Dating apps like Tinder, Hinge, Bumble, and Grindr are placing big bets on AI-powered matchmaking. They are hoping innovations in the space can combat the app fatigue that has stymied growth.

Facebook’s free dating service has 21 million users, more than the popular dating app Hinge, as the social network reinvents itself. By Eli Tan Reporting from San Francisco For years, Alyssa Landguth, ...