Project Sonoma Alternatives

Slack is an application that helps teams communicate and work together by combining messaging, file sharing, and app integrations in one place. It makes it easy for teams to stay connected and work efficiently, whether they are in the office or working remotely.

I really love using slack! The interface is simple and beautiful, and the operation is very simple. A Good and useful app!

Open source, on-premises, Slack alternative

3. Espresso Chat

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Productive conversations start here

The one-stop app for deskless workers by Microsoft