[Fnoord]

Ripcord instead of Discord and Slack.

[anthk]

Or a bitlbee gateway + IRSSI.

[stjohnswarts]

Yeah if all text works for you doing a bridge through IRC is the way to go. I think weechat also has some add on for discord, slack, and element

[Fnoord]

Any of these is suffice but I thought it was nice adding a mention of a lightweight Qt application.