Zalo is a Vietnamese instant messaging multi-platform service developed by VNG Corporation. The name for Zalo is a blend of Zing (an online website managed by VNG) and alo (a standard phrase used to answer a call in Vietnam) Zalo was co-created by Vuong Quang Kh?i, the executive Vice President of VNG. In December 2012, the official version for Zalo was released to the public As of late September 2024, Zalo has approximately 77.6 million active monthly users with nearly 1.97 billion messages sent each day