[briandear]

But who runs a chat with 5000+ users? The signal to noise would be insane. If each user posted 1 message per hour, that's 5000 messages per hour. For a group that size it seems like Twitter makes more sense. I can't imagine 5000 people needing real time communication. Kind of the mother of all edge cases for a team chat service.

[detaro]

I don't think they are talking about 5000 users chatting in one chat room, but about 5000+ users having a common place to talk to others in small groups and maybe read announcements in a main channel.

My university uses Slack, and the "main" rooms see a few posts a day, but there are tons of small groupchats and DMs.

[pcr0]

It's usually 50-200 users online at a time, and out of that maybe 20-50 are chatting at least once a minute, so no, not 9000 users actively chatting at once.

[Cthulhu_]

There's plenty of IRC servers (which is probably the closest analogue to Slack) with more than 5000+ users. Sure, most of them have a #general channel, but nobody will see that one as the main channel; most will go to a more topical / relevant channel. That's how IRC works, that's how Slack should work.