24. Josh Miller, Hursh Agrawal, and Cemre Güngör

Cofounders, Branch

Josh Miller, Hursh Agrawal, and Cemre Güngör cofounded Branch as a relaunched version of Roundtable, their former project, in February 2012.

Branch, a group-discussion platform, was acquired by Facebook in January for $15 million. The Branch team is now in London working on a stealth Facebook product.