FedRAMP 20x vs Rev5 Explorer

The comparison matrix from the 20x vs Rev5 page: package artifact, validation style, monitoring, assessor posture. Educational, not a migration plan.

Educational resource only. scm.cc is not a FedRAMP Recognized Independent Assessor (3PAO) and is not FedRAMP-authorized; it grants no authorization, certification, or assessment outcome. FedRAMP.gov is the authoritative source. This is not legal advice.

Technical detail

Rows are scm.cc-authored restatements with official citations on the source page. Class and date details must be confirmed on FedRAMP.gov.

How to implement

Use it to brief a team, then open the official 20x and certification pages. The fundamentals course covers assessor-side implications.

Related hub pages

Primary sources

FedRAMP 20x overview & Core Principles (retrieved 2026-09-27)
FedRAMP 20x Key Security Indicators (CR26) (retrieved 2026-09-27)
FedRAMP Certification reference (retrieved 2026-09-27)
Security Decision Record (retrieved 2026-09-27)
Collaborative Continuous Monitoring (retrieved 2026-09-27)
FedRAMP Marketplace (retrieved 2026-09-27)
FedRAMP path & transition deadlines (retrieved 2026-09-27)

Last verified 2026-09-27. FedRAMP.gov is authoritative.

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Marketplace

Topic	Rev5	20x
Philosophy	Point-in-time authorization around a large document package and control-by-control assessment against the Rev5 Moderate baseline.	Automation, machine-readable evidence, and continuous validation under the FedRAMP 20x Core Principles and CR26.
Core package artifact	System Security Plan (SSP) plus supporting assessment documents.	Security Decision Record (SDR) replaces the traditional SSP. Schema pinned 2026-06-24 on FedRAMP.gov.
What is demonstrated	FedRAMP Rev5 Moderate baseline in this repo is 323 controls, grounded in NIST SP 800-53 Rev 5.	Key Security Indicators: 10 families and 46 indicators under CR26.
Ongoing cadence	Monthly continuous monitoring (ConMon) packages, plus annual assessment where the program still requires it.	Collaborative Continuous Monitoring with a quarterly Ongoing Certification Report (OCR) cycle.
Transition cadence	Keep monthly ConMon while the offering remains on the Rev5 path.	Run 20x quarterly OCR in parallel. One cadence per tenant is not enough while both programs apply.
Evidence interchange	OSCAL 1.1 assessment-results (and POA&M when a remediation register exists).	KSI JSON clustered from the same derived verdicts. scm.cc's rev5-bridge emits both from one evidence graph so the two artifacts cannot disagree.
Impact pairing	Low / Moderate / High impact levels on the Rev5 catalog.	Classes B, C, and D pair with Low, Moderate, and High during the transition through 31 December 2026. Class A is a pilot. Class D remains proposal-stage (RFC-0033) until FedRAMP.gov says otherwise.
Transition deadlines	Path close and update dates are published by FedRAMP, not by scm.cc.	Read https://fedramp.gov/2026/providers/updating/deadlines/ for current dates. This page does not invent a mandatory calendar.