There are many alternatives to Comodo Free Firewall for Windows if you are looking for a replacement. The best Windows alternative is Portmaster, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Comodo Free Firewall and many of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Comodo Free Firewall are simplewall, Fort Firewall, BiniSoft Windows Firewall Control and TinyWall.