CrowdSec
by CrowdSecCrowdSec suits teams seeking to detect or block malicious IP activity across infrastructure and applications.
Free plan Free trial Open source From $49 a month iPhone & iPadWebWindowsMacLinuxBrowser extension+2
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Best Intrusion Detection and Prevention Software 2026
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.
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Wazuh
Wazuh describes its users as ranging from individuals and small businesses to large enterprises.
WebWindowsMac+3 Record6.3 Visit
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OSSEC
OSSEC suits teams that need host and network-component monitoring across multiple operating systems, including for PCI or HIPAA requirements.
WindowsMacLinux+2 Record6.1 Visit
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IPFire
IPFire is presented for individuals, businesses, and organizations managing networks from home offices to global enterprises.
WebLinuxAPI+1 Record6.0 Visit
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OPNsense
OPNsense suits administrators seeking a self-hosted firewall and routing platform with VPN, failover, and intrusion-prevention capabilities.
AndroidiPhone & iPadWeb+2 Record6.0 Visit
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pfSense
WebLinuxSelf-hosted Free plan Record5.7 Visit pfSense suits home and remote workers, businesses, government, education and service providers seeking firewall and routing software.
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SELKS
WebWindowsLinux+1 Free plan Record5.1 Visit SELKS may suit small-to-medium organizations and practitioners, researchers, educators, students, or hobbyists exploring Suricata.
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Arista NG Firewall
Web Free plan Record5.0 Visit It suits organizations managing network security and traffic across hybrid deployments.
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Securepoint RC1000R G6
AndroidiPhone & iPadWeb+1 — Record4.4 Visit This appliance suits medium-sized companies, public authorities, and medical facilities securing networks for up to 1,000 users.
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scanlogd
LinuxSelf-hosted Free plan Record4.3 Visit It suits Linux administrators and self-hosted operators who need TCP port scan detection.
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Forcepoint Next Generation Firewall
AndroidWindowsMac+3 — Record4.2 Visit It is positioned for large enterprises, campus networks, data centers, offices, branches, remote sites, and stores that need network security and SD-WAN connectivity.
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Stormshield Management Center
WebLinuxAPI+1 — Record4.2 Visit SMC suits administrators responsible for multi-site networks built around Stormshield SNS firewalls.
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Huawei HiSecEngine USG6800G
Web — Record3.7 Visit It suits organizations seeking centralized network security for branches, campuses, or data centers.
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Juniper Security Director
WebSelf-hosted — Record3.7 Visit This product suits organizations managing Juniper SRX firewalls across on-premises, cloud, or hybrid environments.
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