Snort
6.5#10 in intrusion detection and prevention softwareFrom $29.99 a yearFree planLinuxSelf-hosted
VisitSnort suits people who need rule-based network traffic analysis or inline prevention on Linux and self-hosted deployments. The Personal subscription is for home network or educational use; Business is for production or lab use.
Wazuh may suit organizations and individuals seeking security monitoring across endpoints, cloud services, and networks. It offers a self-hosted free option as well as paid Cloud plans.