Meet 30 Cool Young Entrepreneurs

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18 of 30

The Founders of Venmo

Former University of Pennsylvania roommates Iqram Magdon-Ismail, 26, and Andrew Kortina, 27, started Venmo as a way to pay one another back for, say, a round of drinks or a tank of gas. Their venture-backed Philadelphia start-up operates a peer-to-peer mobile payment system that allows trusted friends to register and transfer money to one another securely. Read more.