I’ve never touched a scaling issue with Zulip, how many devices are we talking about here? Maybe I’ve just never touched the walls of scaling it. The architecture seems fine to scale if you self host though.
The only issues I’ve found with Zulip is how it looks and training people to use it right. I’ve had a lot of comments that Zulip has ruined people because they realised how good it is only after they stopped using it, and can tell that everything is so much worse, but the whole time they used it- they hated it.
The other issue, if we can call it as such, is that there’s not that many native third party integrations, we had to write our own bots for some pretty basic things. But writing bots is so much easier in Zulip than Slack (and for Teams its a lesson in genuine masochism) so I give them a pass.
The only issues I’ve found with Zulip is how it looks and training people to use it right. I’ve had a lot of comments that Zulip has ruined people because they realised how good it is only after they stopped using it, and can tell that everything is so much worse, but the whole time they used it- they hated it.
The other issue, if we can call it as such, is that there’s not that many native third party integrations, we had to write our own bots for some pretty basic things. But writing bots is so much easier in Zulip than Slack (and for Teams its a lesson in genuine masochism) so I give them a pass.