If you’re a Telegram or Viber user and wondering why there’s no one else to message, the answer could lie in new data on the global usage of different messenger apps on Android.

Research from analytics firm SimilarWeb shows that the Facebook-owned WhatsApp is currently the world leader, being the most popular messaging app in 109 countries. Facebook’s own Messenger app is a distant second, topping the charts in 49 countries.

These two apps greatly outdid other messaging apps such as Viber, Line, WeChat and Telegram, though Viber is the only one of the four to claim more than ten countries.

Some apps dominate in their home country but nowhere else, as in the case of KakaoTalk in South Korea and BBM in Indonesia.