# Mattermost (open-source messaging app)

> Mattermost is a free, open-source messaging app for Android. Secure, self-hosted workplace messaging. It has 2,730 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid.

Requires Mattermost Server v11.7.0+. Older servers may not be able to connect or have unexpected behavior. ------- Mattermost is secure workplace messaging from behind your firewall. - Discuss topics in private groups, one-to-one or team-wide - Easily share and view image files - Connect in-house systems with webhooks and Slack-compatible integrations To use this app, you need a URL for a Mattermost server. ------- Host your own server: Terms of Service: Contribute to the project:

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/mattermost/mattermost-mobile |
| Platforms | Android |
| Built with | Other |
| GitHub stars | 2,730 |
| License | Apache-2.0 (open source) |
| F-Droid | https://f-droid.org/packages/com.mattermost.rnbeta/ (package com.mattermost.rnbeta) |
| F-Droid anti-features | none flagged |
| Google Play | not linked |
| App Store | not linked |
| Website | https://about.mattermost.com/ |
| Official | yes (published by the organization behind the product) |
| Category | Messaging & chat |
| Latest release | release-2.44 (Sep 16, 2026) |
| Last commit | Oct 7, 2026 |

F-Droid builds its apps from source and flags anti-features: https://f-droid.org/en/docs/Anti-Features/

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