Facebook Messenger is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Telegram, which is free. If that doesn't suit you, our users have ranked more than 100 alternatives to Facebook Messenger and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Facebook Messenger are Signal (Free, Open Source), Element (Free Personal, Open Source), Jitsi (Free, Open Source) and Skype (Freemium).
Blitzz is a video powered, enterprise field service platform that quickly becomes the smart, system of record for all collaborative events between field techs, HQ support and end users of physical equipment in the field.