The Proven Upgrade

Mission-Critical
Mattermost Alternative

Replace Mattermost with Rocket.Chat for secure, self-hosted
messaging and full control over your comms infrastructure.

Encrypted & ephemeral. Chats that auto-expire.

Self-hosted LLMs. Verified data, powered by you.

Clearance-aware access. Real-time ABAC controls.

Interoperate without lock-in across platforms.

Schedule your demo

Get a Deployment Maturity Assessment
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Deployed by secure organizations globally

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Secure CommsOS™

for mission-critical operations

Unify collaboration in one place. Bring chat, voice, file sharing, and AI together in one sovereign, compliant platform—secure, streamlined, unified.
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Deploy where you operate

Run your stack on-premises, air-gapped, or on a private cloud— fit to your existing infrastructure.
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Maximize your Microsoft investment

Leverage native Microsoft integrations and enable secure cross-platform messaging between Rocket.Chat and MS Teams users to embed multi-platform collaboration into your workflow.
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Trusted by mission-driven teams nationwide

Here’s what our customers and partners have to say

"The security and flexibility of Rocket.Chat to scale up and down for 4000+ participants during cyber defence exercises has been very important."
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"At Deutsche Bahn, we chose Rocket.Chat over Mattermost. We chose Rocket.Chat because of the way they've always done open source."
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"Unlike other platforms that isolate developer communities, Rocket.Chat makes it incredibly easy to collaborate with external partners."
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Get started with your deployment

Launch Rocket.Chat your way—using Docker, Kubernetes, or Launchpad for custom setups, or deploy instantly on AWS and DigitalOcean with our Rapid Cloud options. If you prefer, we can even set you up with a POC environment, hosting on us! Flexibility and control, wherever you operate.

Key use cases

Defense & Intelligence: Classified communications with E2EE, sovereign AI enriched with proprietary intel , air-gapped deployment for secure operations, and RBAC/ABAC controls for multi-level security clearances.

Government Agencies: Cross-agency collaboration via native Matrix federation, built for GDPR compliance, complete data sovereignty, and persistent audit trails for legal requirements.

Critical Infrastructure: Zero Trust architecture with dynamic access controls, on-premise deployment for operational security, and 24/7 mission-critical support.

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Have questions? 

Here's what we often hear

How does migration from Mattermost work?
Will we lose conversation history?
How does pricing compare?
What about training for our team?
What support is available?
Don't just take our word for it
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Ready for collaboration without compromise?

End-to-end encryption, sovereign AI, and granular access controls—with complete deployment flexibility. Discover why organizations trust Rocket.Chat for mission-critical communications.

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