MattermostLinux
vs
Microsoft Teams (legacy)Windows
Mattermost as a Linux alternative to Microsoft Teams (legacy)
Updated
Our verdict
Mattermost can replace Microsoft Teams (legacy) for teams that need a self‑hosted, open‑source solution. It covers core chat, channel organization, file sharing (with version history), and basic audio/video calls, and works on Linux, Windows, macOS, Android, and iOS. Teams that rely heavily on Microsoft‑specific integrations (Outlook calendar, SharePoint, Teams bots) will find gaps, but developers and small‑to‑medium businesses that prefer control and extensibility will benefit.
- License
- Apache-2.0
- Price
- Free
- Latest version
- 6.3.1 (October 15, 2026)
- Rating
- —
What works the same
- Persistent text channels organized by topic
- Real‑time chat with typing indicators
- File sharing with version history
- Cross‑platform clients (Linux, Windows, macOS, mobile)
- API‑first design for automation
What is different
- No native integration with Microsoft Outlook calendar or contact lists
- Video conferencing quality and features are less mature than Teams
- No built‑in meeting scheduling or meeting lobby
- No native support for Office document co‑editing
- Limited third‑party bot ecosystem compared to Teams
Opening your Microsoft Teams (legacy) files
Mattermost stores files in a database or filesystem; it does not natively import Teams .msg or .docx attachments. Exporting Teams files to a shared folder and uploading them into Mattermost is the usual workaround. Direct conversion of Teams chat history to Mattermost format is not supported.
Switching from Microsoft Teams (legacy) to Mattermost, step by step
- Export Teams chat history to CSV or JSON using the Microsoft Graph API.
- Export Teams files to a shared folder or OneDrive and download them locally.
- Set up a Mattermost server (self‑hosted or cloud) and create the same channel structure.
- Upload exported files into the corresponding Mattermost channels and use the versioning feature to keep history.
- Import chat history by using Mattermost’s import API or a community tool, mapping user IDs appropriately.
- Verify permissions and test audio/video calls before decommissioning Teams.
- faq
Key features of Mattermost
- Self-hosted server option for full data control
- Deep integration with CI/CD and code repositories
- Support for MySQL and PostgreSQL databases
- Plugin system for extending functionality
- Channel-based organization for project topics
- API-first design for custom automation
How to install Mattermost on Linux
flatpak install flathub com.mattermost.Desktopsudo pacman -S mattermost5 other alternatives to Microsoft Teams (legacy)
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