Mattermost 4+

Mattermost, Inc.

    • 4.7 • 3.4K Ratings
    • Free



Requires Mattermost Server v8.1.0+. Older servers may not be able to connect or have unexpected behavior.


Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.

- Keep all of your team communications in one place.
- Orchestrate work across your tools and teams.
- Plan projects and hit milestones.
- Unite your entire technology stack through a single point of collaboration.
- Meet the strictest security, privacy, and compliance requirements.

To use this app, you need a URL for a Mattermost server.


Deploy your own server:

Terms of Service:

Contribute to the project:

What’s New

Version v2.15.0

iPhone 5s devices and later with iOS 12.4+ is required. Server version v8.1.0 or later is required.

- Bumped iOS SDK to v17.2.
- Added back the ability to connect the iOS app to servers without SSL.
- Fixed an issue where opening a user avatar could cause a crash.

Ratings and Reviews

4.7 out of 5
3.4K Ratings

3.4K Ratings

SyavasyaV ,

All looks great.. except

My team and org has been using mattermost for a little over 10 months now and its way better than some other chat services we tried.. (its better than teams, adium and almost as good as slack)… I give a 4 because it isnt perfect…

There are a lot of times when I get a notification on my desktop app but im not notified on the phone… and some times i send a message to someone on my desktop and it shows as a pending notification on my phone and it only goes away after i read the message i sent which isnt a great user experience

Developer Response ,

Hi there, would you be open to creating a new Github issue with details at What OS version and Mattermost server version are you on?

Anon.111 ,

Buggy as can be.

Look, I decided to implement this instead of Slack for my company because I can host on prem and have total control over the functionality. It also ties in nicely with Jira and other well known webhooks: Cloudwatch, Jira etc. But my god, is this the buggiest software/app. Notifications sometimes send (we’re on the enterprise version) - the notification server works when it wants to. If you’re on your phone while a Mattermost notification comes through, you won’t see the pop up. If you’re lucky you’ll see a badge number, but that’s rare. If you do get a badge number, it won’t go away until you log out which is a pain especially if you’re using 2FA. It’s odd, because Mattermost is supposed to be Enterprise level, and their interface is so nice and nice to use, but for whatever reason they can’t seem to iron out all their bugs. How hard is it to fix a badge icon? Or actually push notifications? What’s funny is that on this latest release it says badge icon issue fixed - I updated - and the issue is still there. Ughh. What can you do? Fix your bugs Mattermost!

Developer Response ,

Hi there, can you attempt to upgrade to our latest release and try again? We've addressed some issues around badges and notifications. Please contact our support team if your issue persists at

ntwrkguru ,

Bugs, lagging feature parity, and poor support

Unfortunately, I’m forced to use this service for my job but it’s definitely not Slack. First, there are a lot of bugs with the server, the Mac client, and the iOS app. Specifically to the iOS app, there are “stuck” notifications on the app icon. Secondly, support is pretty much non-existent unless you want to go through a hassle of opening a GiuHub issue and hoping someone looks at it. Open-source should not equal poor support. Lastly, the feature parity is just not there.

This app works, apart from the notification bug, so I’ll give it 3 stars. But the overall service and apps combined is pretty awful. I can’t believe people would pay for an “Enterprise” license given its issues.

[update] Took a YEAR for the developers to respond to this, and then it’s a “try our new version”. In that time, we moved to Slack and now to Teams. Sorry, but that’s just too slow. I mean, it does work, but I would never choose it for wide scale Enterprise use.

Developer Response ,

Hi there, appreciate your feedback. Can you attempt to upgrade to our latest release and try again? Our support team is really helpful and always available at if your issues persist

App Privacy

The developer, Mattermost, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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