Open source intrusion-detection projects
Every project in the registry tagged intrusion-detection, ranked by real GitHub adoption.
Open-source IDS/IPS, WAF and bot detection for Linux, Windows, Docker and Kubernetes, with a crowdsourced blocklist of malicious IPs.
OSSEC is an Open Source Host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-ti
Plugins for Wazuh Dashboard
Frequently asked questions
How many open source intrusion-detection projects are there?
This registry tracks 3 projects tagged intrusion-detection, with 20,540 GitHub stars between them. The most-adopted is crowdsec at 14,956 stars.
Are these intrusion-detection projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which intrusion-detection project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these intrusion-detection projects still maintained?
3 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.