Meet the 30 Under 30 Coolest Entrepreneurs

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18 of 30

Adam Goldstein and Steve Huffman, Hipmunk

Just last year, recent grad Adam Goldstein approached Reddit founder Steve Huffman with an idea: a radically simplified, painless, travel-search website. With seed funding from Y Combinator followed by more than $5 million in seed and Series A funding, the pair set up an office in San Francisco's Hamm's building and set to work creating Hipmunk, a site that ranks flights based on the agony they would inflict on the traveler. Read more.