Element Matrix Services lets you pick up the Slack between Teams... Element Matrix Services now offers fully managed bridges for both Microsoft Teams and Slack, so Element (or any other Matrix-based app) can integrate with either service. Connect Element to both, and you can integrate Slack and Microsoft Teams via Matrix.

When communicating in groups, collaborating at work, or talking in online communities it's common to want to talk about a range of topics with the same set of people. We want to improve Element to make it easier to do that. Most people either painstakingly create multiple rooms and send invites to each one individually, or they brave our old and unloved Communities feature and hit its many limitations.