Jan Koum

Follow to get push alerts on new activity

2026-06-23

What happened to Jan Koum today?

No new stories today yet — we check every few minutes.

Browse by day

Today
06-23
—
Yesterday
06-22
—
6/21
Sun
—
6/20
Sat
—
6/19
Fri
—
6/18
Thu
—
6/17
Wed
—
6/16
Tue
—
6/15
Mon
—
6/14
Sun
—
6/13
Sat
—
6/12
Fri
—
6/11
Thu
—
6/10
Wed
—

By week:This week Last week W24 W23

By month:This month Last month 2026-04

By year:This year 2025 2024

Who is this?

Jan Borysovych Koum (born February 24, 1976) 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.