There is an emacs Slack client, though I don't know if you'll find it a seamless migration or as polished as what you're used to with IRC: https://www.emacswiki

There is an emacs Slack client, though I don't know if you'll find it a seamless migration or as polished as what you're used to with IRC: https://www.emacswiki.org/emacs/Slack https://www.emacswiki.org/emacs/Slack