WHATSAPP

WhatsApp is an instant messenger for smartphones. It was created by company founders Brian Acton and Jan Koum. The latter was born in 1976 in Kyiv , Ukraine . In October 2014, the mobile messenger WhatsApp was acquired by Facebook for 19 billion dollars. Subsequently, Jan was appointed the executive director of Facebook, Inc. This deal was a record in the start‑up industry. The previous record‑holder, Instagram, sold for only 1 billion dollars. In April 2015, the audience of active users of WhatsApp reached 800 million