How many users do the messaging apps have?

There are numerous messaging applications such as facebook messenger, WhatsApp, WeChat. This list shows the leading messaging apps (also known as OTT Messaging) and the number of registered users and the number of monthly active users (MAU)

Messaging ApplicationRegistered UsersMonthly Active Users
WhatsApp1,000 Million
WeChat1,100 Million650 Million
Facebook Messenger900 Million
Viber750 Million
LINE560 Million212 Million
Instagram500 Million
Skype300 Million
iMessage (Apple)250 Million
Tango250 Million
Kik250 Million
Kakao Talk170 Million
Telegram100 Million