How can I integrate TalkJS with Facebook Messenger, WhatsApp, Telegram, ...?
TalkJS does not have integrations with third party messaging services out of the box. However, with a bit of programming it's possible to make a custom integration.
TalkJS webhooks can notify you when a user writes a message, which you can then forward to a third party service using their API. Similarly, when a user on a third party service writes a message, use our REST API (send message docs) to inject that message into the TalkJS chat. Effectively you'll be mirroring the entire conversation on both TalkJS and the third party service.