On Wednesday, Facebook announced that Messenger had passed 1 billion monthly active users.
This chart from Statista shows how utterly Facebook dominates online communications. It now has the three top communications platforms - the core Facebook app, WhatsApp, and Messenger - all of which have more than a billion monthly users, plus Instagram, which comes in at 500 million. The only other company in the running is China's Tencent, with WeChat and Qzone.
Not shown on this chart: Microsoft's Skype, which also comes in around 300 million, and LINE, the biggest tech IPO of 2016 so far, which is around 215 million, according to Statista.
Statista