"For example, Zoom Video Communications Inc. founder Eric Yuan started the business at 41 after leaving a senior position at Cisco Systems Inc. WhatsApp co-founder Jan Koum came up with his messaging app at 32 after spending a decade as an engineer at Yahoo."
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"Noom is backed by investors including Sequoia Capital, Kleiner Perkins, RRE Ventures, Qualcomm Ventures, WhatsApp co-founder Jan Koum and tennis star Serena Williams. "
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"WhatsApp, founded by Jan Koum and Brian Acton, started as an ad-free, secure messaging service, helping it win users across the globe. "
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"WhatsApp's founders, Jan Koum and Brian Acton, launched it in 2009 as a free alternative to SMS text messages. "
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