Meet the 30 Under 30, Class of 2013

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GitHub

P.J. Hyett (left) and Chris Wanstrath (right) built GitHub, a portal that lets Web developers collaborate on each other's coding projects. Uploading open-source code for the public is free, but enterprise clients such as Microsoft, Walmart, and Lockheed Martin pay GitHub to keep their code out of public view, sharing it only among their own teams. The result: 300 percent year-over-year growth and a whopping $100 million in Series A funding from Andreessen Horowitz.

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