Best Intrusion Detection and Prevention Software in 2026
Updated
In short: Zscaler Private Access is ranked #1 of 35 as of 4 October 2026, ahead of WatchGuard FireCloud and Securepoint RC1000R G6. The best-ranked option with a free plan is CrowdSec. The lowest first paid tier on this page is AWS Network Firewall at $0.07/mo.
Protecting networks and systems starts with understanding what each intrusion detection and prevention tool covers and how it can be deployed. Compare network scope, cloud workload support, and supported platforms against the environment you need to monitor. Encrypted traffic inspection, threat intelligence, and inline blocking distinguish additional capabilities; free plans and paid-from pricing help you weigh access and cost. The entries include Zscaler Private Access, WatchGuard FireCloud, and Securepoint RC1000R G6, as well as options such as CrowdSec and OPNsense. Consider whether your priority is visibility, blocking, or both, and which listed capabilities matter for the systems in scope.
35 intrusion detection and prevention software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Zscaler Private Access iPhone + Android RecognisedPhone appDocumentedFree plan 7.1 Deployment model: cloudNetwork scope: networkInline blocking: Yes
- 2 WatchGuard FireCloud iPhone + Android RecognisedPhone appDocumentedFree plan 7.0$8.15/mo Deployment model: hybrid
- 3 Securepoint RC1000R G6 iPhone + Android RecognisedPhone appDocumentedFree plan 6.6 Deployment model: applianceNetwork scope: networkInline blocking: Yes
- 4 CrowdSec No phone app RecognisedPhone appDocumentedFree plan 6.4Free Deployment model: hybridNetwork scope: multi-scopeInline blocking: Yes
- 5 Arista NG Firewall No phone app RecognisedPhone appDocumentedFree plan 6.3$22.50/mo Deployment model: hybrid
- 6 OPNsense No phone app RecognisedPhone appDocumentedFree plan 6.3Free Deployment model: hybrid
- 7 pfSense No phone app RecognisedPhone appDocumentedFree plan 6.3Free Deployment model: hybrid
- 8 IPFire No phone app RecognisedPhone appDocumentedFree plan 6.2Free Deployment model: hybrid
- 9 OSSEC No phone app RecognisedPhone appDocumentedFree plan 6.2$5/mo Deployment model: hybridNetwork scope: multi-scope
- 10 SELKS No phone app RecognisedPhone appDocumentedFree plan 6.2Free Deployment model: softwareNetwork scope: networkInline blocking: Yes
- 11 Snort No phone app RecognisedPhone appDocumentedFree plan 6.2$2.50/mo Deployment model: softwareNetwork scope: networkInline blocking: Yes
- 12 Suricata No phone app RecognisedPhone appDocumentedFree plan 6.2Free Deployment model: softwareNetwork scope: networkInline blocking: Yes
- 13 Wazuh No phone app RecognisedPhone appDocumentedFree plan 6.2$571/mo
- 14 Check Point DDoS Protector No phone app RecognisedPhone appDocumentedFree plan 5.8 Deployment model: hybridNetwork scope: multi-scopeInline blocking: Yes
- 15 Trellix Data Loss Prevention No phone app RecognisedPhone appDocumentedFree plan 5.8 Deployment model: hybridNetwork scope: multi-scopeInline blocking: Yes
- 16 AhnLab V3 Internet Security No phone app RecognisedPhone appDocumentedFree plan 5.5 Deployment model: applianceNetwork scope: networkInline blocking: Yes
- 17 Huawei HiSecEngine USG6800G No phone app RecognisedPhone appDocumentedFree plan 5.5 Deployment model: applianceNetwork scope: networkInline blocking: Yes
- 18 Palo Alto Networks Panorama No phone app RecognisedPhone appDocumentedFree plan 5.5 Deployment model: hybridNetwork scope: multi-scopeInline blocking: Yes
- 19 AWS Network Firewall No phone app RecognisedPhone appDocumentedFree plan 5.4$0.07/mo Deployment model: cloud
- 20 Forcepoint ZTNA No phone app RecognisedPhone appDocumentedFree plan 5.4 Deployment model: hybrid
- 21 FortiGate No phone app RecognisedPhone appDocumentedFree plan 5.4 Deployment model: hybrid
- 22 Hillstone Security Management No phone app RecognisedPhone appDocumentedFree plan 5.4 Deployment model: applianceNetwork scope: networkInline blocking: Yes
- 23 Juniper Security Director No phone app RecognisedPhone appDocumentedFree plan 5.4 Deployment model: hybrid
- 24 Radware Alteon No phone app RecognisedPhone appDocumentedFree plan 5.4 Deployment model: hybrid
- 25 FortiGuard DNS Filtering Service No phone app RecognisedPhone appDocumentedFree plan 5.3 Network scope: network
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which intrusion detection and prevention software is ranked first on Samsung Mobile US Press?
Zscaler Private Access is ranked #1 of 35 with a score of 7.1. WatchGuard FireCloud is second and Securepoint RC1000R G6 third.
How many of these have a free plan?
10 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, AWS Network Firewall has the lowest first paid tier we found: $0.07/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.