WhatsApp, the messaging service that lets you text other users for free, now has 800 million active users every month. The app sends messages over the internet, bypassing a phone carrier’s text messaging charges.
WhatsApp is a solid poster boy for spectacular dotcom success, going from zero value as a start-up company in 2009 to the point at which Facebook hoovered it up for a tidy $19bn in 2014. Not bad for five years’ work, all told.
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