Luis von Ahn is a Guatemalan computer scientist and tech entrepreneur. At the beginning of the century, he worked with Manuel Blum to invent CAPTCHAs, computer-generated tests that humans are routinely able to pass but that computers have not yet mastered. CAPTCHA is used mostly for online security, though has proven useful in other ways. In 2007, von Ahn founded reCAPTCHA, which utilized CAPTCHA technology to help with the digitization of books. ReCAPTCHA was sold to Google in 2009.
Von Ahn's latest venture is Duolingo, a free language-learning software for which he is Co-Founder and CEO.
Von Ahn is a graduate of Duke University, earned his Ph.D from Carnegie Mellon University, and serves on the faculty at the Carnegie Mellon School of Computer Science. He was awarded a MacArthur Fellowship in 2006, the David and Lucile Packard Foundation Fellowship in 2009, a Sloan Fellowship in 2009, and a Microsoft New Faculty Fellowship in 2007, and the Presidential Early Career Award for Scientists and Engineers in 2012.