Messaging, it is clear now, is the killer app on mobile. These apps are growing at a rate not seen since the early days of social networking in the mid-2000s, when Cyworld, Mixi, Friendster, Bebo, Orkut, MySpace, and Facebook jostled to create the world’s biggest social graph, a web of connections that personalized the Internet. WeChat, not yet three years old, has more than 270 million active users. WhatsApp has 350 million active users. Line and KakaoTalk count their users by registered accounts. The former passed 300 million the other day; the latter has 110 million. Seldom mentioned among this clutch of frontrunners, however, is the app that I think could be the dark horse of the Internet – a potential bolter that has built a deep and defensible moat around its product, and one that has zagged when all others have zigged. (Okay, so in that orgy of mixed metaphors we’ve got horses building moats while running from side to side. Um, forgive me?) This app, while it faces very real challenges, has locked down key advantages in its technology and it is starting to deliver the kinds of numbers that, if they were emanating from Silicon Valley, would be the chatter of the venture capital community, if they could only shut up about Snapchat for five minutes. That app hails from Waterloo, Ontario. It is called Kik.