Most Used Instant Messengers

As defined by wikipedia, real-time text transmission over the internet. Which ones claim the most users?
Source: https://en.wikipedia.org/wiki/Instant_messaging
Quiz by xtremesecretary
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Last updated: November 14, 2017
First submittedNovember 14, 2017
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Usage (as of date)
Answer
1200+ million (September 2011)
XMPP
1200 million monthly active users (January 2017)
Whatsapp
900 million active users (April 2016)
Facebook Messenger
889 million users (2016)
WeChat
330 million active monthly (June 2009)
Windows Live Messenger
250 million users (September 2011)
eBuddy
217 million monthly active users (2016)
Line
176+ million peak online users, 840+ million "active" (Q2 2009)
QQ
140 million users (June 2012)
iMessage
100 million monthly active users (2016)
Telegram
91 million total users (October 2014)
Blackberry Messenger
34 million peak online (February 2012), 560 million total (April 2010)
Skype
25 million users (December 2016)
Discord
24 million registered users (January 2014)
Xfire
22 million users (Unknown)
Yahoo! Messenger
15 million (enterprise) users (Unknown)
IBM Sametime
11 million total users (July 2014)
ICQ
7.4 million monthly subscribers (majority in South Africa) (July 2013)
MXit
6.5 million users active daily (majority in Poland) (June 2010)
Gadu-Gadu
5.5 million monthly unique users
Paltalk
2.2 million active users (February 2015)
AIM
1 million users (June 2007)
IMVU
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