Jan Koum
Ukrainian-born American entrepreneur, co-founder of WhatsApp
- Fame56.0
- Momentum0.0
- Developers rank#70
Source-basedFalling
- Fame56.0
- Momentum0.0
- Developers rank#70
- Wikipedia30.4K
Born 1976 · age 50United States
United States
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Summary
Updated 2026-06-17
Jan Borysovych Koum is an American billionaire businessman and computer programmer. He is the co-founder and former CEO of WhatsApp, a mobile messaging app which was acquired by Facebook in 2014 for US$19.3 billion. According to Forbes, he has an estimated net worth of US$15.2 billion as of October 2023, making him one of the richest people in the world. Koum was ranked 44th on the Forbes' list of richest Americans in 2023 with a net worth of $15.1 billion.
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$17.2Bestimated · 2026
▲ 7%vs 2024
Forbes* estimated (interpolated between sourced years)
Figures are rough estimates and may be inaccurate. Not financial advice.
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The six component signals behind the Fame score, and their ranks across the leaderboards.
Fame
Falling56.0
Composite of search demand, mentions, audience & graph footprint.
Score components
Historical21.4
Now attention7.0
Source confidence75.0
Completeness85.0
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