VPNSpotter
Free · 2026

🧱 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. 1
    P

    pfSense

    Free

    Open-source firewall/router based on FreeBSD.

    4.7 (268)

    Open-source firewall/router based on FreeBSD.

    View pfSense→
  2. 2
    O

    OPNsense

    Free

    Open-source firewall with modern web UI and plugin system.

    4.6 (398)

    Open-source firewall with modern web UI and plugin system.

    View OPNsense→
  3. 3
    G

    GlassWire

    From €0/mo

    Network monitoring and firewall with visual interface.

    4.4 (404)

    Network monitoring and firewall with visual interface.

    View GlassWire→
  4. 4
    U

    Untangle

    From €0/mo

    Network security gateway with web-based management.

    4.2 (311)

    Network security gateway with web-based management.

    View Untangle→

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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