

" WhatsApp Co-Founder Jan Koum is Leaving Facebook and it Could Cost Him $1 Billion." " Exclusive: The Rags-To-Riches Tale Of How Jan Koum Built WhatsApp Into Facebook's New $19 Billion Baby." At the peak under this model, it had about 700 million users worldwide yearly revenue could thus be estimated at $700 million per year at that time.įorbes. In some countries, the app used to cost about $1 to download in others, the first year is free, but each subsequent year costs $1 in other words, WhatsApp had a subscription model. The short answer used to be $1 at a time.

