Viber is alive and well nowadays and is the dominant messaging app in quite a few geographies. Given that Facebook Messenger seems to also have about the same MAU as WhatsApp (and seems to be dominant in the US), I don't think you can say any one of those "won".
>> Viber is alive and well nowadays and is the dominant messaging app in quite a few geographies
Interesting! I haven't heard mention of Viber since around 2011. When I said WhatsApp 'won' I meant that wherever I have been in Europe WhatsApp seems to be in use by people and by businesses. It's almost accepted you'll have an account and used as an alternative to email/phone numbers. I understand global MAU may show a different reality and certain locales may still be dominated by other platforms.
