49. Bradford Cross, Aria Haghighi

Co-founders, Prismatic

Prismatic has been touted as one of the most disruptive apps of 2012. Prismatic, an app for reading news on your iPhone, is the brainchild of Bradford Cross and Aria Haghighi.

Together, they're attacking the problem of finding relevant news and content. Already, investors are flocking to the social news reader. In December, Prismatic raised $15 million from Facebook investors Jim Breyer and Yuri Milner.