Founded in 2010, Instagram quickly became a massive hit with the public. After 2 years Systrom and Krieger decided to sell to Facebook for $1 billion. Instagram also beat the Social media giant (Facebook) in the amount of time it took to reach 50 million users (Instagram took 19 months, while Facebook took 2 years). Currently there are 1 billion active users on Instagram every month, 20 times more than it was about 7 years ago.