Open Source Alternatives

Alternatives to Microsoft Teams

Team communication and collaboration platform from Microsoft.

4 building blocks
microsoft.com/teams ↗

Microsoft Teams is a trademark of its respective owner.

Updated Mar 2026

Building Blocks

Microsoft Teams is a platform — it bundles multiple capabilities into one subscription. These tools each cover one piece. Teams often assemble 2–3 of them instead of paying for the full suite.

Zulip

16covers: team messaging55%

Team chat with threading

Rocket.Chat

15covers: team messaging60%

Open source Slack/Teams alternative

Mattermost

14covers: team messaging65%

Open source secure collaboration platform

Synapse

13covers: team messaging40%

Matrix homeserver for decentralized chat

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