FedRAMP 20x vs Rev5
FedRAMP 20x and Rev5 answer the same question — whether a cloud offering is suitable for federal use — with different artifacts and cadences. Rev5 is control-catalog and SSP-centric. 20x is KSI- and SDR-centric under CR26. Organizations mid-transition often run both.
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
Rev5 Moderate in this product is a 323-control baseline. 20x CR26 publishes 10 KSI families and 46 indicators. The SDR (2026-06-24) replaces the SSP. Dual cadence during transition is Rev5 monthly ConMon plus 20x quarterly OCR. The honest evidence layer maps one derived graph to OSCAL assessment-results, KSI JSON, and an optional POA&M.
How to implement
Keep producing the Rev5 monthly package until FedRAMP.gov says that path is closed for the offering. Add the 20x SDR, KSI evidence, and quarterly OCR without dropping ConMon. Use the 20x vs Rev5 Explorer when it ships. Confirm every calendar date on the official deadlines page.
Common mistakes
- Stopping monthly ConMon the day a 20x package is first assembled. - Treating a 323-control matrix as interchangeable with the 46 KSIs without a mapping. - Copying a date from a blog instead of FedRAMP.gov deadlines. - Assuming Class D is an authorized High path while RFC-0033 is still a proposal.
Comparison matrix
| Topic | Rev5 | FedRAMP 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. |
Interactive view: FedRAMP 20x vs Rev5 Explorer (in progress). Official dates: FedRAMP path deadlines.
Questions teams ask
- Do we drop Rev5 monthly ConMon when we start 20x?
- No. Dual cadence means monthly ConMon and quarterly OCR together until the official path for that offering says otherwise.
- Is the SDR the same as the SSP?
- No. FedRAMP published the SDR as the replacement for the traditional SSP. Field names come from the 2026-06-24 schema.
- Where are the hard transition dates?
- On FedRAMP.gov path deadlines. scm.cc does not substitute a guessed calendar.
Related hub pages
Primary sources
- FedRAMP 20x overview & Core Principles (retrieved 2026-09-27)
- FedRAMP launches Consolidated Rules for 2026 (CR26) (retrieved 2026-09-27)
- Security Decision Record (replaces the SSP) (retrieved 2026-09-27)
- FedRAMP 20x Key Security Indicators (CR26) (retrieved 2026-09-27)
- Collaborative Continuous Monitoring (CCM / Ongoing Certification Report) (retrieved 2026-09-27)
- FedRAMP Certification reference (classes, KSI metrics window) (retrieved 2026-09-27)
- FedRAMP path & transition deadlines (retrieved 2026-09-27)
- NIST SP 800-53 Rev 5 (security & privacy controls) (retrieved 2026-09-27)
Last verified 2026-09-27. FedRAMP.gov is authoritative.