BKAV, known in Vietnam as the leading Internet security firm, has officially joined the OTT market with its launch of Btalk, an app that allows users to make calls and send messages free of charge. The quality of Btalk is still uncertain. However, Nguyen Tu Hoang, Vice President of BKAV, said Btalk’s mission is to replace Viber, a very popular app among Vietnamese at present. Hoang hopes to make Btalk succeed in Vietnam, and then reach out to the world. Viber reportedly has 10 million users in Vietnam.