Mattermost
Mattermost provides a collaboration platform for integrating people, processes, tools, and AI infrastructure.
About Mattermost
Mattermost provides a collaboration platform that combines messaging, workflow automation, task management, calls, and AI agents. It is designed to run self-hosted, in private cloud, or in air-gapped networks, with organizations keeping control of data, models, and keys.
It includes searchable channels, threads, and direct messages with per-channel permissions and retention, repeatable playbooks for incident response and compliance tasks, and message exchange with federated servers and Microsoft Teams, Matrix, and XMPP.
Key features
- Searchable history across channels, threads, and direct messages
- Per-channel permissions and retention with acknowledgment tracking
- Repeatable playbooks with checklists, SLA timers, and escalation
- Channel-based calls and screen sharing with transcription and summaries
- Federated messaging across servers and interoperability with Teams, Matrix, XMPP
- AI agents that summarize alerts using a chosen or self-hosted model
Best for: National security, critical infrastructure, and regulated enterprise teams that need self-hosted or air-gapped operation.
Good for
- Can run self-hosted, in private cloud, or fully air-gapped
- Lets organizations use a chosen LLM provider or a self-hosted model
- Exchanges messages with federated servers, Microsoft Teams, Matrix, and XMPP
Mattermost at a glance
- Website
- mattermost.com
- Category
- Software & Utilities › Text Editors
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Mattermost FAQ
Where can Mattermost be deployed?
In self-hosted, private cloud, or fully air-gapped environments, including classified networks.
Which outside messaging systems can it connect with?
Microsoft Teams, Matrix, and XMPP, plus federated Mattermost servers over secure links.
How are AI models provided?
Organizations can use an LLM provider of their choice or a self-hosted model in air-gapped environments.
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