https://wccftech.com/whatsapp-now-has-more-than-2-billion-active-users-touts-strong-encryption/

In a significant milestone, Facebook-owned WhatsApp revealed in a blog post that it now has more than 2 billion users.

WhatsApp has been around for a long time and the fact that it's a cross-platform messaging service available on iOS, Android and even on KaiOS, you can expect it to have a lot of users worldwide. WhatsApp is not shying away from admitting that fact, and in an official blog post it has revealed that the service now has more than 2 billion active users. Yes, more than 2 billion.