Best Free Intrusion Detection and Prevention Systems in 2026

Popular Free Intrusion Detection and Prevention Systems

Check out our list of free Intrusion Detection and Prevention Systems . Products featured on this list are the ones that offer a free trial version & free versions. As with most free versions, there are limitations, typically time or features. If you’d like to see more products and to evaluate additional feature options, compare all Intrusion Detection and Prevention Systems to ensure you get the right product.

Best Free Intrusion Detection and Prevention Systems

(Showing 1 - 3 of 3 products)

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Snort

Brand: Cisco Systems

A network security tool that detects and prevents network intrusions in real time.... Read More About Snort read review arrow

FREE

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OSSEC

Brand: OSSEC

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An open-source host-based intrusion detection system for log analysis, file integrity monitoring, and real-time threat response.... Read More About OSSEC read review arrow

Price On Request

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Suricata

Brand: Open Information Security Foundation

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Suricata is an open-source intrusion detection and prevention system (IDS/IPS) that monitors network traffic to detect, analyze, and block cyber threats in... Read More About Suricata read review arrow

FREE

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Last Updated on : 13 Jul, 2026

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