Compare software

chkrootkit vs OSSEC: catalog facts
chkrootkit	OSSEC
Free Free to download and use.	Free Free and open source; the OSSEC+ edition is also free after registration.
Linux, Command line	Self-hosted
Checks for many known rootkits and trojaned binaries Detects deleted login records and promiscuous interfaces	Combines log analysis, file integrity monitoring and active response Custom rules and scripts for tailored alerting
Command-line only Runs on the system it checks, so a thorough rootkit could hide from it	Configuration takes time to learn Extra features such as machine learning need registration for OSSEC+
Downloadable app	Self-hosted
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.