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Description: A broad overview of the Rev5 path, the reasons to / to not go this path, the sponsorship situation in general, etc.
Purpose: Folks know what's expected in general and how to work through the rest of this section.
FedRAMP Rev5 Certification Rules¶
FedRAMP Rev5 is the legacy FedRAMP authorization model based on NIST SP 800-53 Revision 5. It organizes cloud service security around large documentation packages, control baselines, independent assessment, agency review, continuous monitoring, and a long-running authorization lifecycle.
Rev5 remains important because many existing FedRAMP Authorized services still operate under it. Agencies, providers, and assessors may need Rev5 materials to maintain current authorizations, support reuse, process significant changes, or understand older authorization packages. For those use cases, Rev5 is still part of the FedRAMP operating environment.
But Rev5 is no longer the best starting point for most new cloud service providers. Modern FedRAMP is moving toward 20x, a more cloud-native approach shaped by the FedRAMP Authorization Act and OMB Memorandum M-24-15. That newer model emphasizes automation, reusable evidence, commercial cloud practices, continuous validation, and clearer security outcomes instead of treating a traditional document package as the center of the work.
New providers should be careful about investing heavily in Rev5-specific templates, tooling, consulting, or authorization strategy unless they have a concrete reason to do so. If an agency, existing package, or near-term business requirement requires Rev5, then Rev5 may still be necessary. Otherwise, teams should begin with FedRAMP 20x.
In practice, Rev5 should be treated as compatibility knowledge: useful for understanding the older FedRAMP process and supporting services already in that process, but not the default path for a new provider entering FedRAMP. The center of gravity is shifting, and new work should generally align with where FedRAMP is going rather than where the program has been.