Just a heads up, at least several of those are supported to varying degrees. Looks like WhatsApp is supported through its web API, and slack and telegram's protocols are supported. Facebook messenger is no go, though.
Re:Pidgin – A Universal Chat Client
by im_the_internet on Saturday January 23, 2021 @08:25AM
(#25882027)
I'm currently using Pidgin for Facebook Messenger with https://github.com/dequis/purple-facebook/
But facebook messenger at least used to work, I know I used it with pidgin before
Re:Pidgin – A Universal Chat Client
by paulryanrogers on Friday January 22, 2021 @11:32PM
(#25879681)
Facebook used to support XMPP. Which predates their separate Messanger app.
There's modern facebook support with https://github.com/dequis/purple-facebook/
But what do I use it for? Nowadays I talk to people on Facebook, Whatsapp, Instagram, Slack and Telegram and none of them can be used on Pidgin.
Not Pidgin's fault I know. Just companies trying to lock people in.