29:13Jim Goetz and Jan Koum at Startup School SV 2014
From Y Combinator · Published Jul 23, 2015 · Watch on YouTube
TL;DR
Jan Koum grew up in Ukraine, immigrated to the US at 16, dropped out of San Jose State when David Filo called him into Yahoo, and spent nine years there learning scaling. He and Brian Acton built WhatsApp by focusing obsessively on product, charging for iOS to slow growth, using phone numbers instead of usernames, and staying completely under the radar — no press, no marketing, no meetings.
Key insights
- Growing up in Ukraine without easy long-distance communication (no internet, email, Skype) directly motivated Koum’s desire to build a simple messaging tool.
- The nine years at Yahoo (from 400 to thousands of servers) taught Koum and Acton exactly what to avoid on scaling, hiring, and focus — especially Yahoo’s distraction from advertising and rapid mass hi
- WhatsApp deliberately charged $1 for its iOS app to slow growth, ensuring they could build reliable infrastructure and support existing users before accepting more.
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