Mattermost

4.9

18.4K reviews

1M+

Downloads

PEGI 3

About this app

Requires Mattermost Server v10.11.0+. Older servers may not be able to connect or have unexpected behavior.

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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.

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Host your own server: https://about.mattermost.com/download

Terms of Service: http://about.mattermost.com/terms/

Contribute to the project: https://github.com/mattermost/mattermost-mobile

Updated on

Jan 16, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.

No data shared with third parties

Learn more about how developers declare sharing

This app may collect these data types

Personal info, Messages and 3 others

Data is encrypted in transit

Data can’t be deleted

Ratings and reviews

4.9

17.9K reviews

Alex Denisov

December 24, 2025

Great work! Please add read receipts and send voice messages. PS Impossible to use after update to version 2.0. Have all last updates for my server and my Android app. Problems: Sometimes I don't see all messages in threads Sometimes I don't see messages I've just sent Search doesn't work properly - "alex" search prompt doesn't show any results, but "Alex" does Mobile version shows that I have unread messages in some channels while all messages are read and on desktop there is no such issue

9 people found this review helpful

Mattermost

January 5, 2026

Thank you for the feedback, would you be able to help share reproduction steps and your Mattermost server version? Feel free to open a new issue with details at https://github.com/mattermost/mattermost-mobile/issues.

Ouen Novero

December 4, 2025

Mattermost is definitely usable but there were times of being unreachable without unnotice. Sometimes no notification or the application can't able to use due to unknown error. Hopefully, they can able to manage this app because this is our one way to communicate within or acrosss department and schedule.

Mattermost

December 8, 2025

Amanda Brad

November 21, 2025

This app sucks so bad. I wish my work would use anything else. I have to uninstall and reinstall at least once a month because chats won't load or if they do im told they're "read only" and it crashes all the time. I hate im forced to use this app.

3 people found this review helpful

Mattermost

November 21, 2025

What’s new

Requires Mattermost server v10.11.0+ to avoid incompatibilities and crashes. Requires Android 7.0 or higher.

- Added support for servers with passwordless authentication with Magic Link for guest users (requires Enterprise license).
- Added a new Burn-on-Read message feature (requires Enterprise Advanced license).
- Added AI agent streaming support with real-time message updates, reasoning summaries, tool call approval UI, and generation controls.
- Added various bug fixes.

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