Entrepreneurs to Watch in 2013

jdlasica/Flickr, Courtesy Company
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Jack Dorsey

When it debuted, Square’s sleek plastic credit card swiper drew jealous looks to any iPhone it was attached to. Now Jack Dorsey has bet again that style wins mobile payments customers. In October the company followed a $200 million venture round by acquiring New York design firm 80/20, which specializes in slick user interfaces. Earlier, it partnered with coffee chain Starbucks, further upping the brand’s profile.