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Ukrainian WhatsApp founder grew up poor, was rejected by Facebook but now worth billions
WhatsApp founder Jan Koum came from a wealthy background.However, from escaping the USSR to growing up on benefits, the billionaire tech entrepreneur's life is a true rags-to-riches story.Koum, who oversaw the sale of WhatsApp to Mark Zuckerberg's Facebook—a.k.a. Meta—in a multibillion pound deal in 2014 before leaving the company over privacy concerns, came to the US at a young age as an immigrant from the former Soviet Union.Today, he's seemingly retired, spending his time growing a huge and expensive California real estate empire while collecting cars and playing ultimate frisbee.