Jan Koum is a Ukrainian-American internet inventor and computer programmer. He is the CEO and co-founder of WhatsApp, a mobile messaging application which was acquired by Facebook Inc. in February 2014 for US$19.3 billion.
Brian Acton is an American computer programmer and Internet entrepreneur. He is the co-founder of WhatsApp.
WhatsApp Messenger is a freeware and cross-platform messaging and Voice over IP (VoIP) service. The application allows the sending of text messages and voice calls, as well as video calls, images and other media, documents, and user location. The application runs from a mobile device though it is also accessible from desktop computers; the service uses standard cellular mobile numbers. Originally users could only communicate with other users individually or in groups of individual users, but in September 2017 WhatsApp announced a forthcoming business platform which will enable companies to provide customer service to users at scale.
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