Startup Founders to Watch in 2014

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Jack Dorsey | Square

Why he’s important: Dorsey’s mobile payments startup set the standard for everyone else. Last we checked, it was processing $10 billion annually. Meanwhile, more than 40,000 retailers were using its mobile card readers.

Watch for: An IPO as soon as next year, according to The Los Angeles Times. Today Square is used at more than 250,000 locations in the U.S. and Canada.