Jan Koum
Updated: Wikipedia source
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 billion. According to Forbes, he has an estimated net worth of US$15 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 billion.