Suricata

Suricata is a high-performance, open-source network IDS/IPS and network security monitoring engine. It is designed to be multi-threaded, allowing it to handle high-speed traffic with ease, making it a superior alternative to older tools like Snort. Suricata supports modern protocols and provides deep packet inspection, making it highly effective at detecting sophisticated threats. It is widely used by both enterprises and security vendors as the underlying engine for their commercial products.

Its ability to integrate with various threat intelligence feeds and output formats makes it a versatile component of any security stack.