Mattermost

Mattermost is an open source team communication platform focused on zero-trust collaboration, automation, and AI, capable of running in private cloud, self-hosted, and fully air-gapped environments. The platform is aimed at national security, critical infrastructure, and regulated enterprises, emphasizing that users retain control over their data, models, and keys.

Key Capabilities

• Secure messaging and collaboration: Provides fully searchable history across channels, threads, and direct messages, with support for per-channel permissions and retention policies. Priority messages can track acknowledgment status. It can be used on Web, desktop, mobile, and embedded within Microsoft Teams.
• Workflow automation: Provides repeatable playbooks for incident response, change management, and compliance, with support for conditional checklists, SLA timers, and escalations. Events from external systems can automatically trigger playbooks.
• Human-agent collaboration: Sovereign AI agents can use the LLM provider chosen by the user or self-hosted models in air-gapped environments to summarize, enrich alerts, and take action. Agents can hand off tasks to other agents through open APIs, and human-agent collaboration is built into every workflow.
• Audio and screen sharing: Conduct calls and screen sharing within any channel, using your own call server, with support for real-time transcription and AI summaries.
• Federation and interoperability: Share messages and files between federated Mattermost servers through secure links, with standards compatibility to support coalition operations. Interoperate in real time with Microsoft Teams, Matrix, and XMPP, support partner and coalition work, and enable native real-time translation within channels.
• Classified information control: Provide classification banners and labels, attribute-based dynamic access control (ABAC), timed message expiration, and burn-after-reading to control data leakage. Compatible with cross-domain solutions (CDS). FIPS 140-3 validated, STIG-hardened images.
• Integration framework: Provide a REST API compliant with the OpenAPI 3.0 specification, incoming and outgoing webhooks, slash commands, and interactive dialogs. Prebuilt and custom integrations cover operations, security, and DevSecOps tools, backed by an extensible, audited, and hardened open source supply chain.
• Management and governance: Support SAML, LDAP/AD, and SCIM provisioning, hardware key MFA, and SIEM-ready audit logs. Retention policies and eDiscovery exports (including legal hold) can be applied by channel or team.
• Project management: Provides kanban, table, calendar, and gallery boards, allowing tasks to be assigned and tracked alongside conversations, flexibly supporting issue tracking for tasks and IT work.

Deployment Methods Users can decide where operations run, from sovereign public clouds to fully disconnected classified networks. Each deployment includes the full platform:

• Sovereign Cloud: Azure, Oracle, Google, and AWS, in user-controlled regions and tenants.
• On-Premises/Private Cloud: Deployed on infrastructure the operator already trusts.
• Air-Gapped: Fully disconnected installations for classified and restricted networks.
• Hybrid/Multi-Region: Across sites and classification levels while maintaining a single control plane.
• Edge Deployment: Lightweight installations on ships, vehicles, and forward operating bases. Operates fully disconnected and automatically syncs when connectivity is restored. Supports 200,000+ concurrent users, with high-availability and ultra-high-availability clusters.

Use Cases

• National Security: Plan and execute missions with coalition partners on classified networks or with limited connectivity, using a zero-trust application suite, running on your own infrastructure and federating across mission partner networks.
• Intelligence Community: Share intelligence and operational data across classification boundaries without physically moving data or relying on uncontrolled voice coordination.
• Government and Public Sector: Work across departments and agencies, with records retained domestically and preserved according to policy.
• Law Enforcement and Public Safety: Share photos, locations, and updates as incidents unfold, with separate channels, files, and response playbooks for each case or incident.
• Energy and Utilities: Keep control rooms and field teams coordinated when cyberattacks or grid failures cripple enterprise IT.
• Financial Services: Resolve trading and security incidents while retaining the complete records regulators expect.
• Manufacturing: Coordinate responses across plant, engineering, and security teams without exposing design IP.
• Technology: Coordinate engineers across dozens of tools and stay responsive when primary systems go down.

Limitations Specific fees, pricing, platform details, and usage steps are not provided at this time.