Sigma is a generic and open signature format that allows you to describe relevant log events in a straightforward manner. The rule format is very flexible, easy to write and applicable to any type of log file.
Cost / License
- Free
- Open Source
Platforms
- Self-Hosted

Sigma is the most popular Self-Hosted alternative to LogSentinel SIEM.
Sigma is the most popular Open Source & free alternative to LogSentinel SIEM.
- Sigma is Free and Open Source






































