Sam Altman is the president of Y Combinator, a startup accelerator that has helped launch companies such as Reddit, Dropbox, and Airbnb. Since 2011, he was a part-time partner at Y Combinator. He is also the chairman of the board at two nuclear energy companies: Helion Energy and UPower. When Altman was just 19, he founded a location-based social networking company called Loopt, later sold to Green Dot for $43 million, with the help of YC. Since then, he’s become known as a notable entrepreneur and venture capitalist who has been recognized in Inc. magazine's Top 30 Entrepreneurs Under 30 and Businessweek's Tech's Best Entrepreneurs. Recently, Altman teamed up with Elon Musk to create a nonprofit venture called OpenAI, a research lab aimed at keeping large governments and corporations (and their potentially oppressive uses of artificial intelligence) in check.