Editorial collection

AI Audit Firms: Independent Directory 2026

For procurement officers, risk managers, and compliance teams commissioning external AI audits — for EU AI Act conformity assessment, NYC Local Law 144 bias audits, ISO 42001 certification, or algorithmic accountability. Covers independent third-party AI audit firms, not software vendors.

Last verified April 21, 2026

Editorial independence: aicompliancevendors.com does not accept vendor payment for inclusion or ranking. Every pick below is editor-selected against the criteria stated on this page, and every factual claim is traceable to a cited public source.

Top picks: BABL AI — Organizations needing ISO 42001 certification and NYC Local Law 144 bias audits; ORCAA — Organizations needing quantitative bias audits with proprietary inference for hiring, insurance, and healthcare; Luminos.Law (ZwillGen AI Division) — Organizations needing combined legal counsel and AI technical audit from one firm. Last updated April 21, 2026; every entry cites public sources.

At a glance

#	Vendor	Best for	HQ	Pricing
1	BABL AI	Organizations needing ISO 42001 certification and NYC Local Law 144 bias audits	Iowa City, US	contact only	Profile
2	ORCAA	Organizations needing quantitative bias audits with proprietary inference for hiring, insurance, and healthcare	New York City, US	contact only	Profile
3	Luminos.Law (ZwillGen AI Division)	Organizations needing combined legal counsel and AI technical audit from one firm	Washington, DC, US	contact only	Profile

Selection criteria

How we decided which vendors qualify for inclusion.

Firm primarily conducts independent third-party AI or algorithmic audits — not only software sales.
Published methodology or scope documentation on the firm's public website.
At least one documented regulatory framework specialization.
Active operations as of April 2026.

Each audit firm's public website was reviewed for service descriptions, regulatory coverage, audit methodology, and industry specialization. Luminos.Law's acquisition by ZwillGen is documented on its site; treated as a combined entity. Ranking follows breadth of services and regulatory coverage.

Note: 1 vendor originally nominated for this list is not yet covered in our directory, so it has been omitted rather than ranked from incomplete data. Rankings below are consecutive among the vendors we have profiled.

The ranking

BABL AI

Best for: Organizations needing ISO 42001 certification and NYC Local Law 144 bias audits

Full profile

BABL AI has explicit service pages for NYC Local Law 144, EU AI Act conformity assessment, ISO 42001 certification, NIST AI RMF, generative AI bias audits, and California AB 331. Audit process: scoping, fieldwork, final report and certification. Average timeline: 2–3 weeks after documentation submission. BABL AI performs ISO 42001 certification audits directly — not only advisory. Enterprise pricing.

Strengths

Performs ISO 42001 certification audits directly.
NYC Local Law 144 bias audits with inference methodology for protected class data.
Three-stage audit process documented.

Limitations

Enterprise-only pricing with no public rates.
Iowa City location may constrain European on-site engagements.

Framework coverage

NYC Local Law 144 (Automated Employment Decision Tools)EU Artificial Intelligence Act ISO/IEC 42001:2023 AI Management System GDPR Article 22 — Automated Individual Decision-Making

ORCAA

Best for: Organizations needing quantitative bias audits with proprietary inference for hiring, insurance, and healthcare

Full profile

ORCAA (New York, founded 2016) uses its Ethical Matrix framework and Pilot platform for quantitative bias measurement, including gender and race/ethnicity inference where unavailable. Double-firewall architecture means ORCAA never sees PII. Only firm in this directory with HTI-1 health IT compliance and insurance fairness testing (INFER). NYC Local Law 144 bias audits are documented. No pricing published.

Strengths

Proprietary Pilot platform with patent-pending inference methodology.
HTI-1 health IT and insurance fairness (INFER) specializations.
Double-firewall privacy architecture for employment data.

Limitations

No self-service monitoring between point-in-time audits.
Enterprise consulting model; no public pricing.

Framework coverage

NYC Local Law 144 (Automated Employment Decision Tools)Colorado Artificial Intelligence Act (SB 24-205)

Luminos.Law (ZwillGen AI Division)

Best for: Organizations needing combined legal counsel and AI technical audit from one firm

Full profile

Luminos.Law joined ZwillGen to create ZwillGen's AI Division, combining AI red team testing and audit capabilities with legal and policy guidance. This blending of technical audit with legal counsel is unique in this directory. Verify current service scope following the merger.

Strengths

Unique combination of technical AI audit and legal AI counsel.
ZwillGen's established legal practice provides regulatory interpretation depth.
Washington, DC headquarters for proximity to US regulatory activity.

Limitations

Merger with ZwillGen may change service scope — verify current offering.
Less documented audit methodology than BABL AI or ORCAA.

Framework coverage

EU Artificial Intelligence Act NIST AI Risk Management Framework Colorado Artificial Intelligence Act (SB 24-205)NYC Local Law 144 (Automated Employment Decision Tools)GDPR Article 22 — Automated Individual Decision-Making

Buyer guidance

Criteria-based recommendations for the most common shortlist scenarios.

For ISO 42001 certification audits, BABL AI is the only firm confirmed to issue certifications directly. For NYC LL 144 bias audits, BABL AI and ORCAA both have documented capabilities; ORCAA's inference methodology differentiates where protected class data is unavailable. Eticas.ai's EU presence is a practical advantage. For legal counsel alongside audit, ZwillGen's AI Division (formerly Luminos.Law) is unique.

What we did not include

Transparency about exclusions.

This directory covers independent AI audit firms only. Software vendors with compliance features are covered in separate collection pages. Consulting firms without public websites documenting AI audit services are excluded.

Frequently asked

What is an AI audit and who is required to conduct one?+

An AI audit is an independent assessment of an AI system's risks, fairness, and regulatory compliance. Mandated contexts: NYC Local Law 144 (annual bias audits), EU AI Act high-risk AI providers (conformity assessment), and ISO 42001 Stage 2. Outside these mandates, audits are voluntary but increasingly requested by procurement teams.

How is an AI audit different from an AI governance platform?+

A governance platform is software for internal AI management and documentation; an audit is an independent third-party assessment producing a report or certification. Governance platforms generate supporting evidence but do not substitute where independent assessment is required (ISO 42001 Stage 2, NYC LL 144, EU AI Act).

How long and expensive is a typical AI audit?+

BABL AI documents a 2–3 week average audit timeline after documentation submission. No firm in this directory publishes pricing. ISO 42001 certification costs are analogous to ISO 27001: $10,000–$50,000+ depending on organization size and audit firm.

Sources

Keep reading

Guide

ISO/IEC 42001 Certification: The Complete Path to AIMS in 2026

How to achieve ISO/IEC 42001:2023 certification: clause-by-clause walkthrough of all 10 clauses and…

FAQ

NYC Local Law 144 bias audit: what employers must do

FAQ

What is Audit?

Last verified April 21, 2026

Collections are re-verified quarterly. If a vendor claim here is stale, tell us — we update within 48 hours.

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