Suricata is described as 'high performance Network IDS, IPS and Network Security Monitoring engine. Open Source and owned by a community run non-profit foundation, the Open Information Security Foundation (OISF). Suricata is developed by the OISF and its supporting vendors' and is an app in the Network & Admin category. There are three alternatives to Suricata for Linux, Mac, Windows and Online / Web-based. The best alternative is snort, which is both free and Open Source. Other great apps like Suricata are PacketSled (Freemium) and Redborder (Free, Open Source).
Snort® is an open source network intrusion prevention and detection system (IDS/IPS) developed by Sourcefire. Combining the benefits of signature, protocol, and anomaly-based inspection, Snort is the most widely deployed IDS/IPS technology worldwide.
PacketSled is next generation network forensics and breach detection. Continuously monitor for advanced threats and policy violations missed by other defenses, then analyze and remediate in record time.
redborder is an Open Source, Big Data cybersecurity and traffic analysis platform accompanied by a set of active probes managed in an integrated manner. Can be deployed on-premise or used as a cloud service. Managing SNORT events.