Overview
Mattermost provides team messaging and collaboration for organizations that need control over deployment and data. Its platform includes channels, direct messages, file sharing, workflow automation, integrations, APIs, and deployment options for self-hosted, cloud, and isolated environments. It also supports administration, permissions, and retention controls for managed workspaces. The official site describes Sovereign AI capabilities for organizations operating in regulated or mission-critical settings. The public server repository contains product source under Mattermost's licensing policy, including AGPL-3.0-covered source, while some components and compiled distributions have additional terms.