of PayPal who have become referred to as the "PayPal Mafia", due to their success in founding and investing in tech companies after leaving PayPal. Slide In 2004, Levchin founded Slide, a personal media-sharing service for social networking sites such as Myspace and Facebook. Slide was sold to Google in August 2010 for $182 million and, on August 25, Levchin joined the company as vice president of engineering. On August 26, 2011, Google announced it was shutting down Slide, and that Levchin was leaving the company. HVF and Affirm In late 2011, Levchin started a company called HVF (standing for "Hard, Valuable, and Fun") that was intended to explore and fund projects and companies in the area of leveraging data, such as data from analog sensors. In early 2012, the financial technology company Affirm was spun out of HVF, with the goal of building the next-generation credit network. Affirm was created by Levchin, Palantir Technologies co-founder Nathan Gettings, and Jeff Kaditz of First Data. The company is based in San Francisco. In 2013, HVF launched Glow, a fertility app that helps couples conceive naturally. After Affirm had its initial public offering, Levchin's stake was estimated at about $2.5 billion. Board memberships and investments Levchin was a key early investor in Yelp, an online social networking and review service that started in 2004. He was the company's largest shareholder, owning more than 7 million shares as of 2012. Levchin served as chairman of Yelp's board of directors from its founding until July 2015. Levchin is an investor in Evernote. He served on the company's board of directors from August 7, 2006, to 2016. In December 2012, Levchin joined Yahoo's board of directors, and served until December 2015. In 2015, Levchin was appointed to the U.S. Consumer Financial Protection Bureau (CFPB) advisory board for a three-year term, making him the first executive from Silicon Valley to be appointed to the board. In 2021, Levchin, after his experience on the advisory board at the CFPB, called for the necessity for the tech industry to engage more with regulators. As of 2021 Levchin had an estimated net worth of a little over $3 billion USD. In the media Levchin appeared as a speaker at the 2007 Startup School organized by Y Combinator, where he described his own journey as an entrepreneur and the mistakes he made and lessons he learned. Levchin was also featured