Matras – native Mattermost client for GNOME

Matras is a native Mattermost client designed for the GNOME desktop environment. Written in Rust and built with GTK4 and libadwaita, it provides access to Mattermost’s team communication platform without relying on an Electron-based interface.

The application brings together channel conversations, direct messages, threaded discussions and voice and video calls. Its adaptive interface uses a channel sidebar, conversation area and contextual panel for threads or the inbox. The layout adjusts to narrower windows, making it suitable for different screen sizes.

Matras communicates with Mattermost servers through their REST API and WebSocket connections. It supports multiple server accounts and stores authentication tokens using the desktop’s Secret Service. Some functionality remains incomplete, including browsing older message history, link previews and slash commands.

This is free and open source software.

Key Features

• Supports password authentication, multi-factor authentication and browser-based single sign-on.
• Manage teams, channels and direct conversations, including channel membership, bookmarks and notification preferences.
• Threaded discussions with synchronised message drafts and an inbox for mentions, followed threads and saved posts.
• Send, edit, delete, pin and schedule messages, with support for message priorities and acknowledgements.
• Markdown formatting, emoji reactions, custom emoji and autocomplete for usernames and emoji.
• Share images and files, with drag-and-drop support and resumable uploads.
• Search conversations and attachments, with Ctrl+K for quickly switching between channels and contacts.
• Voice and video calls with screen sharing, participant controls and a persistent call dock.
• Desktop notifications and live message updates, with automatic reconnection after interruptions.
• Virtualised message rendering and configurable caching of profile pictures and media.
• Optional integration with Mattermost’s Agents LLM plugin for streamed responses and conversation summaries.

Website: altlinux.space/toxblh/matras
Support:
Developer: Anton Palgunov
License: GNU General Public License v3.0

Matras is written in Rust. Learn Rust with our recommended free books and free tutorials.

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