WhatsApp usage in the United States With over 1.5 billion monthly active users, WhatsApp is the most popular mobile messenger app worldwide. As of 2019, the chat app had an estimated 68 million users in the United States, with forecasts projecting an audience size of almost 86 million users in 2023. Despite a sizable app audience, WhatsApp still lags behind competitors Facebook Messenger and Snapchat in terms of U.S. mobile reach and brand awareness. However, according to recent industry data, user engagement with WhatsApp grew 44 percent year-over-year, putting it ahead of other social networks including Facebook, Instagram and Twitter.
WhatsApp and Facebook In February 2014, WhatsApp was acquired by Facebook for a then unheard-of figure for such a purchase – 19 billion U.S. dollars. The mobile messenger is one of Facebook’s four billion-user properties, along with the core Facebook platform, Facebook Messenger and Instagram. During the first quarter of 2019, Facebook stated that 2.7 billion people were using at least one of the company's core products (Facebook, WhatsApp, Instagram or Messenger) each month.