The proximity-based dating app, which has racked up 6 million users, has followed up its $8m series A with an Idinvest-led series B that will support international growth.

France-based dating app developer Happn raised $14m yesterday in a series B round led by corporate-backed private equity firm Idinvest Partners.

IdInvest, which counts insurer Allianz, media group Lagardère and recruitment firm Up Group among its limited partners, was joined in the round by Alven Capital, DN Capital, Raine Ventures and angel investors including Fabrice Grinda, David Wolfson and Gil Penchina.

Happn has built a mobile dating app similar to Tinder, but based on proximity so that users can match…