Max Levchin is a computer scientist and Internet entrepreneur. In 1998 he co-founded and was CTO of PayPal, where he was the co-creator of the Gausebeck-Levchin test, one of the first commercial implementations of CAPTCHA. In 2011, Levchin started HVF (Hard, Valuable, and Fun), a venture to fund projects and companies in the area of leveraging data. Levchin co-founded Affirm in 2012, with the goal of building the next generation credit network. In 2013, he launched Glow, a fertility app that helps couples conceive naturally. Levchin also is the chairman of Yelp and is on the board of directors of Yahoo.