Whitney Wolfe: Cofounder and former vice-president of marketing, Tinder

Age: 26

About: Whitney Wolfe is the only female cofounder of a major social network. Wolfe came up with Tinder's name, and was also responsible for marketing the app on college campuses, which led to crazy growth for Tinder.

Wolfe resigned from Tinder in April 2014 after filing a lawsuit against Tinder co-founders Justin Mateen and Sean Rad, who she alleges sexually harassed her. In September, she settled the case for an undisclosed amount. Wolfe worked for customer loyalty startup Cardify, but she joined Tinder in 2012 when it pivoted from Cardify.