Mattermost Deck

Mattermost Deck is a Chrome extension that adds a right-side multi-pane workspace to Mattermost Web. It keeps Mattermost as the primary interface for login, posting, editing, and threads, while giving you a dedicated side workspace for mentions, channels, direct messages, search results, and saved posts.

The extension is designed for workflows where you need to watch multiple streams at once. You can keep important channels visible, review unread items and mentions, track search results, and scan saved posts without constantly switching views. It also includes layout saving, appearance controls, realtime updates, keyword highlighting, and a quick jump-to-latest control for day-to-day monitoring.

Mattermost Deck does not replace the native Mattermost experience. It works as a companion workspace focused on visibility and monitoring, and it activates only on the Mattermost server you configure while reusing your existing browser session.