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Facebook Messenger, Whatsapp and Weechat use XMPP. I wouldn't say it is dead.

• legulere 11y ago
  Facebook Messenger deprecated XMPP support: https://developers.facebook.com/docs/chat https://developers.facebook.com/docs/chat Whatsapp is built using XMPP, but only as a basis. They don't want you to use it with anything but their official clients. I don't know enough about wechat. All of them never had federation support
  • DominikR 11y ago
    They deprecated the API for 3rd party developers. That doesn't mean they don't use it anymore. Facebook frequently deprecates APIs without providing any kind of replacement when they feel that 3rd parties abuse the APIs too much for advertisements.
    • auscompgeek 11y ago
      The Facebook Chat XMPP gateway was shut down long ago. Facebook Messenger uses the MQTT protocol, rather than XMPP.