Instagram has added 100 million users in just nine months, announcing just yesterday that the platform now has 400 million users worldwide. We’ve tracked the network’s steady growth in our own social media tracker, and its star only continues to rise with Millennials and teens. Facebook’s “consumer app collection” boasts an impressive combined user base. In addition to Instagram, 700 million use Facebook Messenger, and 900 million use WhatsApp. (recode)
