If there was ever a start-up success story, it’s Instagram. The photo sharing superpower was founded in 2010 by 28-year-old Kevin Systrom who had recently graduated from Stanford University, interned at Twitter, and worked at Google – an impressive background, to say the least. After only a few hours of Instagram going live, it already had more than 10,000 users. By the end of the first week, the app had been downloaded more than 100,000 times. Once the three-month mark rolled around, the community had grown to a million.