Is this a ranking of audit firms?

No. This lookup shows checked facts from official accreditation registries. It is not a ranking, score or endorsement.

Do I need to subscribe to search?

No. The interactive lookup is free without an email. The open dataset (CC BY 4.0) is also free to download with no sign-up. Subscribing for accreditation-change alerts unlocks print and exports sitewide.

How do I confirm a firm myself?

Each verification card links to the official registry row we last checked (ANAB, UKAS, PCI SSC, HITRUST, FedRAMP, Cyber AB, CERT-In, CPAverify and others). Search the legal name on that registry before you engage the firm.

Check an Auditor — free accreditation lookup | Agent Index by Heritage Services

Name: Agent Index auditors.json
Creator: Heritage Services
License: https://creativecommons.org/licenses/by/4.0/

Free tool · 518 Verified · 51 registry-listed firms · dataset 0.1.33 · 23 Oct 2026

Check an Auditor

Instant lookup across every compliance audit firm in Agent Index (518 Verified · 51 registry-listed). Search by firm name, headquarters, framework or accreditation body. This firm appears on the official registry, not independently verified by Agent Index. Facts only — not a ranking or endorsement.

Official registries this lookup is built from

Verified firms were cross-checked against at least one official registry. Registry-listed firms cite the official registry only. Use the same lists to confirm a name yourself:

CPAverify / state boards of accountancy — US CPA firm licences for SOC examination claims
ANAB Management Systems CB Directory — US ISO/IEC 27001 (and related) certification-body accreditation
UKAS certification-body schedules — UK ISO/IEC 27001 certification-body accreditation
HITRUST External Assessor list — HITRUST Authorized External Assessors (not readiness licensees)
PCI SSC Qualified Security Assessor list — PCI DSS QSA companies
FedRAMP Marketplace assessors — FedRAMP-recognized 3PAO assessors
Cyber AB Marketplace — CMMC C3PAO listings
CERT-In empanelled auditors list — India CERT-In empanelment
NABCB management-system certification bodies — India ISO/IEC 27001 (and related) certification-body accreditation
Standards Council of Canada accredited organizations — Canada ISO/IEC 27001 (and related) certification-body accreditation
CPA Alberta firm verification — Alberta CPA firm registration for SOC examination claims
JAS-ANZ accredited bodies register — Australia / New Zealand ISO/IEC 27001 (and related) certification-body accreditation
INAB management-systems certification bodies — Ireland ISO/IEC 27001 certification-body accreditation
EIAC directory — UAE ISO/IEC 27001 certification-body accreditation
DAkkS accredited-bodies database — Germany ISO/IEC 27001 (and related) certification-body accreditation
RvA (Dutch Accreditation Council) register — Netherlands ISO/IEC 27001 (and related) certification-body accreditation
ISMS-AC accredited ISMS certification bodies — Japan ISO/IEC 27001 (and related) certification-body accreditation
ISMAP audit institution list — Japan ISMAP (government cloud security) audit institutions
GovRAMP accredited 3PAO list — GovRAMP A2LA-accredited third-party assessment organizations
Inmetro/Cgcre accredited information security management system certification bodies — Brazil ISO/IEC 27001 certification-body accreditation
Saudi Accreditation Center (SAAC) accredited bodies — Saudi Arabia ISO/IEC 27001 (and related) certification-body accreditation

Headquarters countries currently in the dataset: United States, United Kingdom, India, Australia, Canada, Singapore, Ireland, United Arab Emirates, Germany, Netherlands, Japan, Israel, Brazil, Saudi Arabia, Mexico, New Zealand, Malaysia. Example HQ labels include United States and India.

Check an Auditor

Official registries this lookup is built from

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