Instagram Hits 400 Million Monthly Active Users

Instagram holds itself as the second biggest social media site in the world. They just hit 400 million monthly active users, which puts Facebook's services at about 3.5 billion monthly users. These users definitely have some overlap, but that's still a large user base. Instagram's community has over 75% outside of the U.S. and more than half of the last 100 million signups were made in Europe and Asia.