We used Zulip for over a year and then eventually switched to Slack. I still miss Zulip.

The major reasons for us moving were:

* it is not Slack!

* lack of plugins from other applications

* inability to collaborate with external parties - customers, vendors etc

I usually invite externals as guests to my Zulip instance.

Unlimited guests is nice

My stance would probably be:

- I already learned Slack at my last 9 jobs

- I don't feel like blowing up my workflow and learning something new

- unless the value is overwhelmingly clear

if someone tried to switch my company to Zulip or anything else.

"what problem are you trying to solve?"

Having used Zulip, it's one of those things that sound dumb before you use them, but then you wonder how all these savages live without it.

Basically, Zulip is the chat equivalent of a bidet.

It’s a chat app. What is there to learn?