Jan Koum Quotes
Be simple and reliable
Citations
Koum, Jan. "Facebook." WhatsApp Blog, WhatsApp, 19 Feb. 2014.
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Jan Koum is a Ukrainian American billionaire businessman and computer programmer. He is the co-founder and was the CEO of WhatsApp, a mobile messaging application which was acquired by Facebook Inc. in February 2014 for US$19.3 billion.