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@Intevation
Intevation Intevation
Intevation GmbH is an independent IT service company from Germany. All its IT solutions are Free Software (Open Source).

Osnabrück, Germany

@ANSSI-FR
ANSSI ANSSI-FR

Paris, France

@cerebrate-project
Cerebrate project cerebrate-project
Cerebrate is an open-source platform meant to act as a trusted contact information provider and interconnection orchestrator for other security tools.
@SK-CERT
SK-CERT SK-CERT
Slovak National CSIRT team

Slovakia

@certat
CERT.at certat
CERT.at - national CERT of Austria
@vuldb
VulDB vuldb
Number one vulnerability management and threat intelligence platform. Explaining vulnerabilities, exploits, and mitigations since 1970.
@govcert-ch
GovCERT.ch govcert-ch

GovCERT.CH Berne, Switzerland

@cert-orangecyberdefense
CERT Orange Cyberdefense cert-orangecyberdefense
CERT Orange Cyberdefense

CERT Orange Cyberdefense

@QinetiQ-Cyber-Intelligence
QinetiQ Cyber & Intelligence QinetiQ-Cyber-Intelligence
A set of repositories publicly released by QinetiQ's Cyber and Intelligence space. No warranty is provided.

United Kingdom

@VECERTUSA
VECERT VECERTUSA
Advanced protection and intelligent cybersecurity solutions. We transform data into defense and threats into opportunities. Your digital shield, today and alway
@telekom-security
Deutsche Telekom Security GmbH telekom-security
Telekom Security on GitHub, home of T-Pot, PEBA, Explo and more.

Bonn, Germany

@dessertlab
DESSERT Research Lab (University of Naples Federico II, Italy) dessertlab
The DESSERT (DEpendable and Secure Software Engineering and Real-Time Systems) research group at the Università degli Studi di Napoli Federico II
@Cosive
Cosive Cosive

Australia / New Zealand

@SEKOIA-IO
Sekoia.io SEKOIA-IO
Cybersecurity at a New Pace
@acronis
Acronis International GmbH acronis
Acronis leads the world in cyber protection - solving safety, accessibility, privacy, authenticity, and security (SAPAS) challenges with innovative solutions.

Switzerland, Singapore, USA and more!

@TW-NCERT
TW-NCERT
A workspace for TWNCERT Members
@oasis-open
OASIS TC Open Repositories oasis-open
Supporting open source development of resources associated with OASIS Technical Committees
@mitre-attack
MITRE ATT&CK mitre-attack

United States of America

@mitre
The MITRE Corporation mitre
Open Source Software from the MITRE Corporation

United States of America

@csirtgadgets
CSIRT Gadgets, LLC csirtgadgets
Helping Security Operators Innovate. Together- We are creating a Trustworthy Internet.

United States of America

@renisac
REN-ISAC renisac
The Research and Education Networks Information Sharing and Analysis Center

Bloomington, IN

@qcri
QCRI qcri
Qatar Computing Research Institute

Doha, Qatar

@adulau
Alexandre Dulaunoy adulau
Enjoy when human are using machines in unexpected ways. I break stuff and I do stuff.

@MISP @CIRCL @cve-search and many others Europe

@farsightsec
Farsight Security, Inc. farsightsec
Farsight provides the world’s largest real-time actionable threat intelligence information

San Mateo, CA, USA

@D4-project
D4 project D4-project
Large-scale distributed sensor network project to monitor DDoS and other malicious activities.

Worldwide

@CERTUNLP
CeSPI - CERTUNLP CERTUNLP
CERTUNLP es el CSIRT de la Universidad Nacional de La Plata, Argentina. Aquí compartimos muchos proyectos en los que trabajamos.

Argentina

@CERTCC
CERT Coordination Center (CERT/CC) CERTCC
The CERT Coordination Center is part of Carnegie Mellon University's Software Engineering Institute.

Pittsburgh, PA

@CZ-NIC
CZ.NIC CZ-NIC
.CZ domain registry

Prague, Czech Republic

@csirt-tooling-org
csirt-tooling.org csirt-tooling-org
Tooling WG of the CSIRTs Network
@CERT-Bund
CERT-Bund CERT-Bund
Github Repository for the German National / Governmental CERT - CERT-Bund

Bonn, Germany

@GEANT
GÉANT GEANT
GÉANT Github supported by the GÉANT software team. Please contact on the email shown for all repository, membership or team requests.

Amsterdam, Netherlands

@horse-framework
Horse Framework horse-framework
Horse is a .NET Core communication framework that includes Messaging Queues, Channel Pub/Sub, Distributed Caching and more.
@DNS-Hackathon
DNS Hackathon DNS-Hackathon
DNS Hackathon 2025

Sweden

@Quad9DNS
Quad9 DNS Quad9DNS
Quad9 DNS Recursive resolver OSS repository

Switzerland

@eclecticiq
EclecticIQ eclecticiq
EclecticIQ is a global provider of threat intelligence, hunting and response technology and services.

Amsterdam, The Netherlands

@mckinsey
Open Source by McKinsey mckinsey
To help create positive, enduring change in the world.
@eantcal
Antonino Calderone eantcal
This is a collection of open source projects I mainly wrote for educational purposes. Enjoy!

Dublin, Ireland

@pedramamini
Pedram Amini pedramamini
Chief Scientist at @OPSWAT. Formerly CTO at @InQuest. Previously founded the ZeroDayInitiative.com and OpenRCE.org. @pedramamini.com on BlueSky.

@InQuest Austin, TX