[elvis635]

Nice, I'll check it out!

Given the premium price of Slack compared to alternatives I'd have expected that they were the one developing a Linux client

[jess1003]

Check out Hall for business messaging. Has a Linux, Mac, Windows, iPhone/iPad, Android, & web apps. All free, with unlimited members, groups, integrations, and history. https://hall.com/download-hall/hall-for-linux

[proksoup]

Hall has a linux client, in addition to their android/ios/mac/windows clients.