Mattermost
Mattermost Desktop application for Windows, Mac and Linux
Free · Open sourceLatest versionMacWindows
About Mattermost
Mattermost (opens in a new tab) is an open source platform for secure collaboration across the entire software development lifecycle. This repo is for the native desktop application that's built on [Electron](http://electron.atom.io/); it runs on Windows, Mac, and Linux.
Originally created as "electron-mattermost" by Yuya Ochiai.
Features
Desktop integration
- Server dropdown for access to multiple servers
- Dedicated tabs for Channels, Boards and Playbooks
- Desktop Notifications
- Badges for unread channels and mentions
- Deep Linking to open Mattermost links directly in the app
- Runs in the background to reduce the number of open windows
Usage
Custom App Deployments
Our docs provide a guide (opens in a new tab) on how to customize and distribute your own Mattermost Desktop App, including how to distribute the official Windows Desktop App silently to end users, pre-configured with the server URL and other app settings.
Description adapted from the project README.
- Version
- 6.3.1
- Updated
- Oct 15, 2026
- Size
- 113 MB to 216 MB
- License
- Apache License 2.0
Open source details
- Source code
- Exact source for v6.3.1
- Released
- Oct 15, 2026
- GitHub stars
- 2.3K
Community project. Help and bug reports go to the maintainers on GitHub; AppsXi does not provide support for this app.
License
PermissiveApache License 2.0
Use, change and share it freely, including in closed source apps, as long as the copyright notice stays. Includes a patent grant.
Read the full licenseHow this app was checked
AppsXi checks every version before it is listed.
Mac
Signed by Mattermost, Inc. (UQ8HT4Q2XM)
Apple Developer ID team UQ8HT4Q2XM
Notarized by Apple
Hardened Runtime on
File matches the hash GitHub published
SHA-256 5a0c2f202f56ef7d3a1d5a013aafce2f8728af42b08f62c5bd8ab080a94b1ab4
No malware found
ClamAV 1.5.4 on Oct 15, 2026
Install and behavior test in a virtual machine: not run yet
Coming soon for all listings.
Updates itself from the maintainer's own feed
electron-updater (github). AppsXi checks each new version too.
Windows
Signed by Mattermost, Inc.
Certificate from Microsoft ID Verified CS EOC CA 03,O=Microsoft Corporation,C=US
Signature is timestamped
All bundled programs are signed
File matches the hash GitHub published
SHA-256 d771ad11cbf9d1814465f2459a49962651e3ea5e88ed1b0619de08cb94119084
No malware found
ClamAV 1.5.4 on Oct 15, 2026
Install and behavior test in a virtual machine: not run yet
Coming soon for all listings.
Versions
6.3.1checked
Checked Oct 15, 2026 · Mac and Windows
DMG · 216 MB, MSI · 113 MB, MSI · 119 MB
Questions about Mattermost
Is Mattermost free?
Yes. Mattermost is free and open source under the Apache License 2.0. AppsXi lists the maintainers' official release and does not charge for it.
Is Mattermost safe to download?
AppsXi downloads every version of Mattermost from the maintainers' official GitHub release and checks it before it is listed. For version 6.3.1 (checked Oct 15, 2026), the Mac download is signed by its developer and notarized by Apple, the Windows download is Authenticode signed, each file matches the checksum GitHub publishes for the release, byte for byte and a malware scan found nothing.
Does Mattermost run on Apple silicon Macs?
Yes. Mattermost has a native Apple silicon build, and it runs on Intel Macs too.
What does Mattermost need to run?
Mattermost needs macOS Monterey (12) or later.
Who makes Mattermost?
Mattermost is an open source project by Mattermost on GitHub (mattermost/desktop). Help and bug reports go to its maintainers there.
Reviews
No reviews yet. Anyone who downloads it from AppsXi while signed in can review it a day later.
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