🧱 Free Firewall Tools Tools 2026
4 firewall tools tools you can use for free — no credit card required. Includes fully free tools and freemium tiers with generous limits.
- 1
pfSense is a free, open-source firewall and router distribution based on FreeBSD, widely used for enterprise network security.
Best for: Best for users wanting network-level firewall protection
- 2
OPNsense is a fork of pfSense offering an open-source firewall and routing platform with modern web interface and plugins.
Best for: Best for users wanting network-level firewall protection
- 3
GlassWire is a network monitor and firewall that visualizes traffic and alerts on suspicious connections.
Best for: Best for users wanting network-level firewall protection
- 4
Arista Edge Threat Management is a modular network security platform with firewall and threat protection for small and mid-sized organizations and distributed networks.
Best for: Best for users seeking privacy and security tools
What counts as free?
Every tool on this page has either a fully free plan or a freemium tier that doesn't require a paid subscription to start. We list features, limits, and upgrade paths on each tool's detail page so you know exactly what the free plan includes.
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