Not CUI Compliant
1 NIST 800-171 gaps detected. No certified FedRAMP Marketplace record for Mattermost as of 2026-07-27 — searched the live registry at fedramp.gov/marketplace. Get any authorization or equivalency claim in writing from the vendor and assess it yourself under DFARS 252.204-7012(b)(2)(ii)(D).
Mattermost
by Mattermost
FedRAMP Status
Not FedRAMP Authorized
Impact Level
N/A
Category
Collaboration
Overview
Mattermost holds no FedRAMP authorization we can source. There is no FedRAMP Marketplace record for Mattermost in the live registry at fedramp.gov/marketplace, read 2026-07-27. Treat any authorization or equivalency claim as something to obtain in writing from the vendor and to assess yourself under DFARS 252.204-7012(b)(2)(ii)(D).
CUI Risk Assessment
No certified FedRAMP Marketplace record for Mattermost as of 2026-07-27 — searched the live registry at fedramp.gov/marketplace. Get any authorization or equivalency claim in writing from the vendor and assess it yourself under DFARS 252.204-7012(b)(2)(ii)(D).
Deployment & Architecture
Deployment Model: Self-hosted (open-source)
Mattermost has no FedRAMP authorization on record. DFARS 252.204-7012(b)(2)(ii)(D) requires an external cloud service provider to meet security requirements equivalent to the FedRAMP Moderate baseline — an authorization is the straightforward way to show that, but it is not the only one. Without one, the burden is on you to establish, document, and defend equivalency, and to meet the clause's incident-reporting and media-preservation obligations. Most contractors find an authorized alternative cheaper than carrying that burden.
Migration Checklist
- 1ISSO shall document Mattermost as a non-compliant system requiring risk acceptance in the POA&M with specific reference to NIST 800-171 control 3.13.8 violation.
- 2System administrator must implement FIPS 140-2 Level 2 validated encryption modules for all Mattermost data transmission and storage components.
- 3Network security team shall configure network-level encryption using IPSec or TLS 1.3 tunnels for all Mattermost client-server communications.
- 4ISSO must update the authorization boundary diagram to clearly delineate Mattermost servers within the CUI processing environment boundaries.
- 5Contracts officer shall coordinate with government contracting officer representative (COR) to document risk acceptance for using non-FedRAMP authorized collaboration tool.
- 6System administrator must configure centralized authentication integration with existing PKI infrastructure to support CAC/PIV smart card access.
- 7ISSO shall implement comprehensive audit logging configuration to capture user activities, file transfers, and administrative actions per NIST 800-171 AU-2 requirements.
- 8Legal team must review data residency requirements and ensure all Mattermost data storage locations comply with DFARS 252.204-7012 covered defense information restrictions.
- 9ISSO must establish data loss prevention (DLP) monitoring rules to detect and prevent unauthorized CUI transmission through Mattermost channels.
- 10System administrator shall configure automated backup and recovery procedures with encryption for all Mattermost databases and file storage repositories.
NIST 800-171 Violations
Using Mattermost for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
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Related Compliance Assessments
Frequently Asked Questions
Is Mattermost FedRAMP authorized?
There is no FedRAMP Marketplace record for Mattermost in the live registry at fedramp.gov/marketplace, read 2026-07-27. Treat any authorization or equivalency claim as something to obtain in writing from the vendor and to assess yourself under DFARS 252.204-7012(b)(2)(ii)(D).
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