Mattermost vs Microsoft Teams (2026 standalone client): is it a good Linux alternative?

Mattermost as a Linux alternative to Microsoft Teams (2026 standalone client)

Updated October 29, 2026

Our verdict

Mattermost is a solid replacement for Microsoft Teams (2026 standalone client) if you prioritize security, self-hosting, and developer workflows over out-of-the-box video calling. It excels in messaging, file sharing, and integrations, especially in tech teams. However, built-in audio/video conferencing is limited without plugins or federation via Mattermost Plugin for WebRTC. If your team can compromise on integrated calling or supplement it externally, Mattermost offers strong privacy and customization. It's ideal for organizations that value control and extensibility over convenience.

Feature parity75%

License: Apache-2.0
Price: Free
Latest version: 6.3.1 (October 15, 2026)
Rating: —

Install Mattermost Website ↗

What works the same

Persistent group and direct messaging with channel-based organization
File sharing and collaboration within teams
Cross-platform desktop clients including Linux
Integration with calendars and contacts via plugins or external tools
Support for large team workspaces and role-based access

What is different

Mattermost lacks built-in, reliable video conferencing; requires third-party integration
No native PSTN calling or Outlook calendar sync out of the box
Self-hosting is central to Mattermost, unlike Teams' cloud-first model
User interface is more utilitarian, less polished than Teams
Fewer pre-integrated enterprise identity providers without configuration

Opening your Microsoft Teams (2026 standalone client) files

Mattermost supports general file types (PDF, images, documents) and allows uploading and sharing similar to Teams. However, direct compatibility with Microsoft Teams-specific export formats or archived chats is not supported. You can't open .teams files or export data from Teams into Mattermost automatically. File migration must be manual or scripted. Exporting Mattermost data is possible via APIs or database dumps, but formatting differs significantly.

Switching from Microsoft Teams (2026 standalone client) to Mattermost, step by step

Install the Mattermost server on a Linux host using PostgreSQL or MySQL
Set up teams, channels, and import users from your directory or LDAP
Install desktop and mobile clients across the organization
Migrate files manually or via script from Teams exports
Configure plugins for SSO, calendars, and WebRTC video if needed
Train users on channel structure and permissions model

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 (Flathub)flatpak install flathub com.mattermost.Desktop

Arch / Manjarosudo pacman -S mattermost

Frequently asked questions

Can Mattermost do video meetings like Microsoft Teams?

Not natively. You need to integrate WebRTC via plugin or use external tools like Zoom or Jitsi. The experience is not as seamless as Teams.

Is Mattermost free like the Teams desktop client?

Yes, the open-source edition is free under Apache-2.0. Paid editions add features, but the core platform is free to use and modify.

Can I use Mattermost without self-hosting?

Yes, Mattermost offers cloud-hosted options, but self-hosting is its primary deployment model for full data control.

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Is it a good replacement for Microsoft Teams (2026 standalone client)? 6