39. Justin McLeod

Founder, CEO, Hinge

Justin McLeod’s free dating app Hinge matches you with Facebook users you’re connected to via mutual friends. It has been around for a year, and in March, it made its 1 millionth match.

Founded in 2011, Hinge raised $4.5 million this July from investors like Great Oaks Venture Capital, Middleland Capital, Lumia Capital, CAA Ventures, Lowercase Capital, and Founders Fund.

Lately it's started to steal some of the conversation away from Tinder as a cooler alternative with less noise than the IAC-owned app. "Hinge cuts through the randomness of Tinder,” one daily user told The New York Times in March. “I can take some comfort that she knows some of the same people I do.”