Slack just did the same to us for our company Slack. We have to have the HIPAA compliant Enterprise version, price going up 40% next year. Looks like we'll migrate, especially because compliance has a bunch of annoying caveats.
We're in the same boat; HIPAA compliant Enterprise license. Slack came to us with a 2 day notice; pay more now or pay a lot more later. We asked if we could reduce the number of users and they said no, if you change anything then you have to take the new pricing for double the current price.
The whole thing was super sleazy. We told them that we were moving to MS Teams (arrrgghhh!) and they said "Bye!".
