The San Francisco-based company sent an email to approx. 6 million of the users to inform them of an "unauthorized party" accessing names and email addresses.
The company did not say who was responsible for the breach but said it employed a security company to conduct a review of its systems.
Coffee Meets Bagel, launched in 2012, was built on the idea of dating friends to your friends – connections made by signing up for a Facebook account. In 2018, after the Cambridge Analytica scandal showed Facebook user data on tens of millions of Americans accessed without their explicit knowledge, Coffee Meets Bagel introduced an alternative to signing up with a mobile number instead of using social network.
Coffee Meets Bagel is one of a few popular computer programs that are not owned by Match Group, the holding company for services like Tinder, OKCupid and Match.com.