Instant messaging

Columns: Instant messenger client | Company | Usage
Discord | Discord inc | 250 million users ( May 2019 ) | eBuddy XMS | eBuddy | 250 million users ( September 2011 ) | Facebook Messenger | Facebook | 900 million active users ( April 2016 ) | iMessage | Apple Inc | 140 million users ( June 2012 ) | Kik Messenger | Kik Interactive | 300 million users ( May 2016 ) | Line | Naver Corporation | 217 million monthly active users ( 2016 ) | Skype | Microsoft | 300 million monthly active users ( 5 June 2019 ) , 1.55 billion registered users ( 2019 ) , 4.9 million daily active users ( 2 March 2014 ) , 34 million peak online ( February 2012 )

Example questions:
Which Japanese company has instant messenger software with more than 100 million usersthat was developed in 2010 by Israel-based Viber Media ? | What year did the company headquartered in Cupertino , California launch their instant messaging service with more than 100 million users ? | When was the instant messaging telecommunications application with more than 100 million users , from the company founded by Bill Gates and Paul Allen , first released ? | Who founded the camera and social media company responsible for the instant messaging app that has 210 million daily active users ?

Answers:
Rakuten | 2011 | August 2003 | Evan Spiegel and Bobby Murphy