According to the CEO Jan Koum Whatsapp exceeded 600 million monthly active users
Following its acquisition by Facebook, the popular application Whatsapp seems to become more and more of the market since it has now over 600 million. Active users exchange messages.
In second place is the application Wechat with 438 million users. While Viber comes in third with just 100 million users.
Do not forget also that Whatsapp now belongs to Facebook, and it seems that this service should somehow bring profits to the popular social network in which a few months ago it was bought for 19 billion dollars $.
Whereas Jan Koum (CEO & Founder) is against bringing in ads or games to the service, Facebook will have its work cut out if it is to realize financial returns on the $19 billion investment it put in to buy WhatsApp.