Independent directory of FedRAMP-recognized assessors — not affiliated with GSA, FedRAMP.gov, or any 3PAO.
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FedRAMPAssessors
Independent 3PAO directory

FedRAMP Marketplace — Assessors

Find the 3PAO that gets your ATO across the line.

FedRAMP-recognized assessors (3PAOs) are the independent firms authorized to test your cloud offering against NIST 800-53 controls and write the assessment report an agency sponsor relies on. We track all 48 currently recognized firms, sourced directly from the FedRAMP Marketplace, so you can shortlist by fit before the first call.

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FedRAMP designation pipeline
Ready
In Process
Authorized

A 3PAO conducts the Readiness Assessment (RAR) that earns "Ready," then the full Security Assessment (SAP/SAR) that supports "In Process" and, ultimately, an agency or JAB Authorization to Operate.

48FedRAMP-recognized assessors, per the official Marketplace export
816Cloud service offerings currently being assessed across all firms
12Firms currently qualified for High-impact assessments
2011Year the FedRAMP program was established

How assessment works

What a 3PAO actually does.

A FedRAMP assessor doesn't grant authorization — an agency or the FedRAMP Board does. The assessor's job is to independently test the system and put its name behind the results.

01

Readiness assessment

For CSOs seeking a Ready designation, the 3PAO evaluates whether the system is likely to meet federal requirements and produces a Readiness Assessment Report (RAR).

02

Security assessment

The 3PAO tests controls against NIST SP 800-53, runs vulnerability scanning and penetration testing, and documents findings in a Security Assessment Plan and Report (SAP/SAR).

03

Annual assessment

Authorization isn't a one-time event. The 3PAO returns each year (and after significant changes) to re-test controls and support continuous monitoring.

Methodology

How we build this directory.

Sourced from the Marketplace

Every firm, impact level, accreditation date, and framework tag on this site comes from the official FedRAMP Marketplace assessor export — not manual research or guesswork.

No pay-to-rank

We don't have a pricing or lead-referral relationship with the firms listed here. The "most active" ranking on this page is sorted purely by current assessment volume in the source data.

Verify before you engage

FedRAMP recognition status changes. Always confirm current status on the official FedRAMP Marketplace before signing an engagement letter.

Compare all 48 recognized assessors.

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