The Secure CommsOS™ for mission-critical operations
Chat and calls on your own server, without the Microsoft 365 integration.
- Language
- TypeScript
- Licence
- Other
- Stars
- 46k
- Latest
- 8.9.0
- Last push
- 2026-10-06
alternatives to
Microsoft Teams
Chat, meetings and calls tied to Microsoft 365. A closed product from Microsoft.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| Rocket.Chat | Partial | 46k | Other | Open core | Yes | TypeScript | 8.9.0 | 2026-10-06 |
| Mattermost | Partial | 39k | Other | Open core | Yes | TypeScript | v11.11.1 | 2026-10-06 |
| Jitsi Meet | Partial | 30k | Apache-2.0 | Open source | Yes | TypeScript | stable/jitsi-meet_11248 | 2026-10-05 |
| Synapse | Partial | 4.7k | AGPL-3.0 | Open source | Yes | Python | v1.162.0 | 2026-10-06 |
| Wire Server | Partial | 2.8k | AGPL-3.0 | Open source | Yes | Haskell | v2026-10-05 | 2026-10-06 |
| Nextcloud Talk | Partial | 2.2k | AGPL-3.0 | Open source | Yes | JavaScript | v25.0.5 | 2026-10-06 |
Every alternative
6 alternatives
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Chat and calls on your own server, without the Microsoft 365 integration.
- Language
- TypeScript
- Licence
- Other
- Stars
- 39k
- Latest
- v11.11.1
- Last push
- 2026-10-06
Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.
Video meetings only.
- Language
- TypeScript
- Licence
- Apache-2.0
- Stars
- 30k
- Latest
- stable/jitsi-meet_11248
- Last push
- 2026-10-05
Synapse: Matrix homeserver written in Python/Twisted + Rust
Chat only, through a Matrix client.
🇪🇺 Wire back-end services
Encrypted chat and calls only.
- Language
- Haskell
- Licence
- AGPL-3.0
- Stars
- 2.8k
- Latest
- v2026-10-05
- Last push
- 2026-10-06
🗨️ Nextcloud Talk – chat, video & audio calls for Nextcloud
Team chat, calls and screen sharing next to Nextcloud files and calendars.
- Language
- JavaScript
- Licence
- AGPL-3.0
- Stars
- 2.2k
- Latest
- v25.0.5
- Last push
- 2026-10-06
Head to head
- Jitsi Meet vs Mattermost
- Jitsi Meet vs Nextcloud Talk
- Jitsi Meet vs Rocket.Chat
- Jitsi Meet vs Synapse
- Jitsi Meet vs Wire Server
- Mattermost vs Nextcloud Talk
- Mattermost vs Rocket.Chat
- Mattermost vs Synapse
- Mattermost vs Wire Server
- Nextcloud Talk vs Rocket.Chat
- Nextcloud Talk vs Synapse
- Nextcloud Talk vs Wire Server
- Rocket.Chat vs Synapse
- Rocket.Chat vs Wire Server
- Synapse vs Wire Server
About Microsoft Teams
- Vendor
- Microsoft