Sam Altman is president of Y Combinator and was the cofounder of Loopt, a location-based social networking app, which was part of YC's first batch in 2005 and acquired by Green Dot in 2012.
Prior to taking over as Y Combinator's president, Sam was a part-time partner at Y Combinator since 2011. You can read Sam's essays on startups and technology at his blog.
Sam has consistently been recognized for his entrepreneurship. He was featured in Inc. Magazine's Top 30 Entrepreneurs Under 30 and BusinessWeek's Tech's Best Entrepreneurs.
As an early innovator in mobile location services, Sam joined Apple CEO Steve Jobs on stage at WWDC 2008, presenting Loopt as one of the first applications in the iPhone App Store.
Sam has been a valuable source for many media outlets including Charlie Rose, CNN, The Economist, New York Times, Wall Street Journal and numerous others.