Best Intrusion Detection and Prevention Software in 2026
Updated
Intrusion detection and prevention tools help monitor systems and networks for threats, and some can block traffic inline. Compare network scope, cloud workload support, deployment model, and supported platforms to see how each might fit your environment. Encrypted traffic inspection and threat intelligence are also listed capabilities; free plans and paid-from pricing provide cost context. CrowdSec, Wazuh, and OSSEC are among the entries to consider. Focus on the systems you need to protect and whether your priority is visibility, active prevention, or a combination of both.
38ranked
11free plans on this page
$2.50/molowest paid tier
9 Oct 2026last checked
Intrusion Detection and Prevention Software, ranked on how quickly a newcomer can get going.15 of 15 products with recorded free access can be tried for free.
- 1 CrowdSecFree plan
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 2 WazuhPaid from $571/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 3 OSSECPaid from $5/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 4 pfSenseFree plan
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 5 SuricataFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: yes
- 6 Arista NG FirewallPaid from $22.50/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 7 SELKSFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: yes
- 8 WatchGuard FireCloudPaid from $8.15/mo
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 9 SnortPaid from $2.50/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 10 Atomic OSSEC
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 11 scanlogdFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 12 Stormshield Management Center
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 13 IPFireFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 14 OPNsenseFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 15 Trellix Data Loss Prevention
- Well documented: yes
- Runs where you work: yes
- 16 Zscaler Private Access
- Well documented: yes
- Runs where you work: yes
- 17 Check Point DDoS Protector
- Well documented: yes
- Runs where you work: no
- 18 RdpGuardPaid from $4.16/mo
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 19 Hillstone Security Management
- Well documented: yes
- Runs where you work: no
- 20 Huawei HiSecEngine USG6800G
- Well documented: yes
- Runs where you work: no
- 21 Securepoint RC1000R G6
- Well documented: yes
- Runs where you work: yes
- 22 Clear NDR - Enterprise
- Well documented: yes
- Runs where you work: no
- 23 Forcepoint ZTNA
- Well documented: yes
- Runs where you work: yes
- 24 Palo Alto Networks Panorama
- Well documented: yes
- Runs where you work: no
- 25 Radware Alteon
- Well documented: yes
- Runs where you work: no
Compare all 25 in a table
| # | Platform | Score | Free plan | Free plan | Paid from | Deployment model | Network scope |
|---|---|---|---|---|---|---|---|
| 1 | CrowdSec | 8.0 | Free plan | Yes | 49 /mo | hybrid | multi-scope |
| 2 | Wazuh | 7.8 | Free plan | Yes | 571 /mo | ||
| 3 | OSSEC | 7.7 | Free plan | Yes | hybrid | multi-scope | |
| 4 | pfSense | 7.6 | Free plan | Yes | hybrid | ||
| 5 | Suricata | 7.1 | Free plan | Yes | software | network | |
| 6 | Arista NG Firewall | 7.0 | Free plan | Yes | 25 /mo | hybrid | |
| 7 | SELKS | 7.0 | Free plan | Yes | software | network | |
| 8 | WatchGuard FireCloud | 7.0 | No | hybrid | |||
| 9 | Snort | 6.9 | Free plan | Yes | software | network | |
| 10 | Atomic OSSEC | 6.8 | No | No | 5 /mo | hybrid | multi-scope |
| 11 | scanlogd | 6.8 | Free plan | Yes | software | multi-scope | |
| 12 | Stormshield Management Center | 6.8 | hybrid | ||||
| 13 | IPFire | 6.7 | Free plan | Yes | hybrid | ||
| 14 | OPNsense | 6.7 | Free plan | Yes | hybrid | ||
| 15 | Trellix Data Loss Prevention | 6.7 | hybrid | multi-scope | |||
| 16 | Zscaler Private Access | 6.7 | cloud | network | |||
| 17 | Check Point DDoS Protector | 6.5 | hybrid | multi-scope | |||
| 18 | RdpGuard | 6.5 | No | No | software | host | |
| 19 | Hillstone Security Management | 6.3 | appliance | network | |||
| 20 | Huawei HiSecEngine USG6800G | 6.3 | appliance | network | |||
| 21 | Securepoint RC1000R G6 | 6.2 | No | appliance | network | ||
| 22 | Clear NDR - Enterprise | 6.1 | No | hybrid | network | ||
| 23 | Forcepoint ZTNA | 6.1 | hybrid | ||||
| 24 | Palo Alto Networks Panorama | 6.1 | No | hybrid | multi-scope | ||
| 25 | Radware Alteon | 6.1 | hybrid |
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