The best alternatives to 7 Minute Chat are Reveal, Bubi Chat, and BlabRoulette. If these 3 options don't work for you, we've listed a few more alternatives below.
Bubi is the most fun way to chatting with other people at a location 👻 Bubi access your location and it shows nearby places as chat rooms. You can enter this room and chat with other people as anonymously.
Macarons is your virtual watercooler for casual conversations with colleagues you rarely meet on the hallway. Just add the Macarons app to a Slack channel and it will automatically pair off random members for having a casual chat over coffee.