Free & Open-Source Little Snitch Alternatives

Mac application firewall and network monitor.

1. OpenSnitch ↗ ★ PICKFOSSPRIVATE
   GUI application firewall for Linux.
   ●●○Medium · Requires self-hosting
2. Portmaster ↗ FOSSPRIVATE
   Privacy firewall for Windows + Linux.
   ●●○Medium · Requires self-hosting
3. GlassWire Free ↗
   Free network monitor for Windows.
   ●●○Medium · Requires self-hosting