But he may also have been embroiled in a rift with Facebook management over the parent company's voracious appetite for personal information and WhatsApp's dedication to user privacy, according to the Post report. Besides, Koum is also stepping down as Facebook's board of directors, which comes as surprise. Koum co-founded WhatsApp with Brian Acton, who left Facebook in 2017.
"It is time for me to move on". Koum added he was blessed to have worked "with such an incredibly small team and see how a insane amount of focus can produce an app used by so many people all over the world".
WhatsApp is free to users and has long eschewed advertising-the main source of Facebook's business-leaving it with little or no revenue.
Koum later publically announced his quitting of WhatsApp on Facebook but didn't allude to any debates over privacy or disputes with Mark Zuckerberg's team.
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"I will miss working so closely with you", Zuckerberg wrote. In a WhatsApp blog post in 2012, they wrote that "no one wakes up excited to see more advertising; no one goes to sleep thinking about the ads they'll see tomorrow".
WhatsApp founder and Chief Executive Officer Jan Koum is leaving Facebook Inc., just a few years after his messaging app was acquired by the social-media giant for $22 billion.
When reached for comment, Facebook representatives pointed us to Koum's post.
Zuckerberg and other Facebook executives have spent weeks dealing with the fallout from a personal data scandal involving political consultancy Cambridge Analytica.
It also runs no ads, while Facebook's enormous profits are powered nearly entirely by advertising targeted to its users' interests.
Koum's departure follows other reports of high-level internal disagreement at Facebook. "And you can still count on absolutely no ads interrupting your communication". "WhatsApp will remain autonomous and operate independently". To recall, Acton had left Facebook past year. WhatsApp uses encryption technology that makes messages indecipherable to everyone but the sender and recipient.