Security-Onion-Solutions/securityonion

OSSEC is an Open Source Host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.

Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.

Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

TheHive is a Collaborative Case Management Platform, now distributed as a commercial version

MISP (core software) - Open Source Threat Intelligence and Sharing Platform

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine developed by the OISF and the Suricata community.

Snort++

Arkime is an open source, large scale, full packet capturing, indexing, and database system.

Cloud-native SIEM for intelligent security analytics for your entire enterprise.