WhatsApp CEO update

430m active users and 18bn messages sent per day, which is pretty close to global SMS volumes (20bn or thereabouts, and maybe lower). All with just 25 engineers. 

"No ads, no games, no gimmicks". Interesting that by far the biggest mobile social app is the least complex, and of course the most focused. No canvas, no platform, no ecosystem, barely any API - and massive growth.