AntimatterCompare
Antimatter vs Microsoft Teams
Microsoft Teams comes with Microsoft 365. It is deeply tied to Microsoft's cloud and licensing.
Why teams choose Antimatter
- Self-hosted and open source, with no dependency on a single vendor's cloud.
- A fast chat-first interface with voice channels, threads and built-in apps.
- AI, transcription and translation with the models you choose, with no add-on license.
When Microsoft Teams may suit you better
- Your organisation lives in Microsoft 365, SharePoint and Outlook already.
- You need large meetings, webinars and telephony from one vendor.
Feature by feature
| Feature | Antimatter | Microsoft Teams |
|---|---|---|
| Hosting and licensing | ||
| Self-hosted on your own servers | ✓ Yes | ✕ No |
| Open-source server | ✓ YesAGPL v3 | ✕ No |
| Every feature without a paid plan | ✓ Yes | ✕ No |
| Runs offline, without internet access | ✓ Yes | ✕ No |
| Messaging | ||
| Channels, direct messages and threads | ✓ Yes | ✓ Yes |
| Unlimited message history | ✓ Yes | ✓ Yes |
| Scheduled messages and reminders | ✓ Yes | ✓ Yes |
| Message priority and acknowledgements | ✓ Yes | ◐ Partlyurgent messages, no acknowledgements |
| Self-destructing (burn-on-read) messages | ✓ Yes | ✕ No |
| Automatic translation of channels | ✓ Yesself-hosted models | ✓ Yes |
| Calls | ||
| Voice and video calls with screen sharing | ✓ Yes | ✓ Yes |
| Always-open voice channels | ✓ Yes | ✕ No |
| Live captions and call transcripts | ✓ Yesyour own speech-to-text | ◐ Partlydepends on the license |
| Apps and AI | ||
| Collaborative notes and documents | ✓ Yes | ✓ YesLoop |
| Whiteboards | ✓ Yes | ✓ Yes |
| Kanban boards | ✓ Yes | ◐ PartlyPlanner |
| Incident and process checklists | ✓ Yes | ◐ Partlythrough Power Automate |
| Polls | ✓ Yes | ✓ Yes |
| AI assistants with the models you choose, self-hosted included | ✓ Yes | ◐ PartlyCopilot, paid add-on |
| Security and administration | ||
| Single sign-on (SAML, OpenID Connect) | ✓ Yes | ✓ YesMicrosoft Entra |
| LDAP and Active Directory sync | ✓ Yes | ✓ YesMicrosoft Entra |
| Data retention and compliance export | ✓ Yes | ◐ Partlydepends on the license |
| Federation with other servers | ✓ Yesshared channels | ◐ Partlyexternal access |
| End-to-end encryption of messages | ✕ No | ◐ Partlyone-to-one calls |
"Partly" means the feature needs a paid plan, an add-on or a plugin, or exists in a limited form; the note says which. Based on each product's public documentation as of October 2026: plans and features change, so check the vendor's own site before deciding. Spotted a mistake? Tell us.