TripMode is described as 'Block internet connection for apps' and is an app in the Network & Admin category. There are six alternatives to TripMode for Mac, Windows, Linux, Android and Android Tablet. The best alternative is Little Snitch. It's not free, so if you're looking for a free alternative, you could try OpenSnitch or NetGuard. Other great apps like TripMode are Radio Silence (Paid), ZoneAlarm Firewall (Freemium) and Hands Off! (Paid).