Garrett is a serial entrepreneur and investor based in San Francisco. Garrett is Chairman & Co-founder of Uber, an on-demand car service available in 30 cities across North America and Europe. Garrett is also Chairman and Co-founder of StumbleUpon, a web discovery platform he grew to over 25 million registered users as its founding CEO. Garrett completed his Masters in Software Engineering at the University of Calgary, where he researched collaborative systems, evolutionary algorithms and information retrieval. He is also a 2007 recipient of MIT Technology Review’s TR35 award.