Today, behind the WhatsApp you open every day lies the story of an immigrant who spent his childhood in a house without even running water. Jan Koum grew up under the Soviet regime, fearful of state wiretapping; he would one day found the world's most used messaging app and sell it to the company that rejected him for $19 billion.
Born in 1976 near Kiev to a Jewish family, his home was modest — no hot water, privacy was a luxury. In 1992, at age 16, he immigrated to the United States with his mother and grandmother, settling in Mountain View, California. His father planned to join them but never did. The early years were hard: his mother worked as a cleaner, and the family relied on state aid and food stamp lines.
From rejected application to global giant
Koum taught himself computer networks using second-hand manuals he borrowed. While working as a security test specialist at Ernst & Young, he moved to Yahoo, where he met Brian Acton, his future partner. After working together for nine years, both resigned and traveled South America for a year. Both applied for jobs at Facebook — and both were rejected.
In 2009, Koum bought an iPhone and saw that the App Store would create a brand-new industry. On his birthday, he founded WhatsApp Inc. The app initially gained little traction, but with Apple's push notification feature, it spread rapidly. It offered an ad-free, simple messaging experience that respected privacy — principles that would be central to everything later.
Milestones
- Born near Kiev in 1976 in a house without water.
- Immigrated to the US at 16 with his mother; they lived on food stamps.
- Taught himself programming; worked at Yahoo.
- His job application to Facebook was rejected.
- Founded WhatsApp in 2009; kept it ad-free and simple.
- In 2014, Facebook acquired WhatsApp for about $19 billion.
The giant deal signed at the door of the social welfare office
In 2014, Facebook acquired WhatsApp for about $19 billion, one of the largest acquisitions in internet history. Koum chose a symbolic place to sign the deal: the door of the social welfare office where he had once waited in line with his mother for food aid. At the place where he once queued for help, he became a billionaire.
"I do one thing, and I do it well." Koum's words were also the secret to WhatsApp's simplicity.
In 2018, Koum left WhatsApp and the Facebook board due to disagreements over advertising and data privacy, refusing to compromise the principles of the app he founded. Today his fortune is around $16.8 billion, and WhatsApp connects more than 3 billion people across over 180 countries.
