WhatsApp Messenger, or simply WhatsApp, is an American freeware, cross-platform centralized messaging and voice-over-IP service owned by Facebook, Inc. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other content. Wikipedia
Original author(s): Brian Acton, Jan Koum
Developer(s): WhatsApp LLC (Facebook, Inc.)
Initial release: January 2009; 12 years ago
Written in: Erlang
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