>>nico+191
No affiliation and didn't get around to use it yet, but clawdbot[1] does WhatsApp, Telegram, Slack, Discord, Signal, iMessage, Microsoft Teams, and WebChat.
>>ramoz+Hn1
I wrote an mcp for claude code to talk to you (and receive messages back) over slack, though it has the caveat of being unable to initiate a session. It was pretty easy to do with claude but probably not the best approach.