alt Hacker NewsAnd "discord" means "disagreement", "lack of harmony", "arguments" in English. Even weirder name for a chat application in an even more commonly used language.
"Slack" associates pretty strongly with "slack off" (get no work done) too, so that one's also strange.
I think "Zulip" has the best naming of all these.
The only explanation I can offer for “Slack” is that its founders and top brass have been adherents of the “parody religion” Church of the SubGenius, and have successfully interposed themselves into the everyday business machinations of a wide swath of Western businesses.
Meanwhile, “Discord” wouldn’t surprise me if it were a product of the Discordians themselves, a similarly disorganized “parody religion”.