Best Industries 2012: Internet Publishing | 5 Powerhouse Start-ups to Watch

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Instagram

The photo-sharing app is the perfect example of scalability within this industry. Launched in 2010, Instagram, often praised for its elegant user-interface and superior mobile function, gained millions upon millions of users in 2011. The company does not generate revenue, but that didn't stop Facebook from acquiring it in April for a staggering $1 billion (shortly after the company received $50 million in Series B funding.) This year, the company captured its 40 millionth user.