FireWally is described as 'Free firewall app for Mac, powered by Apple Intelligence and designed for anyone who wants to take full control of their online activity' and is a Firewall in the security & privacy category. There are more than 10 alternatives to FireWally for a variety of platforms, including Mac, Linux, Android, Android Tablet and F-Droid apps. The best FireWally alternative is Portmaster, which is both free and Open Source. Other great apps like FireWally are NetGuard, Little Snitch, LuLu by Objective-See and OpenSnitch.