WhatsApp is an amazing success story. Released only five years ago, the app now boasts over 600 million monthly active users. In early 2014 it was acquired by Facebook in a phenomenal $19 billion cash and stock deal. The ad-free mobile messaging app allows users to exchange text and media messages through their smartphones. This info-graphic created by our content and design teams charts the short history of WhatsApp, looks at the founders and examines possible competitors.