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Microsoft Teams (free) vs Slack: catalog facts
Microsoft Teams (free)	Slack
Freemium Free edition available; Teams Essentials costs $4 per user per month, paid yearly.	Freemium Free plan available, with paid plans for more features.
Windows, macOS, Android, iOS, Web	Windows, macOS, Linux, Android, iOS, Web
Chat, file sharing and meetings in one app Meetings of up to 100 participants on the free tier	Channels keep team conversations organized Large range of app integrations
Requires a Microsoft account Proprietary and tied to Microsoft services	Closed source hosted service Many features and AI tools sit behind paid plans
Downloadable app, Web application	Downloadable app, Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.