WhatsApp Inc. was founded in 2009 by American Brian Acton and Ukrainian Jan Koum (also the CEO), both former employees of Yahoo! Whatsapp sold for $16 billion to Facebook 19th of Feb 2014. Why did Facebook buy whatsapp? WhatsApp has more than 450 million active users, and reached that number faster than any other company in history. It was just nine months ago that WhatsApp announced 200 million...