828 million active users as of early 2015. This is a more than healthy result achieved by a product of one of Asia’s largest telecommunication companies Tencent, namely its instant messaging service called QQ.
The messenger’s predecessor was available back in 1999 and any modern web surfer knows it under the name ICQ.
More info:
APPMESS REVIEW: QQ MESSENGER - http://appmess.com/reviews/27565-appm...
IS QQ BEATING WECHAT? - http://appmess.com/news/27118-is-qq-b...
Video Review - • AppMess Review: QQ Messenger