Facebook’s decision to pay up to $19bn for messaging app WhatsApp is far from the only big news story in the messaging market, which is booming worldwide. Chinese technology giant Tencent announced yesterday that its WeChat app (known as Weixin in China) ended 2013 with 355m active users, more than doubling its total year-on-year. The company is expected to add videos and related content into WeChat this year, which could be an opportunity for the music industry if the company looks beyond longform content and adds music videos too. Meanwhile, also in China, e-commerce firm Alibaba has led a monster $280m funding round in another messaging app, Tango. Alibaba chipped $215m into the round for the app, which also offers Skype-like video and voice calling. Tango claims 70m monthly active users, out of 200m registered users. The first figure is important: WhatsApp always focused on active users as its key metric, while many rivals have hidden behind their ‘registered’ totals. Now it seems they’re all more willing to say how many people are actually using their products.