After an acquisition, we are transitioning from google meet and slack, to Teams. I used to hate slack so much with their random features popping left and right and menus moving around. Oh I didn't know how good we had it.
Slack is a delight compared to Teams. And I'm not even alone in this, everyone is still using slack until it gets pried off our hands. So help me God anyone mentions Copilot one more time...
Despite their confusion as to whether they want to really support their free and open source versions (without some absurd user count cliff), Mattermost (https://mattermost.com) is quite excellent and IMO is better than Slack. For example, editor leans towards native Markdown so things like syntax highlighting with backticks work as you expect.
Their recent update removed the paywall from SSO (and unfortunately the Gitlab SSO workaround) for social logins up to 100 seats, afterwards there's an absurd per seat cost similar to its non-open source brethren. One day if needed, I plan to drop-in an SSO middleman allowing anyone to leverage their own SSO layer (which will map to the login form with username/password) to avoid the SSO limits altogether. Though good enough for my needs, and likely yours too. Especially if you're open to paying for their seats.
Due to the way Microsoft does sales to enterprises, there’s no incentive for its software to be any good or even compete directly with anyone else… as long as it ticks the right boxes, the people making purchasing decisions are fine with it (it’s bundled in with something critical like Excel anyway).
If the gov really took an expansive view of antitrust, it would break up software bundling and require ala carte pricing per app, defined as a single primary use case.
This will become all the more important as OpenAI/Anthropic start bundling all of their products together and putting existing SaaS out of business for no reason other than to get some crucial model or capability, companies have to buy the whole bundle.