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 Application | Registered Users | Monthly Active Users |
|---|---|---|
| 1,000 Million | ||
| 1,100 Million | 650 Million | |
| Facebook Messenger | 900 Million | |
| Viber | 750 Million | |
| LINE | 560 Million | 212 Million |
| 500 Million | ||
| Skype | 300 Million | |
| iMessage (Apple) | 250 Million | |
| Tango | 250 Million | |
| Kik | 250 Million | |
| Kakao Talk | 170 Million | |
| Telegram | 100 Million |