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Best Firewall Software in 2026

  1. 1

    OPNsense

    by OPNsense
    Free plan Open source AndroidAPIiPhone+2

    OPNsense combines firewall, routing, VPN, failover, and intrusion-prevention features in a self-hosted platform.

    9.3 Free plan Visit site
  2. 2

    IPFire

    Free plan Open source APILinuxSelf-hosted+1

    IPFire brings firewalling, VPN, intrusion prevention, and proxy functions together in a free, open-source platform.

    9.2 Free plan Visit site
  3. 3

    CrowdSec

    by CrowdSec
    Free plan Open source APIExtensioniPhone+5

    CrowdSec combines local behavior analysis with IP blocking and optional application protection.

    9.0 Free plan · paid from $49/mo Visit site
  4. 4

    NethSecurity

    by NethSecurity
    Free plan Open source APILinuxSelf-hosted+1

    NethSecurity combines several network security and traffic management functions, with an optional remote management controller.

    8.9 Free plan · 30-day trial Visit site
  5. 5

    OpenWrt

    by OpenWrt
    Free plan Open source AndroidAPILinux+2

    Choose OpenWrt if you want a free Linux system for an embedded device and are comfortable checking compatibility and configuring it.

    8.9 Open source Visit site
  6. 6

    OpenSnitch

    Free plan Open source LinuxSelf-hosted
    8.6 Free plan Visit site
  7. 7

    VyOS

    by VyOS
    Free plan APILinuxSelf-hosted

    Choose VyOS if you need an open-source networking operating system with extensive routing, firewall, VPN, and automation options.

    7.5 Free plan Visit site
  8. 8

    Comodo Internet Security

    by Comodo Internet Security
    Free plan AndroidExtensioniPhone+1

    Comodo Internet Security pairs core protection with isolated browsing and application use. Check the listed Windows-version limits before choosing it for an older PC.

    7.5 Free plan · paid from $29.99/yr Visit site
  9. 9

    Google Cloud NGFW

    Free plan APIWeb
    7.4 Free plan · paid from $0.02 Visit site
  10. 10

    SonicWall Network Security Manager

    by SonicWall Network Security Manager
    Free plan APISelf-hostedWeb

    NSM brings firewall administration, search, and security checks into a centralized system for SonicWall environments.

    7.4 Pricing on request · 30-day trial Visit site
  11. 11

    pfSense

    by pfSense
    Free plan LinuxSelf-hostedWeb

    Choose pfSense if you want an open-source firewall and router distribution with a web interface, package extensions, and several deployment options.

    7.4 Free plan · 30-day trial Visit site
  12. 12

    firewalld

    Free plan APILinuxSelf-hosted
    7.3 Free plan Visit site
  13. 13

    GlassWire

    by GlassWire
    Free plan AndroidWebWindows

    GlassWire combines traffic visibility with firewall controls, while its Android app focuses on app data use and connections.

    7.3 Free plan · paid from $2.99/mo (annual) Visit site
  14. 14

    Portmaster

    Free plan LinuxMacWindows
    7.3 Free plan · paid from €8/mo Visit site
  15. 15

    Shorewall

    Free plan LinuxMacSelf-hosted+1
    7.3 Free plan Visit site
  16. 16

    Arista NG Firewall

    by Arista NG Firewall
    Free plan Web

    Arista NG Firewall offers a free tier and a broader Complete package for network visibility and appliance management.

    7.2 Free plan · paid from $25/mo · 30-day trial Visit site
  17. 17

    ClearOS

    Free plan LinuxSelf-hosted
    7.2 Free plan · 30-day trial Visit site
  18. 18

    Zentyal Server

    by Zentyal Server
    Free plan Linux
    7.1 Free plan · paid from $230/yr · 15-day trial Visit site
  19. 19

    Endian Firewall Community

    by Endian Firewall Community
    Free plan LinuxSelf-hosted

    Endian Firewall Community combines firewall, VPN, email security, antivirus, intrusion prevention, traffic management, and reporting for smaller environments.

    7.1 Free plan Visit site
  20. 20

    iptables

    by iptables
    Free plan LinuxSelf-hosted
    7.1 Free plan Visit site
  21. 21

    Smoothwall Express

    by Smoothwall Express
    Free plan LinuxSelf-hostedWeb
    7.1 Free plan Visit site
  22. 22

    ZoneAlarm Free Firewall

    by ZoneAlarm Free Firewall
    Free plan Windows
    7.0 Free plan Visit site
  23. 23

    TinyWall

    Free plan Windows

    TinyWall offers firewall controls and connection visibility for supported Windows desktops.

    7.0 Free plan Visit site
  24. 24

    RethinkDNS

    Free plan AndroidWeb

    RethinkDNS combines DNS filtering with Android firewall controls and connection reporting. Its blocking is not universal, and RPN is a separate paid offering.

    7.0 Free plan Visit site
  25. 25

    TNSR

    by TNSR
    Free plan APILinuxSelf-hosted

    TNSR offers extensive routing, VPN, management, and monitoring capabilities for Linux deployments.

    7.0 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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