Back in Skype's early days, it was adding users so fast that it liked to boast that it was "the fastest growing, globally available communications tool in history." Well, by at least one measure (registered users 9 months after launch), mobile video chat service Tango is outpacing Skype. Tango now has 17 million registered users across both Apple and Android devices, only 9 months after it launched. By comparison, Skype celebrated 9 million users on its first birthday back in 2004.

Today, [...]

Read More: With 17M Registered Users, Tango Is Growing Twice As Fast As Skype Did Its First Year