Mattermost for Linux

Mattermost, Inc. · Open source

Mattermost is an open-source messaging and collaboration platform that teams can run on their own servers. This desktop and mobile app connects to a Mattermost server and gives you channels, direct messages and file sharing.

Open official page for Linux

flathub.org · Official website

✓ Community package (Flathub)
✓ Last checked: Nov. 4, 2026

Version: 6.3.2
Release date: Nov. 2, 2026
License: Apache-2.0
Installer type: flatpak

Install from the command line

How do I use this?

Open a terminal, paste the command and press Enter. Flatpak and Flathub must be set up; Linux Mint has them by default, for other distributions see flathub.org/setup.

flatpak install flathub com.mattermost.Desktop

How to install

Open the Flathub page with the button on this page.
Or run the flatpak command shown on the page in a terminal.
Open the app and enter the server address.

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