Best Free and Open Source Mattermost Clients

Mattermost is a self-hosted team communication and collaboration platform. It provides an open source alternative to proprietary services such as Slack and Microsoft Teams, giving organisations greater control over their data, infrastructure and communications.

Mattermost is particularly useful for software development teams, IT departments, DevOps engineers and organisations managing distributed workforces. Its integration with development tools makes it especially attractive for teams working on software projects, while its incident management capabilities help coordinate responses to technical problems.

It’s also a good choice for businesses, public sector organisations and other groups that prefer to keep internal communications on infrastructure they control. Self-hosting requires some technical expertise, but provides greater flexibility over deployment, configuration and data management.

• Team messaging – public and private channels, direct messages and threaded conversations.
• File sharing – exchange documents, images and other files with colleagues.
• Voice calls and screen sharing – communicate directly with team members.
• Workflow automation – Playbooks help coordinate incidents, tasks and repeatable processes.
• Integrations – connects with GitHub, GitLab, Jira and other development tools.
• Self-hosting – deploy the server on your own Linux infrastructure using PostgreSQL.
• Cross-platform support – desktop clients for Linux, macOS and Windows, together with mobile and web access.

For organisations already using Mattermost, choosing the right client can make a significant difference to everyday productivity. The available clients offer different approaches to messaging, ranging from comprehensive graphical interfaces to lightweight terminal applications.

Here’s our verdict captured in a legendary LinuxLinks-style ratings chart. Only free and open source software is eligible for inclusion.

Click the links in the table below to learn more about each client.

Explore our carefully curated directory of recommended free and open source software, covering every major software category. The directory forms part of our extensive collection of articles for Linux enthusiasts. It includes hundreds of detailed reviews, together with free and open source alternatives to proprietary software from companies such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. LinuxLinks also covers interesting projects worth exploring, Linux-compatible hardware, free programming books and tutorials, and much more. Know a useful free and open source Linux application that we haven’t covered? Tell us about it using our submission form.