Open source siem projects
Every project in the registry tagged siem, ranked by real GitHub adoption.
Red Team's SIEM - tool for Red Teams used for tracking and alarming about Blue Team activities as well as better usability in long term operations.
Fast and easy to use database for logs, which can efficiently handle terabytes of logs
🐳 Elastic Stack (ELK) v9+ on Docker with Compose. Pre-configured out of the box to enable Logging, Metrics, APM, Alerting, ML, and SIEM features. Up with a Si
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Frequently asked questions
How many open source siem projects are there?
This registry tracks 3 projects tagged siem, with 7,027 GitHub stars between them. The most-adopted is RedELK at 2,670 stars.
Are these siem projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 3 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 siem 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 siem 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.