In just eight months, Line has gone from a glimmer in Naver's eye to a 20 million member strong VoIP and messaging service. Perhaps most impressively, it's done so with only iPhone and Android apps available. The company is working on PC, Mac and tablet clients, but for now this is a mobile phone-only app. The speed at which its growing is significantly faster than both Facebook and Twitter, a fact the company is immensely proud of -- but, we wouldn't read to much into that.Naver's Skype competitor Line crosses 20 million mark originally a
