We've actually just switched to MS Teams. It's OK. Does the job. But, to be honest, I'm no great fan of instant messaging so I'm always going to react a bit like that to it.
Main difference is cost. If you're already paying for Office 365 then paying for Slack Enterprise (or Plus, or whatever it's called these days) across a fast growing organisation of 170 people on top starts to look really hard to justify versus Teams. You can, of course, stick with the free version but this caused two problems for us:
- We ran out of integrations,
- We found losing message history more than a few days old was really starting to hurt us - you couldn't even go back and refer to a conversation you'd had last week.
Teams isn't perfect: it's purple theme is pretty gross (actually it has a couple of other themes, but they're both foul as well), it can be very slow/laggy, and it has a plethora of UX annoyances (like having poorly designed chat window layout and formatting that wastes loads of space) but we saved £20k/annum by switching over to it. And we now have conversation history and unlimited integrations.
Plus, I have to say, I do not approve of this move by Slack. They could have approached it much more positively by partnering with the author (as an example).
