Greetings, and thank you for Ripcord, this kind of "old-school" (in a very good way) application is a very much needed fresh breath in today's Electron-based world, and was perfectly worth the license.

My question would be: is there - even a long term - plan to support Mattermost as well? My search in feature reqs did not turn up anything about this.

It's one of the ones I would consider. It depends on its current popularity when the time comes for me to add a third service.

I'm also interested in Mattermost support.