Messaging = Extensibility Expanding Messaging Messenger MAUs Tencent (2000  2018) 1.5B QQ WeChat 1.0B 0.5B 0 2011 2012 2013 2014 2015 2016 2017 WhatsApp Facebook Messenger WeChat Instagram Twitter Source: Facebook, WhatsApp, Tencent, Instagram, Twitter, Morgan Stanley Research. Note: 2013 data for Instagram & Facebook Messenger are approximated from statements made in early 2014. Twitter users excludes SMS fast followers. 22 MAUs (Monthly Active Users) are defined as users who log into a messenger on the web or through an application.