | C++ | |
| CamaDB | CamaDB is an embedded document-oriented DBMS for Node, Electron and browser-based environments. | Document / XML | 2021 | Hobby, Open Source | TypeScript | MIT | |
| CapyDB | CapyDB is a document-oriented DBMS with built-in support for approximate nearest neighbor searche... | Document / XML | United States of America | 2024 | Commercial | Proprietary | |
| CaskDB | CaskDB is an embedded and persistent key-value DBMS. It was built an educational tool for people ... | Key/Value | India | 2022 | Educational, Open Source | Python | MIT |
| Cassandra | Apache Cassandra is a free and open source NoSQL distributed database management system. It provi... | Column Family / Wide-Column, Key/Value | United States of America | 2008 | Open Source | Java | Apache v2 |
| CastleDB | CastleDB is a structured static DBMS platform designed to make it easier for multiple people to c... | Document / XML | France | 2012 | Open Source | Haxe | ISC License |
| Cayley | Cayley is an open-source graph database query engine inspired by the Freebase and Google's Knowle... | Triplestore / RDF | United States of America | 2014 | Open Source | Go | Apache v2 |
| cdb | cdb is a simple package for creating and reading constant (i.e., immutable) databases. | Key/Value | United States of America | Open Source | Public Domain | ||
| Cedalio | Cedalio is a document-oriented blockchain database as a service. | Document / XML | United States of America | 2022 | Commercial | Proprietary | |
| CedarDB | CedarDB is the commercial offering of the academic Umbra relational DBMS. | Germany | 2023 | Commercial | C++ | Proprietary | |
| chaozzDB | chaozzDB is a proof-of-concept embedded, flat-file SQL DBMS written entirely in PHP. | Netherlands | 2008 | Hobby, Open Source | PHP | Creative Commons License | |
| chDB | chDB is an embedded SQL OLAP based on ClickHouse. | Relational | Singapore | 2023 | Open Source | C++ | Apache v2 |
| Cheetah | Cheetah was an embedded dBase-compatiable DBMS engine for Windows applications. | Relational | Canada | 2005 | Open Source | Visual Basic | GPL v2 |
| CheetahDB | CheetahDB is a relational DBMS designed to execute OLAP queries on GPUs. | Relational | United States of America | 2018 | Commercial | Proprietary | |
| Chroma | Chroma is a document-oriented DBMS designed to support the generation and searches on embeddings ... | Document / XML | United States of America | 2022 | Commercial, Open Source | Python | Apache v2 |
| chromem-go | chromem-go is an embedded vector database for Go-lang applications. The design of the DBMS's API ... | Vector | Germany | 2023 | Hobby, Open Source | Go | AGPL v3 |
| ChromoDB | ChromoDB is a key-value DBMS based on B-epsilon (fractal) trees. | Key/Value | Canada | 2024 | Hobby, Open Source | Go | GPL v3 |
| Chronicle Map | Chronicle Map is an in-memory key-value DBMS designed for low-latency applications. | Key/Value | United Kingdom | 2014 | Commercial, Open Source | Java | LGPL v3 |
| Chronix | Chronix is a collection of Java-based frameworks for time-series data storage and analysis. It is... | Germany | 2015 | Commercial, Open Source | Java | Apache v2 | |
| Citus | Citus is an extension to Postgres to make it a distributed, shared-nothing DBMS. | Relational | Turkey | 2010 | Commercial, Open Source | C | AGPL v3 |
| ClearDB | ClearDB is a distributed, cloud-hosted, database-as-a-service version of MySQL. Its primary purpo... | Relational | United States of America | 2010 | Commercial | C++ | Proprietary |
| ClickHouse | CilckHouse is an open-source column-oriented OLAP DBMS. It is designed to provide linear scalabil... | Relational | Russia | 2016 | Commercial, Open Source | C++ | Apache v2 |
| CloseVector | CloseVector is a vector database DBMS designed for Javascript-based environments. | Document / XML, Vector | China | 2023 | Commercial, Open Source | Apache v2 | |
| Cloud BigTable | Cloud BigTable is a distributed storage system used in Google. BigTable is designed mainly for sc... | Column Family / Wide-Column | United States of America | 2005 | Commercial | ||
| Cloud Datastore | United States of America | Commercial | Proprietary | ||||
| Cloud Firestore | Firestore is a serverless NoSQL DBMS that runs on top of Spanner. It is the backing system for Go... | Document / XML | United States of America | 2017 | Commercial | Proprietary | |
| Cloud Memorystore | United States of America | Commercial | Proprietary | ||||
| Cloud Spanner | Spanner is Google's globally distributed NewSQL database management system. It follows multi-vers... | United States of America | 2007 | Commercial | Proprietary | ||
| Cloud SQL | United States of America | Commercial | Proprietary | ||||
| Cloudant | Cloudant is a non-relational, distributed database service based on CouchDB. | Document / XML | United States of America | 2008 | Commercial | ||
| Cloudberry | Cloudberry (sometimes referred to as "CloudberryDB" or "CBDB") is a fork of Greenplum. | Object-Relational | China | 2023 | Commercial, Open Source | C | Apache v2 |
| CloudKit | CloudKit provides schema-free, auto-versioned, RESTful JSON storage. | Document / XML | United States of America | 2008 | Open Source | MIT | |
| CloudSearch | Amazon CloudSearch is a managed search engine service based on Apache Solr. | United States of America | 2012 | Commercial | Proprietary | ||
| CloverDB | CloverDB is a document-oriented DBMS designed for Go-lang applications. | Document / XML | Italy | 2022 | Hobby, Open Source | Go | MIT |
| Clusterpoint | Clusterpoint is a NoSQL document database management system. | Document / XML | Latvia | 2006 | Commercial | Proprietary | |
| Clustrix | Clustrix is a clustered relational DBMS designed to be a a drop-in MySQL replacement. It is ACID ... | Relational | United States of America | 2006 | Commercial | C | Proprietary |
| CnosDB | CnosDB is a distributed time-series database management system written in Rust. | Relational | China | 2021 | Commercial, Open Source | Rust | AGPL v3 |
| CockroachDB | CockroachDB (sometimes shortened as CRDB) is a free and open source distributed SQL database buil... | Relational | United States of America | 2014 | Commercial, Open Source | Go | Business Source License |
| CodernityDB | CodernityDB is NoSQL key-value DBMS written in Python. | Key/Value | Poland | 2011 | Open Source | Python | Apache v2 |
| CoGaDB | CoGaDB was an academic column-oriented DBMS that supported GPU acceleration. It was developed by ... | Relational | Germany | 2012 | Academic, Open Source | C++ | GPL v3 |
| CogDB | CogDB is an embedded RDF (graph) DBMS library for Python applications. | Triplestore / RDF | Canada | 2017 | Hobby, Open Source | Python | MIT |
| Coherence | Object-Oriented | United States of America | 2000 | Commercial | Java | Proprietary | |
| Column | Column is an embedded DBMS engine that stores in-memory columnar data. | Relational | United Arab Emirates | 2021 | Hobby, Open Source | Go | MIT |
| Comdb2 | Comdb2 is a consistent, synchronously replicated SQL database built by Bloomberg. | Relational | United States of America | 2004 | Open Source | C | Apache v2 |
| Compass | Compass is a powerful Search Engine mapping built on the Lucene API. It is designed for fast sear... | Document / XML, Object-Oriented | United Kingdom | 2006 | Open Source | Java | Apache v2 |
| CompleteDB | CompleteDB is an in-memory relational DBMS for transactional workloads. | Relational | United States of America | 2012 | Commercial | C++ | Proprietary |
| ComposeDB | ComposeDB is a decentralized graph DBMS running on top of IPFS. | Graph | Ireland | 2022 | Open Source | TypeScript | Apache v2, MIT |
| ComputeDB | ComputeDB is a distributed, in-memory OLAP DBMS. | Relational | United States of America | 2015 | Commercial, Open Source | Java | Apache v2 |
| ConceptBase.cc | ConceptBase.cc is a multi-user deductive and object-oriented database system for metamodeling and... | Object-Oriented | Germany | 1995 | Academic, Open Source | BSD | |
| Concourse | Concourse is a hybrid operational and analytics document-oriented DBMS that supported automatic i... | Document / XML | United States of America | 2012 | Commercial, Open Source | Java | Apache v2 |
| Condensation | Condensation is a decentralized, encrypted block-chain database system. | Object-Oriented | Switzerland | 2020 | Open Source | Java | Apache v2 |
| ConfluxDB | Canada | 2014 | Academic | ||||
| Consus | Consus is a geo-replicated transactional key-value store. | Key/Value | United States of America | 2015 | Academic, Open Source | C++ | BSD |
| Consus | Consus is a Java embedded object-relational database management system. | Object-Relational | Russia | 2004 | Open Source | Java | BSD |
| CORAL | Coral is a deductive database management system that supports a rich declarative language, and an... | United States of America | 1988 | Academic, Open Source | C++ | ||
| CoreObject | CoreObject is a version-controlled object database for Objective-C. It uses Mercurial to manage v... | Object-Oriented | France | 2007 | Academic, Open Source | Objective-C | MIT |
| CornerStone | Cornerstone was a relational database that supported Microsoft DOS. It was primarily marketed for... | Relational | United States of America | 1985 | Commercial | Proprietary | |
| CortexDB | CortexDB is a self-learning multi-model NoSQL database. | Key/Value, Document / XML | Germany | 2014 | Commercial | Proprietary | |
| Cosmos DB | CosmosDB is a globally distributed, consistent, schema-less, multi-model document database that p... | Column Family / Wide-Column, Key/Value, Graph | United States of America | 2015 | Commercial | C++ | Proprietary |
| Couchbase | Couchbase is an open-source, distributed NoSQL document database. It supports the Memcached clien... | Key/Value, Document / XML | United States of America | 2010 | Commercial, Open Source | C, C++, Erlang, Go | Apache v2 |
| CouchDB | CouchDB ("cluster of unreliable commodity hardware") is a document-oriented N... | Document / XML | United States of America | 2005 | Open Source | Erlang | Apache v2 |
| CovenantSQL | CovenantSQL is a decentralized SQL database management system derived from SQLite and built on to... | Relational | China | 2018 | Commercial, Open Source | Go | Apache v2 |
| CozoDB | CozoDB is transactional, relational DBMS that supports Datalog queries on graph data. | Relational | United Kingdom | 2022 | Hobby, Open Source | Rust | Mozilla Public License |
| CQL++ | CQL++ is a SQL and B+tree/ISAM database management system providing a single user or client/server. | Relational | United States of America | 1994 | Commercial, Open Source | C++ | GPL v2, Proprietary |
| CQLite | CQLite is an embedded graph DBMS implemented in Rust. | Graph | United Kingdom | 2021 | Hobby, Open Source | Rust | MIT |
| CrateDB | CrateDB is an open-source, distributed, shared-nothing SQL database system developed by Crate.io,... | Austria | 2014 | Commercial, Open Source | Java | Apache v2 | |
| Crescando | Crescando is a distributed relational table implementation designed to perform execute queries an... | Relational | Switzerland | 2009 | Academic | ||
| CrossDB | CrossDB is a proprietary embedded DBMS for C/C++ applications. | Relational | China | 2019 | Hobby | C++ | Proprietary |
| CrowdDB | CrowdDb is a hybrid computer-human database that processes queries using crowd-sourcing if the da... | Relational | United States of America | 2011 | Academic | ||
| CSQL | CSQL is an open-source in-memory relational DBMS. | Relational | India | 2005 | Commercial, Open Source | GPL v2 | |
| CSV Comp DB | CSV Comp DB is a proprietary desktop DBMS based on CSV files. It is designed for Windows applicat... | Relational | Brazil | 2007 | Hobby | Pascal | Proprietary |
| cubeSQL | cubeSQL is wrapper system that provides remote access to a SQLite DBMS. | Relational | Italy | 2003 | Commercial | Proprietary | |
| CubicWeb | Graph | France | 2000 | Open Source | Python | LGPL v2 | |
| Cubrick | Cubrick is a distributed multidimensional in-memory DBMS developed for internal use at Facebook. ... | Column Family / Wide-Column | United States of America | 2016 | Industrial Research | Proprietary | |
| Cubrid | CUBRID is an open-source object-relational OLTP database management system under GPL/BSD license,... | Object-Relational | South Korea | 2008 | Open Source | C | BSD, GPL v2 |
| CurioDB | CurioDB is a distributed and persistent NoSQL database that is compatible with Redis. It uses [Ak... | Key/Value | Australia | 2015 | Open Source | Scala | BSD |
| CursusDB | CursusDB is an in-memory document-oriented DBMS that supports SQL. | Document / XML | Canada | 2023 | Hobby, Open Source | Go | GPL v3 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| D3 | D3 is a multi-dimensional relational database management system. | Relational | United States of America | 1999 | Commercial | ||
| Daffodil DB | Relational | India | 2003 | Commercial | Java | Proprietary | |
| DaggerDB | DaggerDB is an ACID column store / OLAP database management system for .Net environments. | Relational | Sweden | 2014 | Commercial | ||
| DalmatinerDB | DalmatinerDB is a metric database built on Riak. | Germany | 2014 | Open Source | Erlang | MIT | |
| Dare-DB | Dare-DB (sometimes referred to as "DareDB") is an in-memory DBMS written in Go based on hash tabl... | Key/Value | Italy | 2024 | Hobby, Open Source | Go | MIT |
| dashDB | dashDB is a cloud-based data warehousing service based on IBM DB2. | Relational | United States of America | 2014 | Commercial | Proprietary | |
| Databend | Databend is distributed SQL execution engine for shared-disk storage. | Relational | China | 2020 | Commercial, Open Source | Rust | Apache v2 |
| DataBlitz | United States of America | 1993 | Industrial Research | Proprietary | |||
| DataEase | Relational | United States of America | 1981 | Commercial | |||
| DataFusion | DataFusion is an extensible framework for planning and executing SQL queries. | Relational | United States of America | 2016 | Open Source | Rust | Apache v2 |
| Datahike | Datahike is a Datalog DBMS designed to be similar to Datomic. | Germany | 2018 | Open Source | Clojure | Eclipse Public License | |
| Datalevin | Datalevin is a Datalog DBMS written in Clojure. It started out as a port of Datascript using LMDB. | Document / XML | United States of America | 2020 | Hobby, Open Source | Clojure | Eclipse Public License |
| DATAllegro | DATAllegro was a data warehouse appliance based on Ingres. | Relational | United States of America | 2003 | Commercial | Proprietary | |
| Datameer | United States of America | 2009 | Commercial | ||||
| Datascope | Datascope is a relational database system in which tables are represented by fixed-format files. ... | Relational | United States of America | 1996 | Academic, Commercial | ||
| DataScript | DataScript is an immutable in-memory database and Datalog query engine in Clojure and ClojureScript. | Key/Value | Russia | 2014 | Open Source | Clojure | Eclipse Public License |
| DataStax | United States of America | 2010 | Commercial | Proprietary | |||
| Dataupia | Dataupia was a relational data warehouse appliance that was compatible with SQL Server and Oracle. | Relational | United States of America | 2005 | Commercial | Proprietary | |
| Datomic | Datomic is a proprietary database management system. It is an operational DBMS, in other words, i... | Key/Value | United States of America | 2012 | Commercial | Clojure | Proprietary |
| Db2 | IBM Db2 is a relational database management system that is focused on transactional and warehousi... | Relational, Document / XML | United States of America | 1983 | Commercial | C, C++ | Proprietary |
| DB4IoT | DB4IoT is a time-series geospatial database-as-a-service. | Document / XML | United States of America | 2016 | Commercial | Proprietary | |
| db4o | db4o ("database for objects") was an embeddable open-source object DBMS for Java and .NET environ... | Object-Oriented | United States of America | 2000 | Commercial, Open Source | GPL v2, Proprietary | |
| DB5 | DB5 (sometimes referred to as "Vector5db") is an embedded vector DBMS that supports nearest-neigh... | Document / XML, Vector | Poland | 2023 | Open Source | TypeScript | MIT |
| dBASE | dBase is one of the first DBMSs for microcomputers. | Relational | United States of America | 1979 | Commercial | Assembly, C | Proprietary |
| dbeel | dbeel is a hobby project to build a document-oriented DBMS in Rust. | Document / XML | Israel | 2023 | Hobby, Open Source | Rust | Apache v2 |
| DBIX | DBIX is a full-featured, multi-user SQL database server for Windows 3.x/NT/95 and Unix environments. | United States of America | 1996 | Commercial | |||
| DBMaker | DBMaker is an ANSI SQL database that fully integrates into COBOL. | Relational | Taiwan | 1994 | Commercial | ||
| DBMS-20 | DBMS-20 was a network data model DBMS build by DEC for [TOPS-20](https://en.wikipedia.org/wiki/TO... | Network | United States of America | Commercial | Proprietary | ||
| DBOMP | DBOMP ("Database Organization and Maintenance Processor") was an early hierarchical database syst... | Hierarchical | United States of America | 1968 | Commercial | Proprietary | |
| DBreeze | DBreeze is a C# multi-model NoSQL DBMS. | Key/Value, Document / XML | Germany | 2012 | Open Source | C# | BSD |
| DBx1000 | DBx1000 is an experimental single-node OLTP DBMS designed to evaluate concurrency control protoco... | Relational | United States of America | 2014 | Academic, Open Source | Assembly, C++ | ISC License |
| DeepDB | DeepDB (also sometimes called DeepSQL near the end of the project) was a proprietary MySQL storag... | Relational | United States of America | 2010 | Commercial, Open Source | C++ | AGPL v3, Proprietary |
| DefraDB | DefraDB is a document-oriented database based on CRDTs. | Document / XML | Canada | 2019 | Commercial, Open Source | Go | Business Source License |
| DegDB | DegDB ("Distributed Economic Graph Database") is a graph database management system where every r... | Graph | Canada | 2015 | Open Source | Go | MIT |
| Delta Lake | Delta Lake is an open-source storage layer for big data workloads. It provides ACID transactions ... | Column Family / Wide-Column | United States of America | 2019 | Commercial, Open Source | Scala | Apache v2 |
| DensoDB | DensoDB (DotNet NoSQL DataBase) is NoSQL document database written for .Net environment. | Document / XML | Italy | 2012 | Open Source | C# | |
| Derby | Derby is a lightweight embedded relational database implemented completely in Java. It is an embe... | Relational | United States of America | 1997 | Open Source | Java | Apache v2 |
| DeveelDB | DeveelDB is an embedded relational DBMS for .NET/Mono frameworks. | Relational | Norway | 2009 | Open Source | Apache v2 | |
| DeviceSQL | DeviceSQL is low-footprint relational DBMS designed for embedded devices. | Relational | United States of America | 1998 | Commercial | C | Proprietary |
| DGraph | Dgraph is a distributed graph database that supports GraphQL. It emphasizes concurrency in distri... | Graph | United States of America | 2015 | Commercial, Open Source | Go | Apache v2 |
| DiceDB | DiceDB is an in-memory, multi-threaded key-value DBMS that supports the Redis protocol. | Key/Value | India | 2022 | Hobby, Open Source | Business Source License | |
| DiggyDB | DiggyDB is a proof-of-concept document-oriented DBMS stores data in DNS TXT records. | Document / XML | United Kingdom | 2021 | Hobby | JavaScript | |
| DIRECT | United States of America | 1978 | Academic | ||||
| DittoBitto | DittoBitto is a multi-user relational DBMS based off of the Microsoft Access file format. | Relational | South Korea | 2001 | Commercial | Proprietary | |
| Djondb | Djondb is a document-oriented DBMS from Colombia. | Document / XML | Colombia | 2012 | Commercial | ||
| DMSII | The Unisys Data Management System II (DMSII) is a network-model DBMS created by the Burroughs Cor... | Network | United States of America | 1972 | Commercial | Proprietary | |
| Dnaerys | Dnaerys is a distributed in-memory DBMS designed to store genetic variations and execute algorith... | Australia | Academic, Commercial | Scala | Proprietary | ||
| DocumentDB | Amazon DocumentDB is a document database service that supports MongoDB workloads. | Document / XML | United States of America | 2019 | Commercial | Proprietary | |
| DolphinDB | DolphinDB is a time-series and analytics database management system. | Relational | China | 2018 | Commercial | C++ | Proprietary |
| Dolt | Dolt is a single-node and embedded DBMS that incorporates Git-style versioning as a first-class e... | Relational | United States of America | 2018 | Open Source | Go | Apache v2 |
| Doris | Doris is a parallel SQL data warehouse developed by Baidu. | Relational | China | 2017 | Open Source | C++ | Apache v2 |
| Doxa | Doxa is an in-memory document-oriented DBMS. | Document / XML | Poland | 2021 | Hobby, Open Source | Clojure | Public Domain |
| Dqlite | Dqlite ("distributed SQLite") is a portable C library that provides a shared-nothing DBMS. It use... | Relational | Italy | 2017 | Open Source | C | Apache v2 |
| Dragonfly | Dragonfly is an in-memory key-value store designed to be a multi-threaded version of Redis. | Key/Value | Israel | 2021 | Commercial, Open Source | C++ | Business Source License |
| Dremio | Dremio is a distributed OLAP system inspired by Google's Dremel / BigQuery system. | Relational | United States of America | 2015 | Commercial, Open Source | Java | Apache v2 |
| DriftDB | DriftDB is a PostgreSQL-compatible DBMS that supports time-travel queries on an append-only, immu... | Relational | United States of America | 2025 | Hobby, Open Source | Rust | MIT |
| Drill | Drill is a database system designed for Big Data exploration. It is an open-source, distributed S... | Column Family / Wide-Column | United States of America | 2012 | Open Source | Java | Apache v2 |
| Drizzle | Drizzle was a fork of MySQL that has now since been abandoned. | Relational | United States of America | 2008 | Open Source | C++ | BSD, GPL v2, GPL v3 |
| Druid | Apache Druid is an open-source distributed real-time analytics database designed for business int... | Column Family / Wide-Column | United States of America | 2011 | Open Source | Java | Apache v2 |
| DuckDB | DuckDB is a relational embeddable analytical DBMS that focuses on supporting analytical query wor... | Relational | Netherlands | 2018 | Academic, Open Source | C++ | MIT |
| DuctileDB | DuctileDB is a graph-oriented DBMS built on top HBase. | Graph | Germany | 2015 | Open Source | Java | Apache v2 |
| DyBASE | DyBASE is a object-oriented embedded DBMS for languages with dynamic type checking. | Object-Oriented | Russia | Open Source | C++ | ||
| Dydra | Dydra is a cloud-hosted graph database service. | Triplestore / RDF | Germany | 2010 | Commercial | Proprietary | |
| DynamoDB | DynamoDB is a managed NoSQL database service provided by Amazon Web Services. As it is managed by... | Key/Value, Document / XML | United States of America | 2012 | Commercial | Java | Proprietary |
| DynomiteDB | United States of America | 2012 | Open Source | C | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Earthstar | Earthstar is a peer-to-peer (P2P) document-oriented database. | Document / XML | United States of America | 2020 | Academic, Open Source | TypeScript | LGPL v3 |
| EaseDB | EaseDB is a small database system for storing hierarchical data with a REST interface. | Document / XML | Russia | 2013 | Open Source | Ruby | MIT |
| EasyDB | EasyDB is an serverless ephemeral database-as-a-service where databases are dropped after a certa... | Document / XML | United States of America | 2019 | Commercial | Proprietary | |
| EchoDB | EchoDB is an in-memory, multi-versioned key-value embedded DBMS. | Key/Value | United Kingdom | 2021 | Open Source | Rust | Apache v2 |
| EcoDB | EcoDB is a document database system with a REST API. | Document / XML | Canada | 2018 | Commercial | Proprietary | |
| EdgelessDB | EdgelessDB is a MySQL-compatible DBMS designed to run inside Intel's SGX secure enclave. It is a ... | Relational | Germany | 2021 | Commercial, Open Source | GPL v2 | |
| Edis | Edis is an Erlang re-implementation of Redis. It uses LevelDB as its backing data store. | Key/Value | United States of America | 2010 | Hobby, Open Source | Erlang | |
| EffiProz | EffiProz is an embedded DBMS written in C#. It supports a SQL dialect that is similar to HSQLDB. | Relational | United States of America | Commercial, Open Source | C# | ||
| Ehcache | Ehcache is an open source Java distributed cache for general purpose caching. | Key/Value | United States of America | 2003 | Open Source | Java | Apache v2 |
| EinsteinDB | EinsteinDB is a key-value store DBMS that supports partially ordered events. | Key/Value | United States of America | 2019 | Open Source | Rust | |
| EJDB | EJDB2 is an embeddable JSON database engine | Key/Value, Document / XML | Russia | 2012 | Open Source | C | MIT |
| ekoDB | ekoDB is a hosted document-oriented DBMS. | Document / XML | United States of America | 2024 | Commercial | Rust | Proprietary |
| Elara DB | Elara DB is a key-value embedded DBMS written in Python. | Key/Value | India | 2021 | Hobby, Open Source | Python | BSD |
| ElaSQL | ElaSQL is a distributed relational experimental DBMS. | Relational | Taiwan | 2016 | Academic, Open Source | Java | Apache v2 |
| Elasticsearch | Elasticsearch is an open-source full-text search and analytics engine based on Lucene. A few samp... | Document / XML | United States of America | 2004 | Open Source | Java | Apache v2 |
| ElephantDB | ElephantDB is a database that provides an API for reading key/value data from Hadoop. ElephantDB ... | Key/Value | United States of America | 2011 | Open Source | Clojure | BSD |
| ElevateDB | ElevateDB is a database application that can be integrated with various usages. One user or numer... | Relational | United States of America | 2006 | Commercial | SQL | Proprietary |
| Elevator | Elevator is an open-source, on-disk key-value store. | Key/Value | Germany | 2012 | Open Source | MIT | |
| EliasDB | EliasDB is a lightweight graph-based database written in Go. | Graph | United Kingdom | 2016 | Open Source | Go | Mozilla Public License |
| Elliptics | Elliptics is a fault-tolerant distributed key/value (no-relational) database system. The core sto... | Key/Value | Russia | 2009 | Commercial, Open Source | C++, Python | LGPL v3 |
| Eloquera | Eloquera Database is a pure .NET object database. | Object-Oriented | Australia | 2008 | Commercial | C# | Proprietary |
| Empress | Empress is an embedded relational DBMS that supports SQL. | Relational | Canada | 1979 | Commercial | Proprietary | |
| Encompass | Tandem's initial database support was only for hierarchical, non-relational databases via the ENS... | Relational | United States of America | 1981 | Commercial | ||
| Endatabas | Endatabas is a columnar DBMS that supports SQL. | Relational, Document / XML | Sweden | 2023 | Commercial, Open Source | Lisp, Rust | AGPL v3 |
| Endeca | Endeca is a document-oriented DBMS designed for analytical workloads. | Document / XML | United States of America | 1999 | Commercial | Proprietary | |
| Engula | Engula is a distributed key-value DBMS. | Key/Value | China | 2022 | Hobby, Open Source | Rust | Apache v2 |
| EnnoDB | EnnoDB was a key/value NoSQL database designed to run on a web server. | Key/Value | Norway | 2012 | Hobby, Open Source | C | ISC License |
| Epsilla | Epsilla is vector DBMS designed to support LLMs. | Array / Matrix | United States of America | 2023 | Commercial, Open Source | C++ | GPL v3 |
| EraDB | EraDB is a timeseries DBMS that supports SQL on top of document databases. | Document / XML | United States of America | 2019 | Commercial | Rust | Proprietary |
| EsgynDB | EsgynDB is a hybrid transactional database management system built on Apache Trafodion. It is a d... | Relational | United States of America | 2015 | Commercial | C++, Java | |
| Espresso | Espresso is an internal distributed document-oriented database management system written by Linke... | Document / XML | United States of America | 2011 | Internal / Non-Public | Java | |
| Essbase | Essbase ("extended spreadsheet database") is a multidimensional database management system that p... | Array / Matrix | United States of America | 1992 | Commercial | Proprietary | |
| Essentia | Essentia was a database management system from Argentina designed to support desktop applications. | Relational, Object-Oriented | Argentina | Commercial | Proprietary | ||
| etcd | etcd is a distributed key-value store which is highly available, strongly consistent, and watchab... | Key/Value | United States of America | 2013 | Open Source | Go | Apache v2 |
| EuclidesDB | EuclidesDB is a multi-model machine learning feature DBMS designed to interoperate with PyTorch a... | Array / Matrix | Portugal | 2018 | Open Source | C++ | Apache v2 |
| EuclidOLAP | EuclidOLAP is an in-memory multi-dimensional database management system for data cubes. | Array / Matrix | China | 2022 | Hobby, Open Source | C | Apache v2 |
| Eva | Eva is a distributed DBMS with an entity-attribute-value data-model that is time-aware, accumulat... | Entity-Attribute-Value | Netherlands | Clojure | Eclipse Public License | ||
| EVA DB | EVA DB is a relational DBMS designed to operate on both structured (tables, feature vectors) and ... | Relational | United States of America | 2018 | Academic, Open Source | Python | Apache v2 |
| EVCache | EVCache is a distributed in-memory data store based on Memcached. | Key/Value | United States of America | 2012 | Open Source | Apache v2 | |
| Event Store | Event Store is an open-source, functional database designed for complex event processing workloads. | United Kingdom | 2012 | Commercial, Open Source | C#, C++, JavaScript | BSD | |
| EventQL | EventQL is a distributed, column-oriented database built for large-scale event collection and ana... | Relational | Germany | 2014 | Commercial, Open Source | C++ | AGPL v3 |
| EventSourcingDB | EventSourcingDB is an cloud-hosted DBMS that models data as immutable, append-only log of events. | Document / XML | Germany | 2022 | Commercial | Go | Proprietary |
| evitaDB | evitaDB is a DBMS designed specifically for online storefront and catalog applications. | Document / XML | Czechia | 2020 | Commercial, Open Source | Java | Business Source License |
| Exasol | Relational | Germany | 2000 | Commercial | Proprietary | ||
| eXist-db | eXist-db is an open-source XML DBMS. | Document / XML | Germany | 2000 | Commercial, Open Source | Java | LGPL v2 |
| Exorbyte | Germany | 2000 | Commercial | Proprietary | |||
| Express | Oracle Express was a multi-dimensional DBMS designed for building OLAP applications. It was avail... | Array / Matrix | United States of America | 1970 | Commercial | Proprietary | |
| Extensible Storage Engine | Extensible Storage Engine (ESE) is an embedded key-value ISAM DBMS used in various Microsoft prod... | Key/Value | United States of America | 1994 | Commercial, Open Source | C++ | MIT |
| eXtremeDB | eXtremeDB is a DBMS that supports both on-disk and in-memory databases. There are multiple editio... | Column Family / Wide-Column, Relational, Key/Value, Entity-Relationship | United States of America | 2001 | Commercial | C, C++ | Proprietary |
| EyeDB | EyeDB is an object-oriented DBMS written for Java and C++ applications. | Object-Oriented | France | 1992 | Academic, Open Source | C++ | LGPL v2 |
| eyros | eyros is a multi-dimensional interval DBMS designed for geospatial and time-series databases. | Array / Matrix | United States of America | 2018 | Open Source | Rust | Parity Public License |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| FairCom DB | FairCom DB is an embedded key-value store DBMS engine. | United States of America | 1984 | Commercial | C | Proprietary | |
| Falcon | Falcon was a transactional storage engine being developed for the MySQL relational database manag... | United States of America | 2006 | Commercial, Open Source | |||
| FalkorDB | FalkorDB is a property graph DBMS that runs on top of Redis. It uses GraphBLAS for its sparse adj... | Graph | Israel | 2023 | Commercial, Open Source | C | Server Side Public License |
| Fallen-8 | Fallen-8 is an in-memory graph DBMS implemented in C#. | Graph | Germany | 2011 | Hobby, Open Source | C# | MIT |
| FastDB | Relational | Russia | 2011 | Open Source | C++ | ||
| FASTER | FASTER is a embedded transactional key-value storage manager from Microsoft. | Key/Value | United States of America | 2018 | Commercial, Open Source | C#, C++ | MIT |
| FastObjects | FastObjects is an object-oriented database management system designed to store C++ and Java objec... | Object-Oriented | Germany | 1993 | Commercial | C++ | Proprietary |
| FatDB | United States of America | 2012 | Commercial | C# | |||
| FathomDB | FathomDB was a relational database-as-a-service (based on MySQL) that supported Amazon and Racksp... | United States of America | 2009 | Commercial | |||
| FaunaDB | FaunaDB is a cloud-native OLTP database with distributed ACID transactions using the Calvin proto... | Relational, Key/Value, Document / XML, Graph | United States of America | 2012 | Commercial | Scala | Proprietary |
| FBase | FBase is a time-series columnar DBMS written in Java. | Relational | Russia | 2022 | Hobby | Java | Apache v2 |
| FeatureBase | FeatureBase is a relational DBMS designed for automated featured extraction for analytical worklo... | Relational | United States of America | 2017 | Open Source | Go | Apache v2 |
| FeatureForm | Embeddinghub is a vector DBMS designed for performing nearest neighbor searches. | Vector | United States of America | 2020 | Commercial, Open Source | Go | Mozilla Public License |
| FerretDB | FerretDB is a document-oriented query middleware on top of PostgreSQL. | Document / XML | United States of America | 2021 | Open Source | Go | |
| FileDb | FileDb was a embedded relational DBMS for for .NET, Silverlight, and Windows Phone applications. | Relational | Australia | 2011 | Commercial, Open Source | C# | Mozilla Public License |
| FileDB | FileDB is a lightweight C# library to store, retrieve, and delete named blobs using a single arch... | Key/Value | Brazil | 2010 | Hobby, Open Source | C# | MIT |
| FileMaker | FileMaker is a proprietary relational database application which can be used in a cross-platform ... | Relational | United States of America | 1985 | Commercial | Proprietary | |
| FiloDB | FiloDB is an open-source distributed, versioned, and columnar analytical database designed for mo... | United States of America | 2015 | Open Source | Scala | Apache v2 | |
| FinchDB | FinchDB is a proprietary in-memory, distributed document-oriented DBMS. | Document / XML | United States of America | 2015 | Commercial | Proprietary | |
| FineDB | FineDB is a multi-threaded NoSQL DBMS written in C, founded by Amaury Bouchard in 2013. It is bas... | Key/Value | France | 2013 | Hobby, Open Source | C | Apache v2 |
| Firebase | The Firebase Realtime Database is a cloud-hosted NoSQL DBMS. | Document / XML | United States of America | 2011 | Commercial | Proprietary | |
| Firebird | Firebird is a free, open-source, SQL relational database management system based on the open sour... | Relational | United States of America | 2000 | Open Source | C, C++ | Mozilla Public License |
| Firebolt | Firebolt is a cloud-based data warehouse designed for analytical workloads. | Relational | Israel | 2020 | Commercial | Proprietary | |
| Fireproof | Fireproof is an embedded document-oriented database based on CRDTs and IPFS. It is designed for J... | Document / XML | United Kingdom | 2022 | Commercial, Open Source | JavaScript | Apache v2 |
| FirstSQL/J | FirstSQL/J is an Object-Relational Database Management System (ORDBMS) written fully in Java. It ... | Object-Relational | United States of America | 2001 | Commercial | Java | Proprietary |
| Fjall | Fjall is a log-structured, embedded key-value DBMS written in Rust. | Key/Value | Germany | 2023 | Hobby, Open Source | Rust | Apache v2, MIT |
| FlashDB | FlashDB is an embedded key-value DBMS. | Key/Value | China | 2020 | Hobby, Open Source | C | Apache v2 |
| FleetDB | FleetDB is an in-memory, document-oriented DBMS. | Document / XML | United States of America | 2009 | Academic, Open Source | Clojure | MIT |
| FlockDB | FlockDB was a distributed, fault-tolerant graph database. | Graph | United States of America | 2010 | Open Source | Scala | Apache v2 |
| Fluree | Fluree is a ledger-backed semantic graph database with a cloud-native architecture. | Relational, Document / XML, Graph, Triplestore / RDF | United States of America | 2017 | Commercial, Open Source | Clojure | AGPL v3 |
| Fongo | Fongo ("Fake Mongo") is a in-memory re-implementation of MongoDB written in Java. The goal of the... | Document / XML | United States of America | 2012 | Open Source | Java | Apache v2 |
| ForestDB | ForestDB is a single-node key-value storage engine Couchbase server. It addresses the performance... | Key/Value | United States of America | 2013 | Open Source | C++ | Apache v2 |
| FoundationDB | FoundationDB is a distributed non-relational database that supports ACID transactions and OLTP wo... | Key/Value | United States of America | 2009 | Open Source | C++ | Apache v2 |
| FoxPro | FoxPro was relational database management system for desktop applications. | Relational | United States of America | 1984 | Commercial | C++ | Proprietary |
| FramerD | FramerD is a distributed object-oriented DBMS designed to support the maintenance of knowledge ba... | Object-Oriented | United States of America | 1996 | Academic, Open Source | C | GPL v2 |
| Frigatebird | Frigatebird is an embedded columnar database that implements a push-based Volcano execution model... | Relational | Netherlands | 2025 | Hobby, Open Source | Rust | MIT |
| FrontBase | Relational | Denmark | 1993 | Commercial | C | Proprietary | |
| FrostDB | FrostDB is an embedded columnar DBMS written in Go designed for observability time-series data sets. | Column Family / Wide-Column | United States of America | 2022 | Open Source | Go | Apache v2 |
| FuelDB | FuelDB is a real-time document-oriented database management system designed to run Node.js. | Document / XML | France | 2014 | Open Source | Java | MIT |
| FusionDB | FusionDB was a document-oriented DBMS that supported XQuery statements. | Document / XML | United Kingdom | 2019 | Commercial | Proprietary |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Gadfly | Gadfly is a relational database management system written using Python modules and optional Pytho... | Relational | United States of America | 1994 | Open Source | Python | Python License |
| Gaffer | Gaffer is a ER database written in Java. | Entity-Relationship | United Kingdom | 2016 | Open Source | Java | Apache v2 |
| Gaia | Gaia is an in-memory DBMS designed for embedded devices. | Object-Oriented | United States of America | 2020 | Commercial, Open Source | C++ | MIT |
| Galaxybase | Galaxybase is a distributed graph database system written in Java. | Graph | China | 2013 | Commercial | Java | Proprietary |
| GAMMA | United States of America | Academic | |||||
| Garnet | Garnet is a Redis-compatible key-value store cache developed by Microsoft Research. | Key/Value | United States of America | 2021 | Industrial Research, Open Source | C# | MIT |
| GaussDB | GaussDB is a distributed DBMS based on Postgres developed by Huawei. | Object-Relational | China | 2011 | Commercial | Proprietary | |
| GBase | GBase is a distributed column store DBMS. | China | 2010 | Commercial | Proprietary | ||
| GDBM | GDBM (GNU dbm) is an embedded DBMS library that provides a key/value storage manager using extens... | Key/Value | United States of America | 1990 | Open Source | C | GPL v2 |
| Gel | Gel is a "graph-relational" database that aims to solve design problems posed by relational model... | Object-Relational | Canada | 2018 | Commercial, Open Source | C, Python, Rust | Apache v2 |
| GemFire | United States of America | Commercial | |||||
| GemStone/S | GemStone/S is an object-oriented DBMS designed for Smalltalk applications. | Object-Oriented | United States of America | 1986 | Commercial | Smalltalk | Proprietary |
| Genesis DB | Genesis DB is a document-oriented DBMS for streaming workloads. | Document / XML | Austria | 2025 | Commercial | Go | Proprietary |
| GenieDB | GenieDB was a cloud-based database-as-a-service for MySQL. | Relational | United States of America | 2008 | Commercial | Proprietary | |
| Genji | Genji is an embedded DBMS written in Go that supports SQL over document-oriented databases. | Document / XML | United Arab Emirates | 2018 | Open Source | Go | |
| GenomicsDB | GenomicsDB is an embedded storage engine for sparse array data, specifically for genomic data. | Array / Matrix | United States of America | 2016 | Industrial Research | C++ | MIT |
| Geode | Apache Geode is an open-source, in-memory distributed database designed to support transactional ... | Key/Value | United States of America | 2015 | Open Source | Java | Apache v2 |
| GeoSpock DB | GeoSpock DB is geospatial analytics database build on top of PrestoDB. | Relational | United Kingdom | 2013 | Commercial | Proprietary | |
| GhostDB | GhostDB is a distributed in-memory key-value DBMS designed for caching. | Key/Value | Ireland | 2020 | Open Source | Go | BSD |
| GigaBASE | GigaBASE is object-relational embedded database engine for C++ applications. It provides SQL-like... | Object-Relational | Russia | Hobby, Open Source | C++ | ||
| GlareDB | GlareDB is a federated database middleware that supports query execution across multiple DBMS and... | Relational | United States of America | 2022 | Commercial, Open Source | Rust | AGPL v3 |
| GlobalsDB | GlobalsDB was a closed-source NoSQL DBMS written in Java. It supported programming APIs for Java,... | Array / Matrix | United States of America | 2011 | Commercial | Java | Proprietary |
| Glowdust | Glowdust is a database management system based on functions. | Relational | Sweden | 2023 | Hobby, Open Source | Rust | GPL v3 |
| Gnocchi | Gnocchi is an open-source time series database service for the OpenStack platform. It supports st... | Relational | France | 2014 | Open Source | Python | Apache v2 |
| GNU SQL Server | Portable multiuser relational database management system. It supports the full SQL89 dialect and ... | Relational | Russia | 1997 | Open Source | C | GPL v2 |
| GoatDB | GoatDB is an embedded document-oriented DBMS designed for JavaScript environments. | Document / XML | Israel | 2024 | Open Source | TypeScript | Apache v2 |
| GOLD STAR | United States of America | 1970 | Academic | ||||
| Goldilocks | Goldilocks is an in-memory relational DBMS from South Korea. | Relational | South Korea | 2010 | Commercial | Proprietary | |
| GOODS | GOODS ("Generic Object Oriented Database System") is an object-oriented distributed DBMS using an... | Object-Oriented | Russia | Open Source | MIT | ||
| Google F1 | F1 is a relational distributed transactional database. And it's built on Google's Spanner so that... | Relational | United States of America | 2013 | Commercial | C++ | |
| GoshawkDB | GoshawkDB is an object-oriented database management system. | Object-Oriented | United Kingdom | 2015 | Commercial, Open Source | Go | AGPL v3 |
| GRACE | Japan | 1981 | Academic | ||||
| GraphBase | Graph | Australia | Commercial | Proprietary | |||
| GraphDB | GraphDB is a distributed RDF graph database that supports SPARQL queries. It is implemented as a ... | Triplestore / RDF | Bulgaria | 2000 | Commercial | Java | Proprietary |
| GrapheekDB | GrapheekDB is a lightweight graph database with support for multiple back-end storage managers. I... | Key/Value, Graph | France | 2014 | Open Source | Python | GPL v3 |
| GrapheneDB | GrapheneDB is a cloud-based Database-as-a-Service provider for graph databases based on Neo4j. Th... | Graph | Spain | 2012 | Commercial | Proprietary | |
| Graphik | Graphik is a document DBMS written in Go. | Document / XML | United States of America | 2020 | Hobby, Open Source | Go | Apache v2 |
| Graviton | Graviton Database is an embedded key-value DBMS that supports snapshot versioning. | Key/Value | France | 2020 | Open Source | Go | GPL v3 |
| GreatSQL | GreatSQL (GreatDB) is a fork of Percona's MySQL Server. | Relational | China | 2020 | Commercial, Open Source | C++ | GPL v2 |
| Greenplum | Greenplum is an open-source data warehouse. It uses massive parallel processing to provide large-... | Relational | United States of America | 2003 | Commercial | C | Apache v2, Proprietary |
| GreptimeDB | GreptimeDB is a distributed time-series DBMS written in Rust. | Relational | China | 2022 | Commercial, Open Source | Rust | Apache v2 |
| GridDB | GridDB is a distributed key-value DBMS built by Toshiba. It has Key-Container data model and time... | Key/Value | Japan | 2011 | Commercial, Open Source | C++ | AGPL v3, Apache v2 |
| GridGain | GridGain is the commercial version of Apache Ignite. | Key/Value | United States of America | 2007 | Commercial, Open Source | Java | Apache v2 |
| Groonga | Groonga is a column-oriented DBMS with a full-text search index. | Japan | 2009 | Commercial | C | LGPL v2 | |
| GT.M | Key/Value | United States of America | 1986 | Commercial | Proprietary | ||
| GUN | Gun is an open-source and realtime, decentralized, offline-first, graph database engine written i... | Graph | United States of America | 2014 | Commercial, Open Source | JavaScript | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| H-Store | H-Store was an experimental database management system designed for on-line transaction processin... | Relational | United States of America | 2006 | Academic, Open Source | C++, Java | BSD, GPL v3 |
| H2 | H2 ("Hypersonic 2") is an open-source lightweight relational database management system implement... | Relational | Switzerland | 2004 | Open Source | Java | Eclipse Public License, Mozilla Public License |
| Hadapt | United States of America | 2009 | Commercial | Java | |||
| Hadoop | Hadoop is a compute and storage framework for executing queries over shared-disk storage using th... | United States of America | 2006 | Open Source | Java | Apache v2 | |
| HailDB | HailDB was a fork of MySQL's InnoDB storage engine to provide it as a shared library with NoSQL A... | Key/Value | Australia | 2010 | Open Source | ||
| Haixun | China | ||||||
| HaloDB | HaloDB is an embedded key-value store written in Java. | Key/Value | United States of America | 2017 | Industrial Research, Open Source | Java | Apache v2 |
| HampusDB | HampusDB (HDB) is a key-value DBMS that combines concepts from filesystems and databases. It prov... | Key/Value | Sweden | 2006 | Hobby, Open Source | C | LGPL v2 |
| HANA | SAP HANA is a column-oriented, in-memory relational DBMS developed by SAP SE that is designed for... | Column Family / Wide-Column | Germany | 2010 | Commercial | C++ | Proprietary |
| HanoiDB | HanoiDB is an indexed, key/value storage engine. The primary index is a log-structured merge tree. | Key/Value | Denmark | 2012 | Open Source | Erlang | |
| HarperDB | HarperDB is a serverless document DBMS that supports SQL. | Document / XML | United States of America | 2017 | Commercial | JavaScript | Proprietary |
| HAWQ | HAWQ ("Hadoop With Query") is a distributed SQL execution engine that runs on top of Hadoop. | Relational | United States of America | 2015 | Open Source | Java | Apache v2 |
| HaystackDB | HaystackDB is a vector DBMS based on MMAP storage. | Vector | United States of America | 2024 | Hobby, Open Source | Rust | Apache v2 |
| Hazelcast | Hazelcast IMDG (In Memory Data Grid) is a Java-based NoSQL open-source distributed in-memory data... | Key/Value | United States of America | 2008 | Commercial, Open Source | Java | Apache v2 |
| HBase | HBase is an open source, distributed, non-relational, scalable big data store that runs on top of... | Column Family / Wide-Column | United States of America | 2007 | Open Source | Java | Apache v2 |
| HeavyDB | HeavyDB is a relational, columnar database engine that uses GPUs to accelerate query execution. | Relational | United States of America | 2013 | Commercial, Open Source | C++ | Apache v2 |
| Hekaton | Hekaton is a memory-optimized OLTP engine integrated in SQL Server 2014 and is also known as The ... | Relational | United States of America | 2012 | Commercial | Proprietary | |
| Helium | Helium is a key-value storage engine that uses kernel bypass methods for reading/writing from SSDs. | Key/Value | United States of America | 2017 | Commercial | Proprietary | |
| HelixDB | HelixDB is a graph-oriented DBMS designed for nearest-neighbor searches over vectors. It uses LMD... | Graph, Vector | United States of America | 2024 | Commercial, Open Source | Rust | GPL v3 |
| HerdDB | HerdDB is a distributed SQL DBMS implemented in Java, optimized for primary key read/update acces... | Relational | Italy | 2016 | Open Source | Java | Apache v2 |
| Heroic | Heroic is an open-source time-series DBMS built at Spotify to more effectively compute and analyz... | Key/Value | Sweden | 2015 | Open Source | Java | Apache v2 |
| HexaDB | HexaDB is an HTAP system that is compatible with Postgres. | Relational | China | 2023 | Commercial | Proprietary | |
| HFSQL | HFSQL is an embedded relational DBMS for the WINDEV d... | France | Commercial | Proprietary | |||
| Hibari | Hibari is a distributed, ordered key-value, storage engine. | Key/Value | Japan | 2005 | Open Source | Erlang | Apache v2 |
| HighContext | HighContext is a database-as-a-service system that provides a key/value REST API for storing JSON... | Key/Value | United States of America | 2023 | Commercial | Ruby | Proprietary |
| hipsterDB | hipsterDB is a toy key/value DBMS project that is designed to only return data as long as that da... | Key/Value | United States of America | 2013 | Hobby, Open Source | Go | |
| HiRDB | HiRDB is a distributed relational DBMS built by Hitachi. | Relational, Document / XML | Japan | 1994 | Commercial | Proprietary | |
| Histore | Histore is a JavaScript-based key-value storage engine backed by navigation state. | Key/Value | United States of America | 2018 | Hobby, Open Source | JavaScript | Apache v2 |
| Hive | Apache Hive is a data warehouse software built on top of Hadoop that facilitates reading, writing... | Relational | United States of America | 2010 | Open Source | Java | Apache v2 |
| Hive (Dart) | Hive is an embedded key-value data store written in Dart. | Key/Value | Germany | 2019 | Open Source | Dart | Apache v2 |
| HollowDB | HollowDB is a decentralized key-value DBMS using the Arweave blockchain. | Key/Value | Turkey | 2023 | Hobby, Open Source | TypeScript | MIT |
| HoraeDB | HoraeDB is a distributed, schema-less, time-series DBMS. | Relational | China | 2021 | Open Source | Rust | Apache v2 |
| hss.db | hss.db is an embedded object-relational DBMS with a LINQ-based query engine. | Object-Relational | United States of America | 2009 | Commercial | C# | Proprietary |
| HStreamDB | HStreamDB is an open source distributed streaming database designed for accessing, storing, and p... | Relational | China | 2020 | Commercial, Open Source | Haskell | BSD |
| HugeGraph | HugeGraph is a graph database middleware. | Graph | China | 2017 | Open Source | Java | Apache v2 |
| Husky | Husky is an internal event-store DBMS built by Datadog. | Document / XML | United States of America | 2020 | Internal / Non-Public | Go | Proprietary |
| Hydra | Hydra is a data warehouse using PostgreSQL as its frontend and Citus' c-store extension for colum... | Object-Relational | Canada | 2022 | Commercial, Open Source | C | AGPL v3, Apache v2 |
| HyPer | The HyPer DBMS is an in-memory database which aims to achieve high performance for both OLTP and ... | Relational | Germany | 2010 | Academic | C++ | Proprietary |
| HyperDB | HyperDB is a parody vector DBMS written in Python. | Document / XML, Vector | United States of America | 2023 | Hobby, Open Source | Python | MIT |
| HyperDex | HyperDex is a distributed, searchable, and consistent key-value store. It is mainly developed by ... | Key/Value | United States of America | 2011 | Academic, Open Source | C++ | BSD |
| HyperGraphDB | HyperGraphDB is an extensible open-source graph-based data storage engine. It implements the abil... | Graph | United States of America | 2007 | Open Source | Java | Apache v2 |
| HyperSQL | HSQLDB (Hyper SQL Database) is a relational database management system written in Java. | Relational | United States of America | 2001 | Open Source | Java | BSD |
| Hypertable | Hypertable is an open source database modeled after Bigtable, Google's massively scalable databas... | Column Family / Wide-Column | United States of America | 2008 | Commercial, Open Source | C++ | GPL v3 |
| Hyrise | Hyrise is a platform for research and education in the area of relational in-memory databases. Th... | Relational | Germany | 2009 | Academic, Open Source | C++ | MIT |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| iBoxDB | iBoxDB is a transactional document-oriented NoSQL database management system. | Document / XML | China | 2014 | Commercial | C#, Java | Proprietary |
| Icecoal | Icecoal is an embedded SQL DBMS written in Python. It stores all data as plain-text CSV files. | Relational | India | 2020 | Hobby, Open Source | Python | MIT |
| IceFireDB | IceFireDB is as distributed NoSQL key/value DBMS that supports the Redis wire protocol. | Key/Value | China | 2021 | Hobby, Open Source | Go | Apache v2 |
| IDMS | IDMS ("Integrated Database Management System") is a network model (CODASYL) DBMS for mainframes. ... | Network | United States of America | 1973 | Commercial | Proprietary | |
| Ignite | Ignite is an in-memory, distributed key-value store which uses a shared-nothing, node-based clust... | Key/Value | United States of America | 2014 | Open Source | Java | Apache v2 |
| ImmortalDB | ImmortalDB is a key-value store for the browser that stores data in redundant locations (e.g., co... | Key/Value | United States of America | 2018 | Open Source | JavaScript | MIT |
| Immudb | immudb is a immutable key-value DBMS written in Go. | Key/Value | United States of America | 2019 | Open Source | Go | Apache v2 |
| Impala | Impala is an open source SQL engine that offers interactive query processing on data stored in Ap... | Relational | United States of America | 2013 | Commercial, Open Source | C++ | Apache v2 |
| IMS | Hierarchical | United States of America | 1968 | Commercial | Proprietary | ||
| Indica | Netherlands | 2014 | Commercial | Proprietary | |||
| IndraDB | IndraDB is a graph database system written in Rust. | Graph | United States of America | 2016 | Rust | Mozilla Public License | |
| InfiniDB | InfiniDB is a column-store DBMS optimized for OLAP workloads. It has a distributed architecture t... | Relational | United States of America | 2000 | Commercial, Open Source | C++ | GPL v2 |
| Infinispan | Infinispan is a distributed cache and key-value NoSQL storage system developed by Red Hat. | Key/Value | United States of America | 2009 | Commercial, Open Source | Java | Apache v2 |
| InfiniSQL | Relational | United States of America | 2013 | Open Source | C++ | GPL v3 | |
| InfiniteGraph | InfiniteGraph is a graph-oriented DBMS. | Graph | United States of America | 2010 | Commercial | C++, Java | Proprietary |
| Infinity | Infinity is a relational DBMS built that provides vector search, full-text search, and structured... | Relational | China | 2022 | C++ | Apache v2 | |
| InfinityDB | InfinityDB is an embedded database engine based on a B+Tree written in Java. It supports relation... | Relational, Key/Value, Graph, Hierarchical, Array / Matrix | United States of America | 2002 | Commercial | Java | Proprietary |
| InfluxDB | InfluxDB is an open source time series database built by InfluxData. Optimized for the storage an... | Column Family / Wide-Column | United States of America | 2013 | Commercial, Open Source | Go | MIT |
| Infobright | Infobright is a column-oriented analytical DBMS engine for MySQL. The internal architecture of In... | Relational | Canada | 2005 | Commercial | Proprietary | |
| InfoFrame | InfoFrame Elastic Relational Store (IERS) is a distributed database management system for OLTP wo... | Relational | Japan | 2013 | Commercial | Proprietary | |
| InfoGrid | InfoGrid is a web graph database with additional software components that make the development of... | Graph | United States of America | 2008 | Open Source | AGPL v3 | |
| Informix | Informix is one the original commercial relational DBMS from the 1980s. | Relational | United States of America | 1980 | Commercial | Proprietary | |
| Ingres | Ingres is one of the first ever relational database management systems (DBMSs). Actian Corporatio... | Relational | United States of America | 1974 | Academic, Commercial, Open Source | C | Proprietary |
| InMemory.Net | InMemory.Net is a database for the .Net environment. It is designed to run as a standalone Window... | Relational | Ireland | 2014 | Commercial | ||
| InstantDB | Relational | United States of America | 1997 | Commercial | Java | Proprietary | |
| Integrated Data Store | Network | United States of America | 1964 | Commercial | |||
| InterBase | InterBase is a light-weight, embeddable, cross-platform Relational Database Management System. In... | Relational | United States of America | 1984 | Commercial | C | Proprietary |
| IonDB | IonDB is an key-value DBMS designed for embedded devices. | Key/Value | Canada | 2015 | Academic, Open Source | C | BSD |
| IoTDB | IoTDB is a specialized database management system for time series data generated by a network of ... | Hierarchical | China | 2017 | Academic, Open Source | Java | Apache v2 |
| IQrypt | IQrypt is built from scratch with privacy and security in mind. It encrypts the data on client co... | Document / XML | Romania | 2015 | Commercial | Proprietary | |
| Irmin | Irmin is an embedded database storage library for decentralized databases that are mergeable and ... | Document / XML | France | 2013 | Open Source | Ocaml | ISC License |
| ITTIA DB SQL | Relational | United States of America | 2000 | Commercial | Proprietary |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Jackrabbit | Apache Jackrabbit is an content repository database for the Java platform. | Object-Oriented | Switzerland | 2004 | Open Source | Java | Apache v2 |
| Jade | Object-Oriented | New Zealand | 1996 | Commercial | |||
| JaguarDB | JaguarDB is a distributed SQL DBMS that stores data as a flat array containing records of fixed-l... | Key/Value, Array / Matrix | United States of America | 2017 | Commercial, Open Source | C++ | MIT |
| JameSQL | JameSQL is an in-memory document-oriented DBMS that supports full-text search indexes. | Document / XML | United Kingdom | 2024 | Hobby, Open Source | Python | MIT |
| JanusGraph | JanusGraph is a transactional graph DBMS optimized for storing and querying graphs distributed ac... | Graph | United States of America | 2012 | Open Source | Java | Apache v2 |
| JasDB | JasDB is a NoSQL document-oriented DBMS for Android devices. | Document / XML | Netherlands | 2013 | Commercial, Open Source | Java | MIT |
| jasonisnthappy | jasonisnthappy is an embedded, single-file document-oriented DBMS that supports MVCC concurrency ... | Document / XML | India | 2025 | Hobby, Open Source | Rust | MIT |
| jBASE | United Kingdom | 1989 | |||||
| Jena | Apache Jena is an open-source data framework for Java. It provides an API to extract data from an... | Triplestore / RDF | United Kingdom | 2000 | Open Source | Java | Apache v2 |
| JinDB | JinDB is a prototype relational DBMS written in Rust. | Japan | 2019 | Hobby, Open Source | Rust | MIT | |
| Joedb | Joedb ("Journal-Only Embedded Database") is an embedded DBMS engine for C++ applications. | Relational | France | 2014 | Hobby, Open Source | C++ | MIT |
| JoinBase | JoinBase is a closed-source proprietary DBMS designed for time-series workloads. | Relational | China | Proprietary | |||
| JSDB | JSDB (JavaScript Database) is an in-memory DBMS designed for Node.js. | Document / XML | Ireland | 2020 | Hobby, Open Source | JavaScript | AGPL v3 |
| JSONBin.io | JSONbin.io is a document-oriented database-as-a-service. | Document / XML | India | 2017 | Commercial | Proprietary | |
| jsonstore.io | jsonstore.io is a free JSON cloud hosted DBMS for small projects. | Document / XML | Israel | 2018 | Open Source | JavaScript | MIT |
| JSqlDb | JSqlDb is a Javascript database engine. | Document / XML | South Africa | 2017 | Open Source | C++ | LGPL v3 |
| JuliaDB | JuliaDB is parallel analytical DBMS for processing data sets. It is written in pure Julia. | Relational | United States of America | 2017 | Open Source | Julia | MIT |
| JunoDB | JunoDB is a distributed key-value store developed at PayPal. | Key/Value | United States of America | Open Source | Go | Apache v2 | |
| Just Logic/SQL | Relational | Canada | 1994 | Commercial | Proprietary | ||
| JustinDB | JustinDB KV is an eventually consistent key-value DBMS inspired by Amazon's DynamoDB. | Key/Value | Poland | 2015 | Open Source | Scala | Apache v2 |
| JustOneDB | JustOneDB was a forked of PostgreSQL designed to support analytical workloads. | Object-Relational | United Kingdom | 2010 | Commercial |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| KahaDB | KahaDB is a file-based persistence database for the ActiveMQ framework. | United States of America | Open Source | Java | Apache v2 | ||
| Kai | Kai is an open-source distributed key-value database, which is inspired by Amazon's Dynamo. Same ... | Key/Value | Japan | 2008 | Open Source | Erlang | |
| KairosDB | KairosDB is a distributed time-series database based on Cassandra. | United States of America | 2013 | Open Source | Apache v2 | ||
| KantoDB | KantoDB is an OLTP relational DBMS that supports both standalone and embedded deployments. | Relational | Finland | 2025 | Commercial, Hobby, Open Source | Rust | |
| Kappa | Kappa was a parallel DBMS designed for knowledge information processing (KIPS). The name Kappa is... | Object-Relational | Japan | 1989 | Industrial Research, Open Source | C, KL1 | Proprietary |
| KarelDB | KarelDB is a relational database backed by Apache Kafka. | Relational | United States of America | 2019 | Open Source | Java | Apache v2 |
| Kdb+ | Kdb+ is a column-based relational time series database, developed by Kx Systems. Kdb+ database is... | Relational | United States of America | 1998 | Commercial | Proprietary | |
| KekeDB | KekeDB is a SQL DBMS designed for embedded Linux systems. | Relational | Finland | Open Source | C | GPL v2 | |
| KektorDB | KektorDB is an embedded in-memory graph DBMS. | Graph | Italy | 2025 | Hobby, Open Source | Go | Apache v2 |
| KenobiDB | KenobiDB is a document-oriented middleware that provides a JSON API on top of SQLite. | Document / XML | United States of America | 2019 | Hobby, Open Source | Python | BSD |
| Kerf | Kerf is a columnar tick database and time-series language. It is written in C and natively speaks... | United States of America | 2014 | Commercial, Open Source | C | ||
| KeyDB | KeyDB is a fork of Redis that provides additional features, such as multi-threading. | Canada | 2019 | Commercial, Open Source | C++ | BSD | |
| Kinetica | Kinetica is a distributed, GPU-accelerated database with filtering, visualization, and aggregatio... | Relational | United States of America | 2009 | Commercial | C, C++ | Proprietary |
| Kingbase | Kingbase is a suite of database products from China. | China | 1999 | Commercial | Proprietary | ||
| KingDB | KingDB is a persistent key-value DBMS that uses a MMAP-ed hash-table to store data. | Key/Value | Netherlands | 2012 | Hobby, Open Source | BSD | |
| Kinto | Kinto is a document-oriented DBMS that supports JSON. | Document / XML | Spain | 2014 | Commercial, Open Source | Python | Mozilla Public License |
| KirbyBase | KirbyBase is an embedded DBMS that stores its data in plain-text files. There are two separate im... | United States of America | 2003 | Open Source | Python, Ruby | ||
| KitaroDB | KitaroDB is a NoSQL database developed for Windows environments (WinRT, Win32, and .NET). | Key/Value | United States of America | 2012 | Commercial | C | Proprietary |
| Kognitio | United Kingdom | Commercial | Proprietary | ||||
| Krati | Krati is a persistent key/value data store written in Java with low latency and high throughput. ... | Key/Value | United States of America | 2010 | Hobby, Open Source | Java | Apache v2 |
| Kronotop | Kronotop is a distributed document database based on FoundationDB. | Document / XML | Turkey | 2023 | Hobby, Open Source | Java | Apache v2 |
| ksqlDB | ksqlDB (Kafka SQL) is a streaming SQL engine that provides SQL interface to the streams in Apache... | Relational, Key/Value | United States of America | 2017 | Commercial, Open Source | Java | Confluent Community License |
| Kubl | Kubl was a relational DBMS initially developed in Finland during the 1990s. The company was acqui... | Object-Relational | Finland | 1994 | Commercial | Proprietary | |
| Kudu | Apache Kudu is an open source storage engine for structured data that is part of the Apache Hadoo... | Relational | United States of America | 2016 | Open Source | C++ | Apache v2 |
| Kunlun | Kunlun distributed relational DBMS design for OLTP workloads. It is based on a fork of PostgreSQL. | Relational | China | 2019 | Hobby, Open Source | C | Commons Clause License |
| Kuzu | Kuzu is an embedded graph DBMS with built-in vector and full-text search support. | Graph | Canada | 2020 | Academic, Commercial, Open Source | C++ | MIT |
| KVdb | KVdb is a key-value database-as-a-service with a simple REST API. | Key/Value | United States of America | 2018 | Commercial | Proprietary | |
| Kvrocks | Kvrocks is a distributed key-value DBMS that is compatible with the Redis wire proto... | Key/Value | China | 2019 | Commercial, Open Source | C++ | Apache v2 |
| Kylin | Kylin is an open source distributed data analytics engine on top of SparkSQL/Hive. It offers SQL ... | Key/Value | China | 2013 | Open Source | Java | Apache v2 |
| Kyoto Cabinet | Kyoto Cabinet is a library of routines to manage a database. It is a multithreaded key-value embe... | Key/Value | Japan | 2009 | Open Source | C++ | GPL v3 |
| Kyoto Tycoon | Key/Value | Japan | Open Source | ||||
| Kyuubi | Kyuubi is a middleware that provides a standardized SQL interface to different query engines. It ... | Relational | China | 2017 | Open Source | Java | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| LadybugDB | LadybugDB is a embedded graph-oriented DBMS. | Graph | United States of America | 2025 | Open Source | C++ | MIT |
| LanceDB | LanceDB is an open-source document-oriented DBMS that supports vector search operations. | Document / XML | United States of America | 2023 | Open Source | Rust | Apache v2 |
| Lazer | Lazer is a flat-file database written in PHP for storing JSON data. It runs embedded inside of a ... | Document / XML | Poland | 2013 | Open Source | PHP | MIT |
| LazyDB | LazyDB is cloud database-as-a-service that uses Lua-based queries. | Document / XML | France | 2020 | Commercial | Proprietary | |
| Lealone | Lealone is a distributed relational DBMS based on the H2 embedded database. | Relational | China | 2012 | Hobby, Open Source | Java | Eclipse Public License, Mozilla Public License |
| LeanStore | LeanStore is an embedded OLTP storage engine optimized for many-core CPUs and NVMe SSDs. | Key/Value | Germany | 2018 | Academic | C++ | MIT |
| LeanXcale | Relational | Spain | 2010 | Academic, Commercial | |||
| LEAP | LEAP is an educational relational database management system. It supports relations, has a query ... | Relational | United Kingdom | 1997 | Educational, Open Source | C | GPL v2 |
| LedisDB | LedisDB is a NoSQL database written in Go. It is similar to Redis and implements redis protocol. ... | Key/Value | China | 2014 | Open Source | Go | MIT |
| LesbianDB | LesbianDB is a NoSQL document-oriented DBMS written in C#. | Document / XML | United States of America | 2022 | Hobby | C# | AGPL v3 |
| LevelDB | LevelDB is a key/value store built by Google. It can support an ordered mapping from string keys ... | Key/Value | United States of America | 2011 | Commercial | C++ | BSD |
| libmdbx | libmdbx is a embedded transactional key-value DBMS derived from LMDB. | Key/Value | Russia | 2015 | Open Source | OpenLDAP Public License | |
| libSQL | libSQL is a hard fork of SQLite. | Relational | United States of America | 2022 | Commercial, Open Source | C | MIT |
| LightCloud | LightCloud is a distributed and persistent key-value database. | Key/Value | Taiwan | 2009 | Open Source | Python | |
| LightDB | LightDB is a DBMS designed to ingest, store, and deliver virtual reality (VR) content. | Array / Matrix | United States of America | 2017 | Academic, Open Source | C++ | MIT |
| LightDB | LightDB is a document-oriented DBMS written in Python that natively stores JSON objects. | Document / XML | Kazakhstan | 2021 | Hobby, Open Source | Python | |
| LINCKS | LINCKS is an object-oriented database system developed for information system applications. The f... | Object-Oriented | Sweden | Academic | GPL v2 | ||
| LinDB | LinDB is a distributed time-series DBMS written in Go. It is optimized especially for real-time w... | Column Family / Wide-Column | China | 2019 | Open Source | Go | Apache v2 |
| LineairDB | LineairDB is an embeddable transactional key-value storage library. | Key/Value | Japan | 2020 | Open Source | C++ | Apache v2 |
| LingoDB | LingoDB is an experimental relational DBMS that uses the MLIR compiler framework to convert queri... | Relational | Germany | 2021 | Academic, Open Source | C++ | MIT |
| LintDB | LintDB (Late Interaction DB) is an embedded vector DBMS written for Python programs and based on ... | Vector | United States of America | 2024 | Open Source | C++ | Apache v2 |
| Linter | Linter is a general-purpose OLTP database | Relational | Russia | 1990 | Commercial | Proprietary | |
| LiteDB | LiteDB is a embedded document-oriented DBMS for .NET applications. | Document / XML | Brazil | 2014 | Open Source | C# | MIT |
| LittleD | Canada | Open Source | Apache v2 | ||||
| LlamaDB | Canada | 2015 | Open Source | Rust | MIT | ||
| LMDB | LMDB (Lightning Memory-Mapped Database) is a embedded database for key-value data based on B+tree... | Key/Value | Ireland | 2011 | Commercial, Open Source | C | OpenLDAP Public License |
| LNX-DBMS | Relational | Germany | Commercial | ||||
| LocalSQL | LocalSQL is an embedded relational DBMS that provides library and command line tool for executing... | Relational | United States of America | 2001 | Open Source | LGPL v2 | |
| LocustDB | LocustDB is an experimental, single-node engine for parallel execution of analytical queries. | Relational | United States of America | 2017 | Open Source | Rust | |
| LogicBlox | LogicBlox is a commercial deductive DBMS with a datalog query interface. | United States of America | Commercial | Proprietary | |||
| LokiJS | LokiJS is an in-memory, document-oriented JavaScript database. | Document / XML | Ireland | 2013 | Hobby, Open Source | JavaScript | |
| LonaDB | LonaDB is a document-oriented (JSON) DBMS written in PHP. | Document / XML | Germany | 2023 | Hobby, Open Source | PHP | AGPL v3 |
| LotusDB | LotusDB is a embedded, log-structured key-value DBMS written in Go. | Key/Value | China | 2021 | Hobby, Open Source | Go | Apache v2 |
| Lovefield | Lovefield is a relational DBMS designed to run in web browsers. | Relational | United States of America | 2014 | Open Source | JavaScript | Apache v2 |
| LowDB | Document / XML | 2014 | Open Source | JavaScript | MIT | ||
| Lucene | Lucene is an open-source embedded search engine software library. | Document / XML | United States of America | 1999 | Open Source | Java | Apache v2 |
| LucidDB | LucidDB is a DBMS optimized for business intelligence. Its architecture supports column-store, bi... | United States of America | 2004 | Commercial, Open Source | C++, Java | Apache v2, GPL v2, LGPL v2 | |
| LungoDB | LungoDB is a MongoDB-compatible embedded DBMS engine for Go applications. | Document / XML | Switzerland | 2019 | Open Source | Go | MIT |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| M3DB | M3DB is a distributed time series database developed for the M3 metrics platf... | Relational | United States of America | 2018 | Open Source | Go | Apache v2 |
| Machbase | Machbase is a time-series DBMS designed for IoT workloads. | Relational | South Korea | 2017 | Commercial | Proprietary | |
| madIS | madIS is an extensible relational database system built on top of SQLite with extensions implemen... | Relational | Greece | 2009 | Academic | Python | MIT |
| Magma | Magma is a multi-user object database designed for Squeak systems. | Object-Oriented | United States of America | 2002 | Open Source | Smalltalk | MIT |
| MammothDB | MammothDB is a distributed, relational OLAP DBMS that runs on the Apache Hadoop Distributed File ... | Relational | Bulgaria | 2012 | Commercial | Proprietary | |
| MangoDB | MangoDB is a parody DBMS of MongoDB. It supports the MongoDB wire protocol but all... | Document / XML | United States of America | 2012 | Hobby, Open Source | Python | |
| Manhattan | United States of America | 2014 | Internal / Non-Public | ||||
| Manticore Search | Manticore Search is a full-text search and analytical database. | Relational | United Kingdom | 2017 | Commercial, Open Source | C++ | GPL v2 |
| MapDB | MapDB is an open-source embedded Java database engine and collection framework. It provides Maps,... | Object-Oriented | Czechia | 2012 | Open Source | Java | Apache v2 |
| MapR-DB | MapR-DB was a commercial re-implementation of HBase designed to run in Hadoop clusters. | Column Family / Wide-Column | United States of America | 2012 | Commercial | Proprietary | |
| MarcelloDB | MarcelloDB is an embedded object-oriented DBMS for C# Windows applications. | Object-Oriented | Belgium | 2014 | Open Source | C# | MIT |
| MariaDB | MariaDB is a relational DBMS that started as a fork of MySQL. New features from MySQL are likely ... | Relational | Sweden | 2009 | Open Source | Bash, C, C++, Perl | GPL v2 |
| Mariposa | Mariposa was an experimental distributed database management system developed by Mike Stonebraker... | Relational | United States of America | 1994 | Academic, Open Source | BSD | |
| MarkLogic | MarkLogic is a multi-model DBMS that supports document (XML) and graph (RDF) data. | Document / XML, Triplestore / RDF | United States of America | 2001 | Commercial | Proprietary | |
| Marqo | Marqo is an multi-modal vector search engine. | Document / XML, Vector | Australia | 2022 | Commercial, Open Source | Python | Apache v2 |
| Materialize | Materialize is a streaming database. It ingests data from sources (i.e., Kafka, Postgres CDC), in... | Relational | United States of America | 2019 | Commercial | Rust | Business Source License |
| Matisse | Document / XML | France | 1986 | Commercial | Proprietary | ||
| MatrixOne | MatrixOne is an HTAP DBMS written in Go. | Relational | China | 2021 | Commercial, Open Source | Go | Apache v2 |
| MaxDB | MaxDB is a relational DBMS developed by SAP. | Relational | Germany | 1977 | Commercial | Proprietary | |
| mcdb | mcdb ("mmap constant database") is based on the cdb library for creating and reading constant (i.... | Key/Value | United States of America | 2010 | Hobby, Open Source | C | LGPL v2 |
| Mckoi SQL Database | Mckoi SQL Database is a relational DBMS written in Java. | Relational | United States of America | 1998 | Commercial, Open Source | Java | GPL v2 |
| MDBM | MDBM a memory-mapped key/value store. | Key/Value | United States of America | 2012 | Industrial Research | BSD | |
| MDBMS | MDBMS ("Marty's DBMS") was a relational DBMS developed in the late 1990s. | Relational | Netherlands | 1998 | Commercial | C | |
| Meilisearch | Meilisearch is a document-oriented search engine. | Document / XML | France | 2018 | Commercial, Open Source | Rust | MIT |
| Memcached | Memcached (pronunciation: mem-cash-dee) is a distributed in-memory key-value storage system, usua... | Key/Value | United States of America | 2003 | Commercial, Open Source | C | BSD |
| MemCP | MemCP is an in-memory columnar DBMS compatible with MySQL. | Relational | Germany | 2022 | Open Source | Go | GPL v3 |
| Memgraph | Memgraph is a native fully distributed in-memory graph database built to handle real-time use-cas... | Graph | United Kingdom | 2016 | Commercial, Open Source | C, C++ | Business Source License |
| Memstate | Memstate is a transactional in-memory object-oriented DBMS. It uses PostgreSQL or EventStore as i... | Object-Oriented | Sweden | 2017 | Commercial, Open Source | C# | GPL v3, LGPL v3 |
| Mentat | Project Mentat is a persistent, embedded knowledge base written in Rust. | Relational | United States of America | 2016 | Open Source | Rust | Apache v2 |
| MetalBase | MetalBase is a small relational database management system. It has all the pieces that a relation... | Relational | United States of America | Open Source | C | ||
| MillenniumDB | MillenniumDB is a graph-oriented database management system that supports SPARQL. | Graph, Triplestore / RDF | Chile | 2021 | C++ | GPL v2 | |
| Milvus | Milvus is a vector DBMS design to to store vectors generated by machine learning models and neura... | Vector | China | 2019 | Open Source | Go | Apache v2 |
| Mimer SQL | Mimer SQL is a relational DBMS developed by Mimer Information Technology AB. It is available acro... | Relational | Sweden | 1974 | Commercial | C | |
| Mimir | Mimir is an open-source time0series database to provide long-term storage for Prometheus. | Relational | United Kingdom | 2016 | Commercial, Open Source | Go | AGPL v3 |
| MLDB | MLDB is an open-source database designed for machine learning. | Canada | 2015 | Commercial, Open Source | C++ | Apache v2 | |
| Mnesia | Mnesia is a distributed relational DBMS written in the Erlang. | Relational | Finland | Open Source | Erlang | ||
| Model 204 | The Model 204 DBMS is a legacy system designed for IBM System z mainframes. | Entity-Attribute-Value | United States of America | 1965 | Commercial | Proprietary | |
| ModeShape | ModeShape is a hierarchical, transactional, and consistent data store with support for queries, f... | Object-Oriented | United States of America | 2008 | Commercial, Open Source | Java | Apache v2 |
| Mondrian | Mondrian is an OLAP query execution engine written in Java. | Relational | United States of America | 2002 | Commercial, Open Source | Java | Eclipse Public License |
| MonetDB | Column Family / Wide-Column | Netherlands | 2002 | Academic, Open Source | C | Mozilla Public License | |
| MongoDB | MongoDB is an open-source, cross-platform document-oriented DBMS store. It is a document database... | Document / XML | United States of America | 2009 | Commercial, Open Source | C++, JavaScript, Python | Server Side Public License |
| Mongrel | Mongrel is a serverless key-value database-as-a-service (DBaaS). | Key/Value | United States of America | 2021 | Commercial | Proprietary | |
| MonographDB | MonographDB is a propietary distributed DBMS based on MariaDB that uses a custom storage manager ... | Relational | China | 2021 | Commercial | Proprietary | |
| mSQL | mSQL (Mini SQL) is a relational DBMS from the 1990s. | Relational | Australia | 1994 | Commercial | C | Proprietary |
| MUFFIN | MUFFIN ("Mother Fucking Ingres") was a distributed database machine implementation of the INGRES ... | Relational | United States of America | 1979 | Academic | C | |
| Mulgara | Mulgara is a RDF DBMS written entirely in Java | Triplestore / RDF | United States of America | 2006 | Open Source | Java | Open Software License 3.0 |
| mutable | mutable is an academic DBMS designed to support rapid prototyping of research ideas while also ma... | Germany | 2019 | Academic, Open Source | |||
| mvBase | mvBase is a multi-dimensional database environment. | Multi-Value | United States of America | Commercial | Proprietary | ||
| MyScaleDB | MyScaleDB is a hard-fork of Clickhouse that adds vector search and full-text indexing using Tantivy. | Relational | China | 2021 | Commercial, Open Source | C++ | Apache v2 |
| MySQL | MySQL is an open-source relational database management system. MySQL is used in many web applicat... | Relational | Sweden | 1994 | Open Source | C, C++ | GPL v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Nanolat | Nanolat is an in-memory key/value store that supports PUT/GET/DEL and range search on cursors. |
Key/Value | South Korea | 2012 | Open Source | Apache v2 | |
| Napa | Napa is an internal DBMS developed at Google to support real-time analytical workloads. | Relational | United States of America | 2018 | Internal / Non-Public | C++ | Proprietary |
| NavDB | NavDB is a database with key-value and (experimental) relational models. | Relational, Key/Value | South Africa | 2017 | Commercial | C++ | Apache v2, Proprietary |
| NCache | NCache is a distributed cache for .NET and Java. It is an open source product released under the ... | Key/Value | United States of America | 2015 | Commercial, Open Source | Apache v2, Proprietary | |
| NDatabase | NDatabase is a object-oriented DBMS written in C# for the .NET environment. | Object-Oriented | Poland | Commercial, Open Source | C# | LGPL v2 | |
| NDB Cluster | NDB Cluster is a distributed DBMS that backs the MySQL Cluster product. It can be used independen... | Key/Value | Sweden | Commercial, Open Source | C++ | GPL v2 | |
| Nebula Graph | Nebula Graph is an open source distributed graph database system developed by VEsoft Inc. The goa... | Graph | China | 2018 | Open Source | C++ | Apache v2 |
| NeDB | NeDB is a lightweight embedded document DBMS written in JavaScript. It supports Node.js, nw.js, E... | Document / XML | France | 2013 | Open Source | JavaScript | MIT |
| NEO | NEO ("Nexedi Enterprise Object") is a distributed NoSQL DBMS that implements the ZODB API. | Document / XML | France | 2005 | Commercial, Open Source | Python | GPL v3 |
| Neo4j | Neo4j is a graph database that leverages data relationships as first-class entities. It provides ... | Graph | Sweden | 2007 | Commercial, Open Source | Java, Scala | AGPL v3, GPL v3 |
| NeoDatis ODB | NeoDatis ODB is a simple object-oriented DBMS. | Object-Oriented | Brazil | 2006 | Open Source | Java | GPL v2 |
| Neon | Neon is a serverless PostgreSQL service that separates storage and compute. | Object-Relational | United States of America | 2021 | Commercial, Open Source | C, Rust | Apache v2, PostgreSQL License |
| Neoview | The original Neoview data warehousing appliances were based on a cluster of Itanium processors. I... | Relational | United States of America | 2007 | Commercial | Proprietary | |
| Neptune | Amazon Neptune is a fully-managed graph database service used to work with highly connected datas... | Graph, Triplestore / RDF | United States of America | 2018 | Commercial | Proprietary | |
| nessDB | nessDB is an embedded key-value DBMS written in ANSI C with BSD license. It does not require any ... | Key/Value | China | 2011 | Open Source | C | BSD |
| Netezza | Relational | United States of America | 1999 | Commercial | Proprietary | ||
| NeuroDB | NeuroDB is a closed-source in-memory graph database engine. | Graph | China | 2020 | Commercial | Proprietary | |
| NexusDB | Relational | Australia | 2003 | Commercial | Delphi | Proprietary | |
| Nile | Nile is a serverless database service based on PostgreSQL. | Object-Relational | United States of America | 2022 | Commercial | Proprietary | |
| Ninja Database | Ninja Database is a suite of DBMS products: [Lite](https://kellermansoftware.com/products/ninja-d... | Relational, Object-Oriented | United States of America | Commercial | C# | Proprietary | |
| Nitrite | Nitrite is a NoSQL embedded document store written in Java. The name is derived from NOsql **... | Document / XML | India | 2017 | Hobby, Open Source | Java | Apache v2 |
| NoisePage | NoisePage is an in-memory relational DBMS designed to support self-driving (i.e., autonomous) ope... | Relational | United States of America | 2018 | Academic, Open Source | C++ | MIT |
| NoKV | NoKV is a Go-native log-structured key-value DBMS. | Key/Value | Australia | 2024 | Hobby, Open Source | Go | Apache v2 |
| Noms | Noms is a decentralized DBMS that follows the same philosophy of the Git version control system. | Document / XML | United States of America | 2015 | Open Source | Go | Apache v2 |
| NonStop SQL | NonStop SQL is a database management system designed for 24x7 availability, high scalability, and... | Relational | United States of America | 1987 | Commercial | C | Proprietary |
| NornicDB | NornicDB is a Neo4j-compatiable vector search engine. It supports GPU-accelerated nearest neighbo... | Graph | United States of America | 2025 | Hobby, Open Source | Go | MIT |
| NosDB | NosDB is an NoSQL DBMS for .NET applications. | Document / XML | United States of America | 2013 | Commercial, Open Source | C# | Apache v2 |
| NucliaDB | NucliaDB is a vector database. | Vector | Spain | 2021 | Commercial, Open Source | Python, Rust | AGPL v3 |
| NuDB | NuDB is an append-only key/value DBMS written in C++11 as a single header file. It is designed to... | Key/Value | United States of America | 2016 | Open Source | C++ | Boost Software License |
| NunDB | NunDB is a object-oriented DBMS designed to support real-time update propagation to clients. | Object-Oriented | Brazil | 2018 | Hobby, Open Source | Rust | MIT |
| NuoDB | NuoDB is a distributed relational database management system. Unlike traditional shared-disk or s... | Relational | United States of America | 2010 | Commercial | C++ | Proprietary |
| NutsDB | NutsDB is a transactional key/value store database written in Go. All transactions executed in Nu... | Key/Value | China | 2018 | Open Source | Go | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| O2 | O2 is an object-oriented DBMS developed in the 1990s. | Object-Oriented | France | 1990 | Commercial | ||
| OasysDB | OasysDB is a toy key-value DBMS based on Sled that supports vector search operations. | Key/Value, Vector | United States of America | 2023 | Hobby, Open Source | Rust | Apache v2 |
| ObjectBox | ObjectBox is an object-oriented DBMS library built for IoT, mobile, and embedded devices. It is a... | Object-Oriented | Germany | 2016 | Commercial, Open Source | C, C++, Go, Java, Python, Swift | Apache v2 |
| ObjectDatabase++ | ObjectDatabase++ (ODBPP) is an embeddable object-oriented database designed for server applicatio... | Object-Oriented | Australia | 2003 | Commercial | C++ | Proprietary |
| ObjectDB | ObjectDB is an embedded object database for Java that supports the JPA/JDO API. | Object-Oriented | United Kingdom | 2010 | Commercial | Java | Proprietary |
| Objectivity/DB | Objectivity/DB is an object-oriented DBMS. It allows applications to make standard C++, C#, Java,... | Object-Oriented | United States of America | 1990 | Commercial | Proprietary | |
| ObjectStore | ObjectStore is an embedded object-oriented DBMS. | Object-Oriented | United States of America | 1988 | Commercial | C++, Java | Proprietary |
| OceanBase | OceanBase is an open source distributed relational DBMS which is fully compatible with MySQL. It ... | Relational | China | 2010 | Commercial, Open Source | C++ | Mulan PubL v2 |
| Ocelot | Ocelot was a short-lived relational DBMS project from Canada. It was written for Windows using mo... | Relational | Canada | 2001 | Open Source | Assembly | GPL v2, Mozilla Public License |
| Ocient | Ocient is a distributed data warehouse DBMS that supports SQL. | Relational | United States of America | 2016 | Commercial | Proprietary | |
| OctaneDB | OctaneDB is an embedded vector DBMS for Python applications. | Vector | India | 2025 | Hobby, Open Source | Python | MIT |
| OctopusDB | OctopusDB is an academic project to build a DBMS that can automatically evolve its storage and ex... | Germany | 2010 | Academic | |||
| ODABA | ODABA is an object-oriented DBMS that supports a persistent programming language. | Object-Oriented | Germany | 1994 | Commercial, Open Source | C++ | GPL v2 |
| OlegDB | OlegDB is a free, open-source, NoSQL (Key-Value) DBMS. It was primarily written in C, with a Go f... | Key/Value | United States of America | 2014 | Commercial, Open Source | C, Go | MIT |
| OnceDB | OnceDB is a proprietary full-text search database based on Redis. | Document / XML | China | 2016 | Commercial | ||
| OneDB | OneDB is a hosted / rebranded cloud-based offering of Informix. | Relational | United States of America | 2020 | Commercial | Proprietary | |
| OpenBase SQL | OpenBase SQL is a relational database server software, originally developed for the OpenStep plat... | Relational | United States of America | 1991 | Commercial | Proprietary | |
| OpenEdge | United States of America | 1984 | Commercial | ||||
| openGemini | openGemini is an open-source time-series database management system that is compatible with the I... | Relational | China | 2022 | Open Source | Go | Apache v2 |
| OpenMLDB | OpenMLDB is a relational DBMS that purports to better support ML applications. | Relational | China | 2017 | Open Source | C++ | Apache v2 |
| OpenQM | OpenQM is an open-source multi-value database management system. | Multi-Value | United Kingdom | 1993 | Commercial, Open Source | GPL v2, Proprietary | |
| OpenTSDB | OpenTSDB is a distributed Time Series Database (TSDB) based on HBase. OpenTSDB was written by B... |
Key/Value | United States of America | 2010 | Open Source | Java | LGPL v2 |
| Opteryx | Opteryx is a embedded SQL query engine written in Python for processing data files. | Object-Relational | United Kingdom | 2021 | Hobby, Open Source | Python | Apache v2 |
| Oracle NoSQL | Oracle NoSQL Database (OND) is a distributed key-value DBMS. It use Berkeley DB (Java Edition) as... | Key/Value | United States of America | 2011 | Commercial, Open Source | Java | Apache v2, Proprietary |
| Oracle RDBMS | Oracle database, originally a relational DBMS, has evolved into a converged, multi-model DBMS, e.... | Relational, Key/Value, Document / XML, Graph, Triplestore / RDF | United States of America | 1977 | Commercial | C, C++ | Proprietary |
| OrbitDB | Conflict-free Replicated Data Types (CRDTs) are data structures whose network replicas can be upd... | Key/Value, Document / XML | Germany | 2015 | Open Source | JavaScript | MIT |
| OrientDB | OrientDB is a multi-model NoSQL DBMS that supports of graph, documents, key-value, and object-ori... | Key/Value, Document / XML, Graph, Object-Oriented | United Kingdom | 2010 | Commercial, Open Source | Java | Apache v2 |
| OrioleDB | OrioleDB is a fork of PostgreSQL that provides a new storage engine. | Object-Relational | Belarus | 2021 | Commercial, Open Source | C | PostgreSQL License |
| OSIsoft PI | United States of America | Commercial | |||||
| OushuDB | Oushu Database (OushuDB) is a proprietary enhanced fork of HAWQ. | Relational | China | 2016 | Commercial | ||
| Ovrimos | Relational DBMS with a built-in web server. | Greece | 1996 | Commercial | |||
| Oxia | Oxia is a distributed metadata (key/value) database management system. | Key/Value | United States of America | 2021 | Commercial, Open Source | Go | Apache v2 |
| OxidSQL | OxidSQL is a toy relational DBMS written in Rust. | Relational | Germany | 2022 | Educational, Hobby | Rust | Apache v2 |
| Oxla | Oxla is a distributed cloud DBMS designed for OLAP workloads. | Relational | Poland | 2020 | Commercial | Proprietary |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| P*TIME | P*TIME ("Parallel* Transact-In-Memory Engine") is an in-memory relational database management s... | Relational | South Korea | 2000 | Commercial | Proprietary | |
| Pail | Pail is a sharded key-value store that runs on top of IPFS. | Key/Value | United Kingdom | 2022 | Open Source | JavaScript | Apache v2, MIT |
| PalDB | PalDB is an embedded key/value store DBMS written in Java that supports write-only semantics. | Key/Value | United States of America | 2015 | Open Source | Java | Apache v2 |
| PancakeDB | PancakeDB is a columnar DBMS that supports batch query processing for OLAP workloads. | United States of America | 2021 | Commercial | Proprietary | ||
| Paper | Paper is an embedded object-oriented storage engine on Android with automatic schema migration su... | Key/Value, Object-Oriented | Sweden | 2015 | Open Source | Java | Apache v2 |
| ParAccel | ParAccel was a distributed relational DBMS based on PostgreSQL. It used a shared-nothing architec... | Relational | United States of America | 2006 | Commercial | C | Proprietary |
| ParadeDB | ParadeDB is analytical DBMS built on top of PostgreSQL. It installs extensions into PostgreSQL th... | Object-Relational | United States of America | 2023 | Commercial, Open Source | Rust | AGPL v3 |
| Paradise | Paradise was a research database system aimed at handling GIS types of applications. | Object-Oriented | United States of America | 1994 | Academic | C++ | |
| Paradox | Paradox is a relational DBMS designed to run desktop applications. | Relational | United States of America | 1985 | Commercial | Proprietary | |
| ParStream | ParStream is a columnar OLAP DBMS that supports GPU acceleration. | Relational | Germany | 2010 | Commercial | C++ | Proprietary |
| PearlDB | PearlDB is a lightweight durable HTTP key-value DBMS written in C. | Key/Value | New Zealand | 2015 | Hobby, Open Source | C | BSD |
| Pebble | Pebble is a key-value store written in Go and developed by Cockroach Labs. It is based on an unfi... | Key/Value | United States of America | 2018 | Open Source | Go | BSD |
| Percona Server | Percona Server is a branch of MySQL enhanced with additional features. | Relational | United States of America | 2006 | Commercial, Open Source | ||
| Perst | Perst is an open source, dual license, object-oriented embedded database system (ODBMS). It is av... | Object-Oriented | Russia | 2003 | Open Source | Java | GPL v3, Proprietary |
| Pervasive PSQL | Relational, Key/Value | United States of America | 1996 | Commercial | |||
| Peterlee Relational Test Vehicle | The "Peterlee Relational Test Vehicle" (PRTV) was an experimental relational DBMS developed at th... | Relational | United Kingdom | 1970 | Industrial Research | Proprietary | |
| Phoenix | Phoenix is a middleware layer that provides support for SQL-based OLTP workloads on top of HBase. | Relational | United States of America | 2014 | Open Source | Java | Apache v2 |
| PhotonDB | PhotonDB is an experimental key/value DBMS written in Rust. | Key/Value | China | 2022 | Hobby, Open Source | Rust | Apache v2 |
| pickleDB | pickleDB is a lightweight key-value DBMS written in Python. It writes data formatted as plain tex... | Document / XML | United States of America | 2011 | Hobby, Open Source | Python | BSD |
| PicoDB | PicoDB is an in-memory, document-oriented (JSON) DBMS that runs in Node.js and browsers. It suppo... | Document / XML | France | 2016 | Open Source | JavaScript | MIT |
| picoSQL | picoSQL is a disk-oriented, relational DBMS that supports SQL. | Relational | Italy | 1995 | Commercial, Open Source | GPL v2 | |
| PieCloudDB | PieCloudDB is a cloud-native OLAP DBMS database. It supports both IaaS and bare metal deployments. | Relational | China | 2021 | Commercial | Assembly, Bash, C, C++, Go, Java, Perl, PL/SQL, Python, R, SQL | Proprietary |
| Pika | Pika is a C++ clone of Redis that uses RocksDB as its storage backend. | Key/Value | China | 2014 | Open Source | C++ | MIT |
| piladb | piladb is a lightweight RESTful database engine based on stack data structures. | Object-Oriented | Spain | 2015 | Open Source | Go | MIT |
| Pilosa | Pilosa is a distributed DBMS that only supports bitmap indexes. | Vector | United States of America | 2017 | Commercial, Open Source | Go | Apache v2 |
| Pincaster | Pincaster is an in-memory DBMS designed for geographic and document data. | Document / XML | France | 2010 | Open Source | C | MIT |
| Pinecone | Pinecone is a managed DBMS designed for storing and querying vectors using approximate nearest ne... | Vector | United States of America | 2019 | Commercial | Proprietary | |
| Pinot | Pinot is an open-source distributed relational OLAP database management system written by LinkedI... | Relational | United States of America | 2014 | Open Source | Java | Apache v2 |
| PinusDB | PinusDB ("Pinecone Database") is a time-series DBMS designed for IoT data sets. | Relational | China | 2019 | Open Source | C++ | GPL v3 |
| PipelineDB | PipelineDB was a PostgreSQL extension that provide continuous query execution for time-series agg... | Object-Relational | United States of America | 2013 | Commercial, Open Source | C | BSD, GPL v3 |
| PlanetScale | PlanetScale is a database-as-a-service cloud offering based on the Vitess MySQL sharding infrastr... | Relational | United States of America | 2018 | Commercial | Proprietary | |
| PNUTS | United States of America | 2008 | Industrial Research | ||||
| PocketBase | PocketBase is a self-hosted real-time database service backed by SQLite. | Relational | Bulgaria | 2022 | Hobby, Open Source | Go | MIT |
| pocketSQL | United States of America | 2001 | Open Source | C | GPL v2 | ||
| Pogreb | Pogreb is an embedded key-value store written in Go and designed for read-heavy workloads. | Key/Value | United States of America | 2018 | Open Source | Go | Apache v2 |
| PointBase | Relational | United States of America | 1998 | Commercial | Java | ||
| PolarDB | PolarDB is a commercial cloud based relational database product developed by the Alibaba. It is d... | Relational | China | 2017 | Commercial | Proprietary | |
| Polars | Polars is an embedded query engine library for processing DataFrames. | Netherlands | 2020 | Commercial, Open Source | Rust | MIT | |
| PoloDB | PoloDB embedded document-oriented (JSON) DBMS written in Rust. | Document / XML | China | 2020 | Hobby, Open Source | Rust | Apache v2 |
| Polybase | Polybase is a document-oriented DBMS that stores data on a blockchain. | Document / XML | United States of America | 2022 | Commercial | Rust | Proprietary |
| Polyhedra | Polyhedra is an in-memory database management system. It uses an Object-Relational data model, bu... | Object-Relational | United Kingdom | 1994 | Commercial | C++ | Proprietary |
| Polypheny | Polypheny is a multi-model DBMS built on top of HSQLDB. The DBMS supports the relat... | Relational, Document / XML, Graph | Switzerland | 2017 | Academic, Commercial, Open Source | Java | Apache v2 |
| PosDB | PosDB is a distributed disk-based column-store that leverages late materialization for analytical... | Relational | Russia | 2017 | Industrial Research | C++ | GPL v2 |
| PostgreSQL | PostgreSQL is an object-relational database based on Postgres, developed from University of Calif... | Object-Relational | United States of America | 1986 | Academic, Open Source | C | PostgreSQL License |
| PouchDB | PouchDB is a free and open-source JavaScript DBMS inspired by Apache CouchDB (document-oriented N... | Document / XML | United States of America | 2010 | Open Source | JavaScript | Apache v2 |
| PranaDB | PranaDB is a distributed streaming DBMS that supports ingestion from Kafka topics. | Relational | United Kingdom | 2022 | Open Source | Go | |
| Predator | Predactor was an academic object-relational DBMS developed at Cornell University during the 2000s... | Object-Relational | United States of America | 1996 | Academic, Open Source | GPL v2 | |
| PrestoDB | PrestoDB is an open source distributed SQL query engine for running interactive analytic queries ... | Column Family / Wide-Column, Relational, Key/Value, Document / XML | United States of America | 2013 | Open Source | Java | Apache v2 |
| PrimeBase | Relational | Germany | Commercial | Proprietary | |||
| PRISMA | PRISMA is purported to be the first distributed in-memory DBMS developed by the team that later w... | Relational | Netherlands | 1986 | Academic | ||
| ProfaneDB | ProfaneDB is a object-oriented DBMS that natively stores Google Protocol Buffers data. | Object-Oriented | Switzerland | 2017 | Hobby, Open Source | C++ | GPL v3 |
| Prometheus | Prometheus is an open-source time series database developed by SoundCloud, and serves as the stor... | Key/Value | Germany | 2012 | Open Source | Go | Apache v2 |
| Proteus | Proteus is an academic database engine designed for modern hardware. | Relational | Switzerland | 2015 | Academic | Proprietary | |
| Proton | Proton is a unified streaming and historical data processing engine built on ClickHouse. | Relational | United States of America | 2021 | Commercial, Open Source | C++ | Apache v2 |
| ProtonBase | ProtonBase is a proprietary OLAP DBMS. | Relational, Document / XML | China | 2021 | Commercial | Proprietary | |
| ProvenDB | ProvenDB is a middleware layer that provides a MongoDB-compatible interface on top of a blockchai... | Document / XML | Australia | 2018 | Commercial | Proprietary | |
| PuffinDB | PuffinDB is a hosted lakehouse query engine based on DuckDB | Relational | Croatia | 2023 | Open Source | Proprietary | |
| PumpkinDB | PumpkinDB is a low-level event sourcing database engine that is ACID-compliant. It is a database ... | Key/Value | Canada | 2017 | Open Source | Rust | Mozilla Public License |
| PupDB | PupDB is a file-based key-value DBMS with a REST API written in Python. | Key/Value | India | 2019 | Open Source | Python | MIT |
| PysonDB | PysonDB is an embedded document-oriented DBMS for Python applications. | Document / XML | India | 2020 | Hobby, Open Source | Python | MIT |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Qdrant | Qdrant is a vector-oriented DBMS. | Vector | Germany | 2020 | Commercial | Rust | Apache v2 |
| qikkDB | qikkDB is a GPU-accelerated columnar relational DBMS. | Relational | Slovakia | 2019 | Commercial, Open Source | C++ | Apache v2 |
| Qizx | Qizx is a proprietary XML database that supports XQuery and XPath. | Document / XML | France | 2004 | Commercial | Proprietary | |
| ql | ql is an embedded relational DBMS written in Go. | Relational | Poland | 2013 | Hobby, Open Source | Go | BSD |
| QLDB | Amazon Quantum Ledger Database (QLDB) is a managed ledger database management system. Its core st... | Document / XML | United States of America | 2018 | Commercial | Proprietary | |
| Qserv | Qserv is distributed database service developed for the [Large Synoptic Survey Telescope](http://... | Relational | United States of America | 2011 | Academic, Open Source | C++ | |
| Quadcap Embeddable Database | The Quadcap Embeddable Database (QED) is a pure Java implementation of a SQL92 RDBMS and JDBC dri... | Relational | United States of America | 1999 | Commercial | Java | |
| Quadrable | Quadrable (quadb) is an embedded multi-versioned DBMS engine that uses Merkle trees. | Key/Value | Canada | 2020 | Commercial, Open Source | C++ | BSD |
| quasardb | QuasarDB is a high-performance, distributed, column-oriented database with native time series sup... | Key/Value | France | 2008 | Commercial | C++ | Proprietary |
| QuestDB | QuestDB is an open-source time-series relational database. It uses a column-oriented approach and... | Relational | United Kingdom | 2014 | Commercial, Open Source | C++, Java | Apache v2 |
| Quickstep | Relational | United States of America | 2013 | Academic, Open Source | Apache v2 | ||
| Quickwit | Quickwit is a search engine for cloud-based object stores (e.g., Amazon S3). It uses Tantivy to c... | Document / XML | United States of America | 2021 | Commercial, Open Source | Rust | AGPL v3 |
| QuineDB | QuineDB is a quine that is also a key/value st... | Key/Value | United States of America | 2016 | Open Source | Bash | Eclipse Public License |
| Quokka | Quokka is a distributed query execution engine written in Python. | Relational | United States of America | 2021 | Hobby, Open Source | Python | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| R:BASE | Relational | United States of America | 1981 | Commercial | Proprietary | ||
| RadonDB | RadonDB is an open-source distribution layer for hosting MySQL in a cloud environment. | Relational | China | 2018 | Commercial, Open Source | Go | GPL v3 |
| RageDB | RageDB is an in-memory, distributed graph DBMS. | Graph | United States of America | 2021 | Hobby, Open Source | C++ | Apache v2 |
| RaimaDB | RaimaDB is an embedded, cross-platform, small-footprint, in-memory database developed for the IoT... | Relational, Network | United States of America | 1984 | Commercial | C++ | |
| RainStor | United Kingdom | 2004 | Commercial | ||||
| RamSQL | RamSQL is an embedded in-memory SQL DBMS designed for ephemeral databases in testing scenarios. | Relational | France | 2014 | Hobby, Open Source | Go | BSD |
| Raphtory | Raphtory is an in-memory graph DBMS designed for analytical workloads. | Graph | United Kingdom | 2020 | Open Source | Rust | GPL v3 |
| RapidsDB | RapidsDB is federated DBMS middleware with an in-memory OLAP execution engine. It provides a sing... | China | 2014 | Commercial | Proprietary | ||
| RaptorDB | RaptorDB is a document-oriented database for the .NET environment. | Document / XML | United Kingdom | 2012 | Open Source | C# | Code Project Open License |
| Rasdaman | Rasdaman ("raster data manager") is an array / datacube storage and query engine. Rasdaman engine... | Array / Matrix | Germany | 1989 | Commercial, Open Source | C++ | GPL v3 |
| RavenDB | RavenDB is a full-transactional NoSQL ACID-compliant database and is developed by Hibernating Rhi... | Key/Value, Document / XML | Israel | 2009 | Commercial, Open Source | C# | AGPL v3 |
| RayforceDB | RayforceDB is an columnar DBMS that uses a custom query Lisp language. | Relational | Ukraine | 2023 | Open Source | C | MIT |
| Rdb/VMS | Relational | United States of America | 1984 | Commercial | Proprietary | ||
| RDBMS | Relational | United States of America | 1974 | Academic | |||
| RDFox | RDFox is an-in-memory RDF-based DBMS. | Triplestore / RDF | United Kingdom | Commercial | Proprietary | ||
| ReadySet | ReadySet is a SQL-level caching middleware for PostgreSQL and MySQL. | Relational | United States of America | 2020 | Commercial | Rust | Business Source License |
| Reality | United Kingdom | 1973 | Commercial | Proprietary | |||
| Realm | Realm is an open-source and object-oriented DBMS designed for the mobile devices. It supports mul... | Object-Oriented | United States of America | 2011 | Commercial, Open Source | C++ | Apache v2 |
| Red Brick | United States of America | 1990 | Commercial | Proprietary | |||
| redb | redb is an embedded key-value DBMS written in Rust that uses MMAP. | Key/Value | United States of America | 2018 | Hobby, Open Source | Rust | Apache v2 |
| Redcon | Redcon is a Redis-compatible DBMS written in Go. | Key/Value | United States of America | 2016 | Hobby, Open Source | Go | MIT |
| RedDatabase | RedDatabase is a commercial fork of Firebird with additional features. | Relational | Russia | 2006 | Commercial | Proprietary | |
| Redict | Redict is a hard-fork of the Redis NoSQL DBMS. | Key/Value | Netherlands | 2024 | Open Source | C | LGPL v3 |
| Redis | Redis ("REmote DIctionary Server") is a networked, in-memory, key-value store that can be used as... | Key/Value | Italy | 2009 | Commercial, Open Source | C | BSD |
| RedisGraph | RedisGraph is a graph database built on Redis. It is a Redis module t... | Graph | United States of America | 2018 | Commercial, Open Source | C | Server Side Public License |
| RediSQL | RediSQL is a SQL execution layer on top of Redis. | Relational | Italy | 2016 | Commercial, Open Source | Rust | AGPL v3 |
| RedixDB | RedixDB is a clone of Redis written in Go with a pluggable storage manager API. | Key/Value | Egypt | 2018 | Hobby, Open Source | Go | |
| Redshift | Amazon Redshift is a data warehouse product developed by Amazon and is a part of Amazon's cloud p... | Relational | United States of America | 2012 | Commercial | C, C++ | Proprietary |
| RedStore | RedStore is a RDF triplestore DBMS written in C. | Triplestore / RDF | United Kingdom | 2009 | Open Source | C | GPL v3 |
| ReductStore | ReductStore is a time-series database designed specifically for blob data, written in C++ and Rust. | Key/Value | Germany | 2021 | Commercial, Open Source | C++, Rust | Mozilla Public License |
| Redwood | Redwood is a peer-to-peer DBMS. | Key/Value | United States of America | 2019 | Hobby, Open Source | Go | MIT |
| RefineDB | RefineDB is document DBMS that runs on top of FoundationDB. | Document / XML | China | 2021 | Hobby, Open Source | Rust | MIT |
| Regatta | Regatta is a proprietary cloud data warehouse HTAP DBMS designed to support both transactional an... | Relational | Israel | 2020 | Commercial | Proprietary | |
| Rel | Rel is a free, open-source, true relational database management system with an advanced query lan... | Relational | United Kingdom | 2004 | Academic, Educational, Open Source | Java | Apache v2 |
| RelationalAI | RelationalAI is a cloud-native knowledge graph database system. | Relational, Graph | United States of America | 2018 | Commercial | Julia | Proprietary |
| RelationalCloud | Relational | United States of America | 2010 | Academic | |||
| Relatude.DB | Relatude.DB is an C#-native graph-oriented DBMS designed for web applications (e.g., content mana... | Graph, Object-Oriented | Norway | 2025 | Open Source | C# | MIT |
| Relaxo | Relaxo is a transactional document database built on top of git. | Document / XML | New Zealand | 2012 | Hobby, Open Source | Ruby | MIT |
| ResilientDB | ResilientDB is a blockchain DBMS. | Document / XML | United States of America | 2019 | Academic, Open Source | C++ | Apache v2 |
| Resin Cache | United States of America | 1998 | Commercial, Open Source | Java | Proprietary | ||
| RethinkDB | RethinkDB is an open-source JSON database management system written in C++. It is intended for th... | Document / XML | United States of America | 2009 | Open Source | Bash, C++, Java, JavaScript, Python | Apache v2 |
| RexDB | RexDB is an integrated registry data management platform created by Prometheus Research, LLC, aim... | Object-Relational | United States of America | 2006 | Open Source | JavaScript, Python | AGPL v3 |
| RhizomeDB | RhizomeDB is a local-first DBMS based on CRDTs over IPFS. | Relational | United States of America | 2022 | Open Source | Rust | Apache v2, MIT |
| Riak | Riak is a distributed key-value store DBMS. | Key/Value | United States of America | 2010 | Commercial, Open Source | Erlang | Apache v2 |
| RisingLight | RisingLight is an educational OLAP DBMS written in Rust. | Relational | United States of America | 2021 | Educational, Open Source | Rust | Apache v2 |
| RisingWave | RisingWave is an open-source distributed streaming database targeting real-time analytics and eve... | Relational | United States of America | 2021 | Commercial, Open Source | Rust | Apache v2 |
| Rockall-DB | Rockall-DB is an C++ library that provides an embedded transactional DBMS similar to software-tra... | United Kingdom | Commercial | C++ | Proprietary | ||
| RocksDB | RocksDB is an embedded database using [key-val... | Key/Value | United States of America | 2012 | Open Source | C, C++ | Apache v2 |
| Rockset | Rockset is a cloud-based search and analytics database-as-a-service offering. | Relational | United States of America | 2016 | Commercial | C++ | Proprietary |
| ROMA | Roma is a decentralized distributed key-value store written in Ruby that is designed to be compat... | Key/Value | Japan | 2009 | Commercial, Open Source | Ruby | |
| RonDB | RonDB is a distributed key-value store that supports. It based on a fork of [MySQL NDB Cluster](/... | Relational, Key/Value | Sweden | 2020 | Open Source | C++ | GPL v2 |
| Rosebase | Rosebase was an early SQL DBMS from the 1990s. It was designed to support NeXTSTEP applications w... | Relational | United States of America | 1992 | Commercial | Objective-C | Proprietary |
| RoseDB | RoseDB is a key-value DBMS that is compatible with the Redis wire protocol. | Key/Value | China | 2020 | Hobby, Open Source | Go | MIT |
| rqlite | rqlite is a lightweight, distributed DBMS which uses SQLite as its sto... | Relational | United States of America | 2014 | Open Source | Go | MIT |
| RubatoDB | RubatoDB is an academic database project started by Dr. Li-Yan Yuan at University of Alberta, Can... | Key/Value | Canada | 2014 | Academic | ||
| RudraDB | RudraDB is a proprietary document-oriented DBMS with vector search support. | Document / XML, Vector | United States of America | 2025 | Commercial | Proprietary | |
| RxDB | RxDB is an offline-first database for storing JSON documents. It uses PouchDB or LokiJS as its ba... | Document / XML | Germany | 2016 | Open Source | JavaScript | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| SableDb | SableDb is a NoSQL key-value store DBMS that supports the Redis wire protocol. | Key/Value | Israel | 2024 | Hobby, Open Source | Rust | BSD |
| Sadas Engine | Relational | Italy | Commercial | Proprietary | |||
| SapphireDb | SapphireDb is a object-oriented DBMS designed for ASP.net and JavaScript applications. | Object-Oriented | Germany | 2018 | Hobby, Open Source | C# | MIT |
| Scalaris | Key/Value | Germany | Academic, Open Source | Erlang | Apache v2 | ||
| ScaleBase | United States of America | 2009 | Commercial | ||||
| ScaleDB | ScaleDB was a shared-disk storage manager for MySQL. | United States of America | 2005 | Commercial | Proprietary | ||
| ScaleOut StateServer | ScaleOut StateServer is an in-memory distributed cache. | Key/Value | United States of America | 2005 | Commercial | C | Proprietary |
| ScalienDB | ScalienDB was a distributed key/value store DBMS that supported transactions developed in the ear... | Key/Value | Hungary | 2010 | Commercial, Open Source | C++ | AGPL v3 |
| SchemafreeSQL | SchemafreeSQL is a document-oriented cloud-based DBMS that supports SQL. | Document / XML | United States of America | 2012 | Commercial | ||
| SchoonerSQL | SchoonerSQL was a repackaged MySQL distribution that used a proprietary fork of the InnoDB storag... | Relational | United States of America | 2007 | Commercial | C++ | Proprietary |
| SciDB | SciDB is a multi-dimensional array DBMS designed for scientific workloads and data sets. | Array / Matrix | United States of America | 2008 | Academic, Commercial, Open Source | C++ | AGPL v3, Proprietary |
| ScimoreDB | ScimoreDB is a relational distributed database for Windows that runs on commodity hardware. It is... | Relational | Denmark | 2005 | Commercial | Proprietary | |
| ScopeDB | ScopeDB is a propietary DBMS written in Rust. | Relational | China | 2024 | Commercial | Rust | Proprietary |
| ScratchDB | ScratchDB is a middleware that provides a hosted ClickHouse service. | Document / XML | United States of America | 2023 | Commercial, Open Source | Go | AGPL v3 |
| Scuba | Scuba is a distributed in-memory database built at Facebook. It is a time-series data analysis da... | Relational | United States of America | 2013 | Internal / Non-Public | Proprietary | |
| Scylla | ScyllaDB is an open-source distributed wide-column NoSQL database offering high availability, sca... | Column Family / Wide-Column, Key/Value | Israel | 2014 | Commercial, Open Source | C++ | AGPL v3 |
| SDB | SDB ("string database") is a key/value, embedded database engine based on the cdb disk... | Relational, Document / XML | Spain | Open Source | C | MIT | |
| SDD-1 | United States of America | Industrial Research | |||||
| Seafowl | Seafowl is an analytical database. | Relational | United Kingdom | 2022 | Commercial, Open Source | Rust | Apache v2 |
| SearchBlox | United States of America | 2003 | Commercial | ||||
| Sedna | Sedna is an XML database management system that supports XQuery. | Document / XML | Russia | 2003 | Academic, Open Source | C++ | Apache v2 |
| SenseiDB | SenseiDB is a distributed database that supports the backend of LinkedIn homepage and LinkedIn Si... | Relational | United States of America | 2012 | Open Source | Java | Apache v2 |
| Sequins | Key/Value | United States of America | 2014 | Open Source | Go | MIT | |
| SequoiaDB | SequoiaDB is a distributed relational database with a storage layer and a computing layer. The st... | Document / XML | China | 2011 | Commercial, Open Source | C++ | AGPL v3 |
| SereneDB | SereneDB is a search analytics database designed for real-time online analytical processing workl... | Relational | Germany | 2024 | Commercial | C++ | Apache v2 |
| Serenity | Serenity implements basic Redis commands and extends them with support of Consistent Cursors, ACI... | Russia | 2015 | Hobby, Open Source | C | ||
| Sesame | Triplestore / RDF | Netherlands | 1997 | Open Source | Java | BSD | |
| ShannonBase | ShannonBase is a repackaged MySQL DBMS that uses a fractured mirror approach with a custom in-mem... | Relational, Vector | China | 2024 | Commercial, Open Source | C++ | GPL v2 |
| ShardingSphere | Apache ShardingSphere is positioned as a Database Plus, and aims at building a new criterion and ... | Relational | China | 2016 | Open Source | Java | Apache v2 |
| ShareBase | United States of America | 1979 | Commercial | Proprietary | |||
| SharedDB | SharedDB is a relational database that is designed to handle large and complex transactional and ... | Relational | Switzerland | 2012 | Academic | ||
| Shore | United States of America | Academic, Open Source | |||||
| Shore-MT | Shore-MT is a multi-threaded version of the Shore storage manager developed at Carne... | United States of America | 2007 | Commercial, Open Source | C | ||
| shsql | shsql is a command-line SQL DBMS that stores data in flat files. | Relational | 2002 | Open Source | Bash | GPL v2 | |
| Siaqodb | Siaqodb is a NoSQL embedded document-oriented DBMS designed for .NET environments. | Document / XML | United States of America | Commercial | C# | ||
| SignalDB | SignalDB is an embedded JavaScript DBMS inspired by MongoDB. | Document / XML | Germany | 2023 | Hobby, Open Source | TypeScript | MIT |
| Silo | Silo is an in-memory database system. Silo tries to avoid all kinds of contention points by using... | Relational | United States of America | 2013 | Academic, Open Source | C++, Python | MIT |
| SimpleDB | SimpleDB is a distributed NoSQL database. It provides simple querying of structured data and requ... | Key/Value | United States of America | 2007 | Commercial | Erlang | Proprietary |
| SingleStore | SingleStore is a distributed, cloud-native database that can handle transactional and analytical ... | Relational, Key/Value, Document / XML, Object-Oriented, Multi-Value, Vector | United States of America | 2011 | Commercial | C++ | Proprietary |
| Siodb | Siodb is a SQL relational DBMS that supports end-to-end encryption. | Relational | Switzerland | 2018 | Commercial | C++ | |
| Sir.DB | Sir.DB is a document-oriented DBMS that organizes JSON documents on the local filesystem. | Document / XML | Hong Kong | 2020 | Hobby, Open Source | JavaScript | MIT |
| SiriDB | SiriDB is a time-series DBMS. | Netherlands | 2016 | Commercial, Open Source | C | MIT | |
| Sirius | Sirius is a GPU-native query engine that integrates with DuckDB via the standard Substrait query ... | Relational | United States of America | 2024 | Open Source | C++ | Apache v2 |
| SirixDB | Sirix is a log-structured XML database system with copy-on-write semantics. | Document / XML | Germany | 2012 | Academic, Open Source | Java, Kotlin | BSD |
| SKDB | SKDB is a relational DBMS that support continuous query execution with notifications. | Relational | United States of America | 2022 | Commercial | Skip | MIT |
| SkeletonDB | SkeletonDB is a lock-less, thread-safe in memory MVCC database storage engine written in Go. | Canada | 2016 | Open Source | Go | MIT | |
| SKSQL | SKSQL is a relational database engine designed for Node.js. | Relational | Spain | 2021 | Hobby, Open Source | TypeScript | MIT |
| SkyDB | Sky is designed for analytics on behavioral data (e.g., clickstream and log data). | United States of America | 2013 | Open Source | |||
| Skyrise | Skyrise is a serverless query processor for interactive in-situ analytics on cold data in cloud s... | Relational | Germany | 2019 | Academic, Open Source | C++ | MIT |
| Skytable | Skytable is a key-value DBMS written in Rust. | Key/Value | United States of America | 2020 | Open Source | Rust | AGPL v3 |
| SlateDB | SlateDB is an embedded key-value DBMS designed to for object stores. Its storage architecture is ... | Key/Value | United States of America | 2024 | Hobby, Open Source | Rust | Apache v2 |
| Sled | Sled is an embedded key-value store written in Rust. It provides atomic single-key operations, in... | Key/Value | Germany | 2016 | Open Source | Rust | Apache v2, MIT |
| SleekDB | SleekDB is a NoSQL database written in PHP that stores data in plain JSON files. | Document / XML | Bangladesh | 2018 | Open Source | PHP | MIT |
| SlicingDice | SlicingDice is an analytical database-as-a-service. | Brazil | 2015 | Commercial | Java | Proprietary | |
| Slumber DB | The JSON database for REST and Websocket storage | Key/Value | United States of America | 2014 | Open Source | Java | Apache v2 |
| SlyceIO | SlyceIO is a document-oriented database-as-a-service offering. | Document / XML | United Kingdom | 2023 | Commercial | Proprietary | |
| SmallSQL | SmallSQL is a German desktop-oriented database engine. SmallSQL is built upon the belief that dat... | Relational | Germany | 2005 | Open Source | Java | LGPL v3 |
| Sneller | Sneller is a vectorized SQL query engine for JSON datafiles on cloud storage. | Document / XML | United States of America | 2022 | Commercial, Open Source | Go | AGPL v3 |
| Snowflake | Snowflake is a cloud-based database and is currently offered as a pay-as-you-go service in the Am... | Relational, Document / XML | United States of America | 2013 | Commercial | C++, Java | Proprietary |
| solidDB | solidDB is a relational "SQL Database" with persistent in-memory - and on-disk tables. It provide... | Relational | Finland | 1992 | Commercial | C, Java | Proprietary |
| Solr | Solr is an open source NoSQL enterprise search platform built on Apache Lucene. Supporting distri... | Document / XML | United States of America | 2004 | Open Source | Java | Apache v2 |
| sones GraphDB | sones GraphDB was a graph database system developed in Germany. | Graph | Germany | 2007 | Commercial, Open Source | C# | AGPL v3 |
| Sonnerie | Sonnerie is a transactional time-series DBMS written in Rust. | Relational | United States of America | Open Source | Rust | BSD | |
| Sophia | Russia | BSD | |||||
| SpaceTime | SpaceTime is a relational DBMS designed for spatiotemporal analytical workloads. | Relational | Croatia | 2020 | Commercial | C++ | Proprietary |
| SpacetimeDB | SpacetimeDB is a relational DBMS that supports executing application logic as stored procedures. | Relational | United States of America | 2023 | Commercial, Open Source | Business Source License | |
| Spark SQL | Spark SQL works as a module in Apache Spark to integrate relational processing with Spark's API. ... | United States of America | 2014 | Open Source | Apache v2 | ||
| SparkleDB | Graph | Norway | Commercial | Proprietary | |||
| Sparksee | Sparksee is a high performance native graph database management system developed by Sparsity Tech... | Graph, Object-Oriented | Spain | 2006 | Commercial, Open Source | C++ | |
| SparrowDB | SparrowDB is an append-only object database that supports server-side image processing. | Key/Value | Brazil | 2016 | Open Source | Go | MIT |
| Speedb | Speedb is an embedded key/value storage engine based on RocksDB. | Key/Value | Israel | 2020 | Commercial | Proprietary | |
| Speedy | Speedy was an in-memory relational embedded DBMS that supported SQL. | Relational | Austria | Hobby, Open Source | C | ||
| Sphinx | Sphinx is a standalone full-text search engine whose goal is to provide fast and relevant full-te... | United States of America | 2001 | Commercial, Open Source | C++ | GPL v2 | |
| SpiceDB | SpiceDB is a DBMS middleware for managing fine-grained permissions on top of relational DBMSs. | Object-Oriented | United States of America | 2021 | Commercial, Open Source | Go | Apache v2 |
| Splice Machine | Splice Machine (also called SpliceSQL) is a SQL DBMS built on top of HBase and SparkSQL. All quer... | United States of America | 2012 | Commercial, Open Source | Java | AGPL v3 | |
| SplinterDB | SplinterDB is an embedded key-value DBMS from VMware Research. | Key/Value | United States of America | 2018 | Industrial Research, Open Source | C | Apache v2 |
| Splunk | Splunk is a database system designed for extracting structure and analyzing machine-generated dat... | Key/Value | United States of America | 2002 | Commercial | C++ | Proprietary |
| SpreadsheetDB | SpreadsheetDB was a database-as-a-service that used a JavaScript-based spreadsheet front-end usin... | Document / XML | France | 2017 | Commercial | Go | Proprietary |
| SQL Anywhere | SQL Anywhere is a proprietary relational DBMS. | Relational | Canada | 1992 | Commercial | Proprietary | |
| SQL Server | Microsoft SQL Server (MSSQL) is a commercial DBMS supporting both structured and unstructured dat... | Relational | United States of America | 1988 | Commercial | C++ | Proprietary |
| SQL/DS | SQL/DS (Structured Query Language/Data System) was IBM's first commercial relational DBMS product... | Relational | United States of America | 1981 | Commercial | Proprietary | |
| SQLBase | SQLBase was one of an early relational DBMS designed for PC platforms, initially released for DOS... | Relational | United States of America | 1984 | Commercial | Proprietary | |
| SQLflex | SQLflex is a standalone relational DBMS designed to be SQL compatible with Informix. | Relational | United States of America | Commercial | C | Proprietary | |
| SQLite | SQLite is a self-contained, high-reliability, embedded, full-featured, public-domain SQL database... | Relational | United States of America | 2000 | Commercial, Open Source | Public Domain | |
| SQLite.Cloud | SQLite.Cloud is a database service that provides a distributed DBMS based on SQLite. | Relational | Italy | 2020 | Commercial | Proprietary | |
| SQream | SQream is a relational DBMS that uses GPUs to accelerate query processing. | Relational | Israel | 2010 | Commercial | C++, Haskell | Proprietary |
| Sqrrl | Sqrrl is a graph database management system (DBMS) . It uses secure, adaptable NoSQL built from A... | Key/Value, Graph | United States of America | 2012 | Commercial | Java | |
| SRCH² | SRCH² was a in-memory search engine. | United States of America | 2010 | Commercial, Open Source | C++ | Proprietary | |
| SSDB | SSDB is a NoSQL database implemented in C++. The goal of SSDB is to substitute, or work together ... | Key/Value | China | 2013 | Open Source | C++ | BSD |
| Starcounter | Starcounter is an in-memory DBMS that supports transactions. | Sweden | 2006 | Commercial | Proprietary | ||
| Stardog | Stardog is a graph database management system. | Triplestore / RDF | United States of America | 2005 | Commercial | Java | Proprietary |
| StarRocks | StarRocks is a distributed relational DBMS designed for data warehouse workloads. | Column Family / Wide-Column, Relational | China | 2021 | Commercial, Open Source | C++, Java | Apache v2 |
| Starskey | Starskey is a embedded key-value, log-structured DBMS. | Key/Value | Canada | 2025 | Hobby, Open Source | Go | Mozilla Public License |
| StellarSQL | StellarSQL is an embedded SQL DBMS written in Rust. | Relational | Taiwan | 2018 | Hobby, Open Source | Rust | MIT |
| StereoDB | StereoDB is an in-memory embedded DBMS for F# and C# applications. | Relational | Ukraine | 2023 | Hobby, Open Source | F# | Apache v2 |
| Stig | Stig is a non-relational, distributed graph database that was developed at Tagged. | Graph | United States of America | 2010 | Open Source | C++ | Apache v2 |
| StoneDB | StoneDB is a columnar MySQL-compatible storage engine that supports OLAP workloads. | Relational | China | 2022 | Commercial, Open Source | ||
| Stoolap | Stoolap is a relational HTAP DBMS written in pure Go with zero dependencies. | Relational | Turkey | 2025 | Hobby, Open Source | Go | Apache v2 |
| StormDB | StormDB was a database-as-a-service based on Postgres-XC. | Object-Relational | United States of America | 2012 | Commercial | ||
| StormiDB | StormiDB is a document-oriented DBMS that uses Azure Blob Storage as its backing storage. | Document / XML | United States of America | 2024 | Open Source | JavaScript | MIT |
| Strabon | Strabon is a semantic geospatial database system for storing linked geospatial data expressed in ... | Triplestore / RDF | Greece | 2011 | Academic, Open Source | Java | |
| StrixDB | StrixDB is a RDF store supporting SPARQL. It can be used as a SPARQL server with Apache HTTP Serv... | Triplestore / RDF | France | Commercial, Open Source | Proprietary | ||
| Strozzi NoSQL | Strozzi NoSQL is a shell-based relational database management system created by Carlo Strozzi in ... | Relational | Italy | 1989 | Commercial, Open Source | GPL v2 | |
| STSdb | STSdb is a NoSQL key-value store written in C# for the Microsoft .NET environment. | Key/Value | Bulgaria | 2008 | Commercial, Open Source | C# | GPL v2, GPL v3 |
| SummitDB | SummitDB is an in-memory, NoSQL key/value DBMS. | Key/Value | United States of America | 2016 | Hobby, Open Source | Go | MIT |
| Superbase | Superbase is a relational DBMS designed for desktop applications. | Relational | United Kingdom | 1983 | Commercial | Proprietary | |
| SUPRA Server SQL | Relational | United States of America | 1992 | Commercial | Proprietary | ||
| SurrealDB | SurrealDB is a multi-model DBMS that supports embedded and shared-nothing deployments. It uses a ... | Relational, Document / XML, Graph | United Kingdom | 2016 | Commercial, Open Source | Rust | Business Source License |
| Swarm64 | Swarm64 is a fork of PostgreSQL that uses extensions to improve OLAP query performance. | Germany | 2013 | Commercial | Proprietary | ||
| SwayDB | SwayDB is an embedded, non-blocking and type-safe NoSql database under development. It can be con... | Key/Value | Australia | 2018 | Commercial, Open Source | Scala | AGPL v3 |
| SWC-DB | SWC-DB ("Super Wide Column Database") is a wide-column DBMS. SWC-DB does not have Tables nor Name... | Column Family / Wide-Column, Key/Value | Israel | 2019 | Commercial, Open Source | C++ | GPL v3, Proprietary |
| Sybase IQ | United States of America | 1993 | Commercial | C, C++ | Proprietary | ||
| SylvaDB | Sylva (from "silva", a book to organize knowledge during the Renaissance) is a flexible graph dat... | Graph | Canada | 2009 | Academic, Open Source | JavaScript | AGPL v3 |
| SylvieJS | SylvieJS is a document-oriented DBMS written designed to run in Node.js and web browsers. | Document / XML | United States of America | 2023 | Hobby, Open Source | JavaScript | MIT |
| System G | IBM System G is a framework for graph processing workloads. It includes a graph database (called ... | Graph | United States of America | 2009 | Industrial Research, Open Source | ||
| System R | Relational | United States of America | 1972 | Industrial Research | Proprietary |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| TabDB | TabDB is a relational DBMS that uses JavaScript to store data in web browser tabs as titles. To e... | Relational | United States of America | 2019 | Hobby, Open Source | JavaScript | |
| Tablespace | Tablespace is a cloud-hosted version of PostgreSQL that uses proprietary extensions to provide fr... | United Kingdom | 2024 | Commercial | Proprietary | ||
| TaffyDB | TaffyDB is an in-memory embedded DBMS engine written in JavaScript. | Document / XML | United States of America | 2009 | Open Source | JavaScript | MIT |
| Tajo | Apache Tajo is an open-source big data relational and distributed data warehouse system that prov... | Relational | South Korea | 2012 | Open Source | Java | Apache v2 |
| Tamino | Tamino Information Server is an XML-based database management system from Software AG. | Document / XML | Germany | 2000 | Academic, Commercial | ||
| Tantivy | Tantivy is an embedded full-text search engine library inspired by Apache Lucene. | Document / XML | Japan | 2016 | Open Source | Rust | MIT |
| Tarantool | Tarantool is an integration of a Lua application server and a database management system. The DBM... | Key/Value | Russia | 2008 | Commercial, Open Source | C | BSD |
| TayzGrid | TayzGrid is an elastic in-memory data grid with a peer to peer dynamic clustering architecture. | Object-Oriented | United States of America | Commercial, Open Source | Java | Proprietary | |
| Tdbengine | Tdbengine is a relational DBMS system that uses a custom query language API called [EASY](https:/... | Relational | Germany | 1985 | Commercial | Pascal | Proprietary |
| TDengine | TDengine is a open-source DBMS for time-series data. | Relational | China | 2017 | Commercial, Open Source | C | AGPL v3 |
| TDSQL | TDSQL is an abbreviation for TecentDistributed SQL. It is derived from MySQL and aimed at providi... | Relational, Key/Value, Document / XML | China | 2012 | Commercial | ||
| Tendis | Tendis is a distributed DBMS that is compatible with the Redis protocol. | Key/Value | China | 2018 | Open Source | C++ | GPL v3 |
| TensorBase | TensorBase is a OLAP query engine designed to execute on Apache Arrow data sets. | Relational | China | 2020 | Commercial, Open Source | Rust | Apache v2 |
| Tera | Tera is a 100 PBs level, real-time high performance distributed NoSQL database. The storage archi... | Column Family / Wide-Column | China | 2014 | Commercial, Open Source | C++ | BSD |
| Teradata | Teradata is a relational database management system designed specifically for large warehouse app... | Relational, Document / XML, Graph | United States of America | 1979 | Commercial | Proprietary | |
| TerarkDB | TerarkDB was an embedded key-value store based on a fork from RocksDB (v5.18.3). | Key/Value | China | 2016 | Open Source | C++ | Apache v2 |
| TerminusDB | TerminusDB is an open-source model driven graph DBMS designed for knowledge graph representation. | Document / XML, Graph, Triplestore / RDF | Ireland | 2019 | Commercial, Open Source | Prolog, Rust | GPL v3 |
| Terrastore | Terrastore was a distributed document DBMS that provided per-document consistency guarantees. | Document / XML | United Kingdom | 2009 | Open Source | Java | Apache v2 |
| Tesora | United States of America | Commercial | |||||
| Theseus | Theseus is a distributed DBMS that uses GPUs to accelerate OLAP queries. | Relational | United States of America | 2022 | Commercial | C++ | Proprietary |
| ThinkSQL | ThinkSQL is a relational DBMS that supports SQL written in Pascal. | Relational | United Kingdom | 2000 | Commercial, Open Source | Pascal | |
| ThreadDB | ThreadDB is peer-to-peer (P2P) distributed document-oriented DBMS based on IPFS. | Document / XML | United States of America | 2019 | Open Source | Go | MIT |
| ThruDB | ThruDB was a collection of database services built on top of the Thrift framework. It supported m... | United States of America | 2006 | Open Source | C++ | BSD | |
| Tibero | Tibero is a commercial relational database management system developed TmaxSoft. It is currently ... | Relational | South Korea | 2003 | Commercial | C | Proprietary |
| TiDB | TiDB is an open-source distributed SQL database that supports Hybrid Transactional and Analytical... | Key/Value | United States of America | 2015 | Commercial, Open Source | Go | Apache v2 |
| TidesDB | TidesDB is an embedded log-structured storage engine that supports column-family data organization. | Column Family / Wide-Column | Canada | 2024 | Hobby, Open Source | C | Mozilla Public License |
| tiedot | tiedot is a document-oriented DBMS uses JSON with set operations. It can be embedded into an appl... | Document / XML | Finland | 2013 | Open Source | Go | BSD |
| TieredMemDB | TieredMemDB is a fork of Redis from Intel that is designed to store data in persistent memory. | Poland | 2020 | Industrial Research, Open Source | |||
| TigerBeetle | TigerBeetle is a financial accounting DBMS written in Zig. It is not a general purpose DBMS and t... | Relational | South Africa | 2020 | Open Source | Zig | Apache v2 |
| TigerGraph | TigerGraph is a distributed, parallel graph DBMS with high availability designed for real-time an... | Graph | United States of America | 2012 | Commercial | C++ | Proprietary |
| TiKV | TiKV is an open source distributed Key-Value database which is based on the design of Google Span... | Key/Value | China | 2016 | Open Source | Rust | Apache v2 |
| Tile38 | Tile38 is an in-memory geolocation data store. | United States of America | 2016 | Open Source | Go | MIT | |
| TileDB | TileDB is an embedded storage engine designed to support the storage and access of both dense and... | Array / Matrix | United States of America | 2014 | Commercial, Open Source | C++ | MIT |
| Timbala | Timbala was an experimental time-series database written in Go. | Relational | United Kingdom | 2016 | Hobby, Open Source | Go | Apache v2 |
| TIMBER | TIMBER ("Tree-structured native XML database Implemented at the University of Michiga... | Document / XML | United States of America | Academic, Open Source | |||
| TimescaleDB | TimescaleDB is an open-source SQL database designed for scalable time-series data. It enables bot... | Relational | United States of America | 2017 | Commercial | Apache v2 | |
| TimesTen | TimesTen is an in-memory, relational OLTP database management system supporting SQL through Open ... | Relational | United States of America | 1996 | Commercial | Proprietary | |
| Timestream | Amazon Timestream is a managed time series database service designed for IoT and operational appl... | Relational | United States of America | 2018 | Commercial | Proprietary | |
| TingoDB | TingoDB is an embedded Node.js database written in JavaScript and is designed to be API compatibl... | Document / XML | Russia | 2013 | Open Source | JavaScript | MIT |
| TinyBase | TinyBase is an embedded relational DBMS for TypeScript applications. | Relational | United States of America | 2021 | Open Source | TypeScript | MIT |
| TinyDB | TinyDB is a document-oriented database management system written in Python with no external depen... | Document / XML | Germany | 2013 | Open Source | Python | MIT |
| TinyDB | TinyDB was a SQL-based query processing system over decentralized remote sensors. It was designed... | Relational | United States of America | 1999 | Academic, Open Source | C | |
| tinySQL | United States of America | 2003 | Open Source | Java | |||
| Titan | Titan is a graph database engine. | Graph | United States of America | 2012 | Open Source | Java | Apache v2 |
| Titan | Titan is a distributed NoSQL DBMS that is designed to be compatible with the Redis protocol. | China | 2018 | Hobby, Open Source | Go | Apache v2 | |
| Tkrzw | Tkrzw ("Traveling Kangaroos Riding Zeebras Wildly") s a C++ database manager (DBM) library that p... | Key/Value | Japan | 2020 | Open Source | C++ | Apache v2 |
| TokuDB | TokuDB is a replacement storage engine for MySQL that used write-optimized fractal trees (aka Bε... | Relational | United States of America | 2009 | Commercial, Open Source | GPL v2 | |
| TokuMX | United States of America | Commercial, Open Source | AGPL v3, Apache v2, GPL v2 | ||||
| Tokyo Cabinet | Tokyo Cabinet is an embedded [key-value store]... | Key/Value | Japan | 2006 | Open Source | C | LGPL v2 |
| Tokyo Tyrant | Japan | Open Source | |||||
| TomP2P | TomP2P is a distributed hash table with additional features, such as storing multiple values for ... | Key/Value | Switzerland | 2004 | Open Source | Java | Apache v2 |
| Tonbo | Tonbo is an embedded, log-structured key-value DBMS that supports writing data to object stores. ... | Key/Value | China | 2024 | Hobby, Open Source | Rust | Apache v2 |
| TonicDB | TonicDB is a Redis-compatible key/value store that runs on bare metal hardware. Instead of using ... | Key/Value | United States of America | 2025 | Commercial | Proprietary | |
| TopK | TopK is a document DBMS that supports vector and keyword search. | Document / XML | Czechia | 2024 | Commercial, Open Source | Rust | MIT, Proprietary |
| ToplingDB | ToplingDB is a hard-fork of RocksDB with additional enhancements and features. | Key/Value | China | 2021 | Open Source | C++ | Apache v2 |
| ToroDB | ToroDB is a middleware layer that turns Postgres into a MongoDB-compatible server. | Document / XML | Spain | Open Source | Java | AGPL v3 | |
| TOTAL | United States of America | Commercial | |||||
| toyDB | toyDB is educational distributed relational database written in Rust. | Relational | Norway | 2019 | Educational, Open Source | Rust | Apache v2 |
| Trafodion | Trafodion is an open-source webscale SQL-on-Hadoop DBMS solution that extends and builds on Apach... | Column Family / Wide-Column | United States of America | 2014 | Open Source | C++, Java | Apache v2 |
| TrailDB | TrailDB is a portable C library that allows querying a series of relative events. It is used to g... | Relational | United States of America | 2014 | Commercial, Open Source | C | MIT |
| Transactions | OrigoDB is an in-memory event-sourced database engine for NET/Mono environments. It allows users ... | Relational, Key/Value, Document / XML, Graph, Object-Oriented | Sweden | 2011 | Commercial, Open Source | C# | MIT |
| Transbase | Relational | Germany | 1987 | Commercial | Proprietary | ||
| TransLattice | United States of America | 2007 | |||||
| TreodeDB | TreodeDB is a distributed key-value store that provides atomic multi-row writes. | Key/Value | United States of America | 2012 | Commercial, Open Source | Scala | Apache v2 |
| Trino | Trino is a distributed SQL query engine designed to run on disparate storage systems. | United States of America | 2019 | Open Source | Java | Apache v2 | |
| Trousseau | Trousseau is an encrypted key-value store engine that stores the database in a single file | Key/Value | Germany | 2013 | Open Source | Go | MIT |
| Truviso | Truviso is a continuous query DBMS system built on Postgres. Truviso supports "always-on" queries... | Object-Relational | United States of America | 2006 | Commercial | C | Proprietary |
| ts-sql | ts-sql is simple relational DBMS supporting SQL written in TypeScript. | Relational | United Kingdom | 2020 | Hobby, Open Source | TypeScript | |
| TuGraph | TuGraph is a property graph DBMS developed by Alibaba and Tsinghua University. | Graph | China | 2021 | Open Source | C++ | Apache v2 |
| TukDB | TukDB is a yet-to-be released search engine DBMS. | Document / XML | Croatia | 2024 | Hobby | Functional Source License | |
| TurboImage | United States of America | 1972 | Commercial | ||||
| turbopuffer | turbopuffer is a proprietary vector search database-as-a-service system. | Vector | Canada | 2023 | Commercial | Proprietary | |
| Twig | Object Datastore for Google App Engine. | Object-Oriented | United States of America | 2009 | Open Source | Java | Apache v2 |
| TypeDB | TypeDB is a strongly-typed database with a rich and logical type system. It uses a proprietary qu... | Graph, Entity-Relationship | United Kingdom | 2016 | Commercial, Open Source | AGPL v3 | |
| Typhoon | Typhoon is a freely available relational database management system for the UNIX and OS/2 environ... | Relational | Denmark | 1996 | Open Source | C | MIT |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| UDS/SQL | Network | Germany | Commercial | Proprietary | |||
| Ultipa | Ultipa Graph is a closed-source graph DBMS. Ultipa Graph Database is ACID-compliant with native g... | Graph | United States of America | 2019 | Commercial | Proprietary | |
| Ultralite | Ultralite is a mobile embedded relational DBMS derived from SQL Anywhere. | Relational | Canada | 1999 | Commercial | ||
| Umbra | Umbra is a relational DBMS designed to support high performance for OLAP and OLTP workloads using... | Relational, Array / Matrix | Germany | 2018 | Academic | C++ | Proprietary |
| Unbounded | Unbounded is a serverless document-oriented DBMS that targets JavaScript applications. | Document / XML | United States of America | 2020 | Commercial | Proprietary | |
| UniSQL | Object-Relational | United States of America | 1991 | Commercial | Proprietary | ||
| UniVerse | United States of America | 1990 | Commercial | ||||
| UnQLite | UnQLite is an embedded NoSQL (Key/Value store and Document-store) database engine. | Key/Value, Document / XML | Tunisia | Commercial, Open Source | C | ||
| UnumDB | UnumDB is a distributed key/value database-as-a-service. | Key/Value, Document / XML, Graph, Array / Matrix | Armenia | 2015 | Commercial | C++ | Apache v2, Proprietary |
| upscaledb | upscaledb is an embedded key/value store DBMS for analytical workloads. | Key/Value | Germany | 2007 | Commercial, Open Source | C, C++ | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Vald | Vald ("Vektor Wald") is a distributed fast approximate nearest neighbor (ANN) dense vector search... | Vector | Japan | 2019 | Open Source | Go | Apache v2 |
| Valentina Server | Object-Relational | United States of America | 1998 | Commercial | Proprietary | ||
| Valkey | Valkey is a hard-fork of Redis started in 2024. | Key/Value | United States of America | 2024 | Open Source | C | BSD |
| VanillaDB | VanillaDB is a single node, multi-threaded relational database engine that partially supports the... | Multi-Value | Taiwan | 2016 | Academic, Open Source | Java | Apache v2 |
| Vearch | Vearch is a distributed vector search engine. | Document / XML, Vector | China | 2019 | Open Source | C++ | Apache v2 |
| Vector | Actian Vector is a commercial main-memory RDBMS targeting analytical workload and decision suppor... | Relational | Netherlands | 2009 | Commercial | Proprietary | |
| VectorDB | VectorDB is a simplistic vector DBMS for Python applications. | Document / XML, Vector | Spain | 2023 | Commercial, Open Source | Python | Apache v2 |
| VectorDB | VectorDB is an embedded vector DBMS written in Python. | Document / XML, Vector | United States of America | 2023 | Open Source | Python | MIT |
| VectorSQL | VectorSQL is an analytics DBMS designed for IoT data. | Relational | China | 2020 | Hobby, Open Source | Go | Apache v2 |
| Vedis | Vedis is an embeddable library built with over 70 commands similar in concept to Redis but withou... | Key/Value | Tunisia | 2014 | Commercial | C | Proprietary |
| VelarixDB | VelarixDB is an embedded key-value storage engine for Rust applications. | Key/Value | Nigeria | 2024 | Hobby, Open Source | Rust | MIT |
| VelocityDB | VelocityDB is a NoSQL object-oriented DBMS that supports both embedded and distributed deployments. | Object-Oriented | United States of America | 2011 | Commercial | C# | Proprietary |
| Velox | Velox is a reusable vectorized database execution engine. It can be used to build compute engines... | Relational | United States of America | 2020 | Industrial Research, Open Source | C++ | Apache v2 |
| VeloxDB | VeloxDB is an in-memory object-oriented DBMS. | Object-Oriented | Serbia | 2022 | Commercial, Open Source | C# | MIT |
| Venice | Venice is a derived data storage platform that supports asynchronous ingestion from batch and str... | Document / XML | United States of America | 2014 | Open Source | Java | BSD |
| VennDB | VennDB is an append-only in-memory DBMS that is based on bitmap index storage. | Relational | Belgium | 2023 | Open Source | Rust | Apache v2, MIT |
| Versant Object Database | Object-Oriented | United States of America | 1988 | Commercial | Proprietary | ||
| VertexDB | Graph | United States of America | Hobby, Open Source | ||||
| Vertica | Vertica is a distributed, shared-nothing column-store DBMS. | Relational | United States of America | 2005 | Commercial | C++ | PostgreSQL License |
| Vespa | Vespa is a document-oriented search engine that supports a SQL dialect (YQL). | Document / XML | Norway | 1997 | Open Source | C++ | Apache v2 |
| vFabric SQLFire | United States of America | Commercial | |||||
| VictoriaMetrics | VictoriaMetrics Open Source is a fast and scalable open-source time series database and monitorin... | Column Family / Wide-Column | Ukraine | 2018 | Open Source | Go | Apache v2 |
| Virtuoso | Virtuoso Universal Server is a middleware and database engine hybrid that provides an object-rela... | Object-Relational | Finland | 1998 | Commercial | C | GPL v2, Proprietary |
| VistaDB | VistaDB is an embedded SQL database for .NET applications. | United States of America | 2009 | Commercial | C# | Proprietary | |
| Visual FoxPro | Visual FoxPro was a fork of the FoxPro DBMS for desktop applications. | Relational | United States of America | 1992 | Commercial | Proprietary | |
| Vitess | Vitess is a middleware layer for scaling out MySQL. | Relational | United States of America | 2011 | Open Source | Go | Apache v2 |
| Vitesse DB | Vitesse is a column-store execution engine that integrates with Postgres and Greenplum. | Object-Relational | United States of America | 2014 | Commercial | ||
| ViyaDB | ViyaDB is an in-memory columnar analytical data store. | Israel | 2017 | Open Source | C++ | Apache v2 | |
| voidDB | voidDB is an embedded key/value DBMS that uses memory-mapped files to manage memory. | Key/Value | Japan | 2024 | Hobby, Open Source | Go | BSD |
| Voldemort | Voldemort is a distributed key-value DBMS created by LinkedIn. | Key/Value | United States of America | 2009 | Open Source | Java | Apache v2 |
| VoltDB | VoltDB is a commercial in-memory DBMS that is scalable and ACID-compliant. VoltDB is designed to ... | Relational | United States of America | 2009 | Commercial, Open Source | C++, Java | GPL v3, VoltDB Proprietary License |
| vsql | vsql is a single-file SQL database written in the V programming language with no external depende... | Relational | United States of America | 2021 | Hobby, Open Source | V | MIT |
| VulcanDB | VulcanDB was an object-oriented mobile database engine for the .Net environment. | Object-Oriented | United States of America | 2012 | Commercial | C# | Proprietary |
| vyhodb | vyhodb is a network-model DBMS written in Java that supports serializable transactions. | Network | Russia | 2012 | Hobby, Open Source | Java | Microsoft Reference Source License |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| WakandaDB | WakandaDB was a NoSQL DBMS from the mid-2010s. | Document / XML | France | 1996 | Commercial | ||
| Warp 10 | Warp 10 is an open-source time series DBMS to collect, store and analyze sensors and time series ... | France | 2013 | Commercial, Open Source | Java | Apache v2 | |
| Weaviate | Weaviate is a vector DBMS that uses a custom query interface. | Vector | Netherlands | 2016 | Commercial, Open Source | Assembly, C++, Go | BSD |
| WebScaleSQL | China | 2014 | Open Source | GPL v2 | |||
| WebSphere eXtreme Scale | WebSphere eXtreme Scale is an elastic, scalable, in-memory data grid. | Object-Oriented | United States of America | Commercial | Java | ||
| WhiteDB | In-memory tuple store aiming to be fast and easy to use in embedded systems. Future goal is to in... | Network | Estonia | 2008 | Hobby, Open Source | C | GPL v3 |
| WiredTiger | WiredTiger is an open-source key/value storage engine for NoSQL databases and is currently the de... | Key/Value | Australia | 2008 | Commercial, Open Source | C | GPL v2, GPL v3 |
| WonderDB | WonderDB is a transactional single-node DBMS written in Java. | Relational | United States of America | 2013 | Hobby, Open Source | Java |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| XAP | XAP is a distributed in-memory data grid that supports the ability to conduct millions of transac... | Key/Value | United States of America | 2000 | Commercial, Open Source | Java | Apache v2 |
| Xapian | Xapian is an open-source search engine that supports full-text queries. | Document / XML | United Kingdom | 2001 | Commercial, Open Source | C++ | GPL v2 |
| XDB Enterprise Server | XDB Enterprise Server is a relational DBMS designed for compatibility with IBM Db2. | Relational | United States of America | 1998 | Commercial | Proprietary | |
| Xeround | Xeround was a database-as-a-service based on MySQL. | Relational | Israel | 2005 | Commercial | Proprietary | |
| Xodus | Xodus is a transactional schema-less embedded DBMS that is written in Java. | Document / XML | Russia | 2014 | Open Source | Java, Kotlin | Apache v2 |
| XPRS | XPRS ("eXtended Postgres, Raid and Sprite") was a database machine built at Berkeley. | United States of America | 1988 | Academic | |||
| XTDB | XTDB is an bitemporal document DBMS that uses Apache Kafka for the primary storage of transaction... | Document / XML | United Kingdom | 2018 | Commercial, Open Source | Clojure | MIT |
| XtremeData | XtremeData (dbX) is a in-memory OLAP DBMS derived from PostgreSQL. | Relational | United States of America | 2003 | Commercial | Proprietary |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Yaacomo | Yaacomo is a relational, in-memory DBMS for real-time analytics. | Relational | Germany | Commercial | Proprietary | ||
| Yanza | Yanza was a time-series database. | Document / XML | United Kingdom | 2008 | Commercial | Lua | Proprietary |
| YaraDB | YaraDB is a in-memory, document-oriented DBMS. | Document / XML | Ukraine | 2025 | Open Source | Python | |
| YARD-SQL | Germany | 1996 | Commercial | Java | |||
| YDB | YDB (Yandex Database) is a distributed NewSQL relational DBMS compatible with Postgres. | Relational | Russia | 2014 | Commercial, Open Source | C++ | Apache v2 |
| Yellowbrick | Yellowbrick is a relational data warehouse that is optimized for flash-based storage. | Relational | United States of America | 2014 | Commercial | C, C++, Go, Java, Python | Proprietary |
| YottaDB | YottaDB is a multi-process embedded NoSQL key-value DBMS. | Key/Value | United States of America | 2001 | Commercial, Open Source | C | AGPL v3 |
| YouTrackDB | YouTrackDB is an object-oriented graph DBMS that supports documents and full-text search. The sys... | Graph | Czechia | 2024 | Open Source | Java | Apache v2 |
| YugabyteDB | YugabyteDB is a high-performance transactional distributed SQL database for cloud-native and geo-... | Relational, Key/Value | United States of America | 2016 | Commercial, Open Source | C++ | Apache v2 |
| Database | Description | Data Models | Country | Year | Type | Written In | License |
|---|---|---|---|---|---|---|---|
| Zentropy | Zentropy is a single-node key-value DBMS written in Zig that supports TCP and Unix socket interfa... | Key/Value | India | 2025 | Hobby, Open Source | Zig | MIT |
| ZeroDB | ZeroDB is an end-to-end encrypted DBMS. | Document / XML | United States of America | 2015 | Commercial, Open Source | Python | AGPL v3 |
| ZippyDB | ZippyDB is a strongly consistent, geographically distributed key-value DBMS developed internally ... | Key/Value | United States of America | 2013 | Internal / Non-Public | Proprietary | |
| ZippyDB | ZippyDB is a proprietary serverless Redis cache. | Key/Value | United States of America | 2014 | Commercial | Proprietary | |
| ZODB | The Zope Object Database (ZODB, ZopeDB) is an object-oriented DBMS library for storing Python obj... | Object-Oriented | United States of America | 2002 | Open Source | Python | Zope Public License |
| ZooDB | ZooDB is an object oriented database based on the JDO 3.0 standard. | Object-Oriented | Switzerland | 2008 | Open Source | Java | GPL v3 |
| Zookeeper | ZooKeeper is a distributed, open source coordination service from Apache for distributed applicat... | Hierarchical | United States of America | 2008 | Open Source | Java | Apache v2 |
Last generated: 2026-04-04 · Source: dbdb.io · Tool: dbdb-index