![Facebook Messenger Users - 2014-2020 [CHART]](https://trends.e-strategyblog.com/wp-content/uploads/2016/10/Facebook-Messenger-Users-2014-2020.gif "Facebook Messenger Users")
eMarketer estimated in June that 105.2 million people in the US would use Facebook Messenger at least monthly this year, representing about two in five mobile phone users in the country. WhatsApp has a much smaller US user base, estimated at 18.4 million this year.
In November 2015, eMarketer forecast there would be 1.61 billion mobile messaging app users worldwide this year.
“Messenger is gaining traction among marketers that want to experiment with chat bots,” said Williamson. “These are very early days for conducting business activities on Messenger, however, and it remains unclear just how important it will be as a marketing vehicle”
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