Telegram (messaging app): 200,000,000 Monthly Active Users

Telegram has reached 200 million monthly active users. More than 500,000 new users join daily.

Telegram became the first messaging app to roll out end-to-end encryption to tens of millions of users in 2013. This was also the reason why Telegram became the first mainstream messaging app to fully open source its client code, and why Telegram became the first popular messenger to provide 100% open APIs for third party app and bot developers.