Estimates of data growth are generally difficult to come by, but Cisco estimates that traffic over the Internet will grow by over 20% a year between 2015-20209, and that by 2021, global IP traffic will reach an annual run rate of 3.3 zettabytes. Cisco also projects that, by 2021,80% of all Internet traffic will be video, up from 67% in 2016. Viber (owned by Rakuten) currently offers calling, video and messaging services to over 800 million people11.