WhatsApp Enters the Business Messaging Space: Why Should You Care?
Opinion: The number of messages sent every day is over three times peak global SMS volume

There’s been huge pent-up demand from businesses to start offering WhatsApp as a customer-service channel
WhatsApp
On Feb. 24, 2009, Jan Koum incorporated WhatsApp Inc. in California and began developing what would become the biggest messaging application in the world within just a few years.