He also made the revelation that these users now send 30 billion messages everyday.
This has resulted in the Facebook messenger App reaching 500 million active users and taking the second spot.
The social giant has now cornered both the top spots as far as instant messaging is concerned.
Whatsapp also made the announcement that it will finally be adding voice calling facility in February of this year.
Facebook announced its acquisition of WhatsApp in February 2014 for $19 billion in a stock and cash deal.
Mark Zuckerberg feels that every service needs to reach the billion user mark before it can sustain itself independently.
Not all Facebook investors might agree to his views though.
source: www.techworm.net