# Rocket.Chat vs Mattermost

The clearest difference is rating: Mattermost at 4.8 against Rocket.Chat's 4.4. Mattermost also leads on update cadence (every 8 days vs every 3 weeks). Rocket.Chat's advantage is review sentiment (62% vs 38%) and device support (4 vs 2). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mattermost holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 3.7K and 5.6K respectively. Written reviews complicate that: 62% of Rocket.Chat's written reviews are positive against 38% of Mattermost's, so the app with the better star average is not the one people write more warmly about.

Rocket.Chat ships an update every 3 weeks, Mattermost every 8 days. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Rocket.Chat | Mattermost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (3.7K ratings)](https://appshunter.io/ios/app/rocketchat/id1148741252/reviews) | **[4.8 (5.6K ratings)](https://appshunter.io/ios/app/mattermost/id1257222717/reviews)** |
| Number of ratings | 3.7K | **5.6K** |
| Positive reviews | **61.7% of reviews** | 37.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | Free |
| Size | 78 MB | 93 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Rocket.Chat Technologies Corp.](https://appshunter.io/developer/1148477217) | [Mattermost, Inc.](https://appshunter.io/developer/654282837) |

## What reviewers say

### Rocket.Chat

[App page](https://appshunter.io/ios/app/rocketchat/id1148741252)

A secure communication platform that integrates messaging, voice, video, and AI for organizations requiring high security and compliance. It offers features like E2E encryption and two-factor authentication to protect sensitive communications.

**Highlights:** Unified messaging, voice, and video, End-to-end encryption, Two-factor authentication, Open source software, On-premises or cloud hosting, Guest access, File sharing

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Robust and reliable
- 🔒 Secure self-hosted chat
- 👍 Intuitive and easy to use
- 🙌 Great for team communication
- 💻 Seamless desktop and mobile experience

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔍 Inconsistent search and navigation
- 📢 Unreliable notification system
- 🔒 Tricky privacy management
- 🔄 Frequent login issues

**Reported bugs**

- Messages not loading properly
- Inability to stay logged in
- Broken translation feature
- Compatibility issues with newer devices
- Admin panel not functioning on mobile

**Requested features**

- Improved notification settings
- Enhanced file sharing and management
- Customizable notification sounds
- Streamlined admin panel for mobile
- Integrated video/audio calling


### Mattermost

[App page](https://appshunter.io/ios/app/mattermost/id1257222717)

This platform enables secure messaging, file sharing, and workflow automation for critical industries. It offers voice calls, project management, and enterprise mobility management for enhanced collaboration and data control.

**Highlights:** Secure messaging, file, and link sharing, 1:1 and group voice calls, Workflow automation with Playbook, Enterprise Mobility Management support, Private mobility with ID-only push notifications

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and responsive
- 🔒 Secure self-hosted solution
- 👍 Great Slack alternative
- 💡 Customizable and extensible
- 🧲 Integrates well with other tools

**What reviewers complain about**

- 🐛 Buggy and unstable
- 🔑 Frustrating login/authentication issues
- 🔔 Inconsistent or missing notifications
- 🖼️ Trouble with image/file uploads
- 🕰️ Slow performance and lag

**Reported bugs**

- Crashes on startup
- Unread message indicators not working
- Keyboard issues on iPad/desktop
- Compatibility problems with iOS 17+
- Randomly logs users out

**Requested features**

- Add voice messaging capability
- Improve multi-server support
- Integrate end-to-end encryption
- Introduce iPad-optimized layout
- Provide more customization options


## Frequently asked questions

### Is Rocket.Chat free?

Rocket.Chat is free to download, with no in-app purchases.

### Is Mattermost free?

Mattermost is free to download, with no in-app purchases.

### Which has better reviews, Rocket.Chat or Mattermost?

Mattermost is rated higher. Rocket.Chat averages 4.4 out of 5 from 3.7K ratings, while Mattermost averages 4.8 from 5.6K ratings.

### Do Rocket.Chat or Mattermost have ads?

Neither Rocket.Chat nor Mattermost shows ads.

### Which is updated more often, Rocket.Chat or Mattermost?

Rocket.Chat ships an update every 3 weeks, and Mattermost every 8 days. Most recently, Rocket.Chat was updated on September 23, 2026 and Mattermost on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*