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Privacy concerns caused WhatsApp founders to leave Facebook

Mark Zuckerberg wearing a blue shirt before a blue background bites his lips frowning.
Photo: Christophe Morin/IP3/Getty Images

The departures of Brian Acton and Jan Koum, the creators of WhatsApp, from Facebook followed disagreements over how to squeeze more revenue out of the messaging platform using user data — costing them about $1.3 billion, the WSJ's Kirsten Grind and Deepa Seetharaman scoop.

Why it matters: The disagreement stems from WhatsApp's hesitance to monetize using targeted ads — Acton and Koum have notably advocated for user privacy — as Facebook attempts to leverage the service's vast user base to justify its $22 billion acquisition in 2014.