WhatsApp founder Jan Koum leaving Facebook after clashing over privacy and data
Facebook has taken steps to generate revenue from WhatsApp, which unlike Facebook does not have advertising

The co-founder of WhatsApp, a messaging service owned by Facebook with more than 1 billion daily users, said on Monday he is leaving the company. Jan Koum has been one of the strongest advocates for privacy inside Facebook.
It’s been an amazing journey with some of the best people. But it is time for me to move on
Koum clashed with the parent company over WhatApp’s strategy and Facebook’s attempts to use its personal data and weaken its encryption, The Washington Post has reported, citing people familiar with the internal discussions.
“It’s been almost a decade since Brian and I started WhatsApp, and it’s been an amazing journey with some of the best people,” Koum wrote on his Facebook page, referring to co-founder Brian Acton. “But it is time for me to move on.”
Acton left the messaging service company in September to start a foundation after spending eight years with WhatsApp.
Facebook chief executive Mark Zuckerberg commented on Koum’s post, saying he was grateful for what Koum taught him about encryption “and its ability to take power from centralised systems and put it back in people’s hands. Those values will always be at the heart of WhatsApp.”
Facebook has battled European regulators over a plan to use WhatsApp user data, including phone numbers, to develop products and target ads. The plan is suspended, but WhatsApp said last week it still wanted to move forward eventually.
Stanford alumnus Acton and Ukrainian immigrant Koum co-founded WhatsApp in 2009. Facebook bought WhatsApp in 2014 for US$19 billion in cash and stock.