Facebook trying to weaken WhatsApp privacy? Co-founder Jan Koum quits

The co-founder of WhatsApp, a messaging service owned by Facebook Inc with more than 1 billion daily users, said on Monday he was leaving the company, in a loss of one of the strongest advocates for privacy inside Facebook.

Jan Koum's plan to exit comes after clashing with the parent company over WhatApp's strategy and Facebook's attempts to use its personal data and weaken its encryption, the Washington Post earlier 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, WhatsApp's chief executive, said in a post on his Facebook page referring to co-founder Brian Acton.

"But it is time for me to move on." He did not give a date for his departure and could not immediately be reached for comment.

Acton left the messaging service company in September to start a foundation, after spending eight years with WhatsApp.