LuLu by Objective-See Alternatives
LuLu by Objective-See is described as 'LuLu is the free, shared-source macOS firewall that aims to block unknown outgoing connections unless explicitly approved by the user' and is an app in the Network & Admin category. There are eight alternatives to LuLu by Objective-See for Mac, Android, Android Tablet and Linux. The best alternative is Little Snitch. It's not free, so if you're looking for a free alternative, you could try OpenSnitch or AFWall+. Other great apps like LuLu by Objective-See are NetGuard (Freemium, Open Source), Radio Silence (Paid), Hands Off! (Paid) and Stronghold (Free, Open Source).