Brian Acton is an American computer programmer and Internet entrepreneur. He is the co-founder (with Jan Koum) of WhatsApp, a mobile messaging application which was acquired by Facebook Inc. in February 2014 for US$19 billion. He was formerly employed at Yahoo Inc. In September 2017, Acton announced that he was leaving WhatsApp to start a foundation. On February 21, 2018, Acton and Moxie Marlinspike announced the formation of the Signal Foundation.
