Mattermost and Rocket.Chat are both open-source, self-hostable collaboration platforms, but they have some key differences in their focus and features. Both open-source collaboration solutions are available on FlatHub.


Mattermost is geared towards technical teams, focusing on collaboration features like code sharing and workflow automation.


Rocket.Chat is more feature-rich and customizable, often preferred for enterprise-level communication.

The Mattermost logo and the Rocket.Chat logo on a white and pink background.

KDE and Gnome are probably the two most popular desktop environments available for Linux. Both have a dedicated Matrix client that is available to install as a Flatpak package.

NeoChat is a simple Matrix client actively being developed as part of the KDE ecosystem.
flathub.org/apps/org.kde.neoch

Fractal is a Matrix messaging client for the GNOME desktop written in Rust.
flathub.org/apps/org.gnome.Fra

The KDE Matrix client Be chat logo and the Gnome Matrix Client Fractal logo on a white background.
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