Mattermost

Mattermost builds a collaboration platform for organisations that must keep tight control of their own data, such as governments, militaries and regulated enterprises. The US company combines secure messaging, workflow automation and AI tools that can run in private and disconnected environments.

What Mattermost offers

• Secure messaging and collaboration — team chat and coordination for mission-critical work.
• Workflow automation — automated processes that link people, tools and systems.
• Sovereign AI — AI features that stay inside the customer's own infrastructure.
• Flexible deployment — on-premise, private cloud, and air-gapped or classified environments.
• Security and governance — identity and access controls, network hardening, data protection and information governance.
• Open platform — full access to its APIs and open-source code, plus integrations with other systems.

Who it works with

Government and public sector bodies, national security and critical infrastructure operators, healthcare and life sciences, and enterprise risk and compliance teams. It is also used for out-of-band communication during incident response, and one consortium moved to it from Slack for data control reasons.

Key facts

• Based in: United States
• Source model: open-source code available
• Certification: a professional certification programme for engineers