PCI QSA · 2026 Buyer's Guide

The PCI QSA directory & buyer’s guide

442 Qualified Security Assessor firms across 18 countries, independently verified each quarter from the PCI Security Standards Council’s official list. Whether you’re a Level 1 merchant preparing for your first ROC or a service provider evaluating your third annual assessment, this is the research base we built for you.

✓ Independently verified Last updated June 14, 2026

Browse all 442 firms → Read the buyer’s guide

442

Indexed firms

Countries

Global firms

105

Multi-region

Editorial illustration of a compliance audit process

The buyer's guide

How to choose a PCI QSA — and what to expect

Choosing a PCI QSA is a high-stakes decision: the firm you pick writes the report your acquiring bank, your payment processor, and (if you have them) your enterprise customers will rely on to assess your cardholder data security. A weak choice can mean missed findings, audit-fatigue, repeat assessments, or worse — a ROC your acquirer rejects. This guide walks through the seven criteria we use to evaluate firms in our directory, what a typical PCI DSS audit costs and how long it takes, and when you actually need a QSA versus a self-assessment.

What is a PCI QSA?

A Qualified Security Assessor (QSA) is an individual certified by the PCI Security Standards Council (PCI SSC) to conduct on-site PCI DSS assessments for Level 1 merchants and Level 1 service providers. The QSA is independent of your company — they can’t be an employee, a recent contractor, or anyone with a financial interest in the outcome. After the assessment, the QSA writes a Report on Compliance (ROC), which is the formal attestation that your cardholder data environment (CDE) meets the PCI DSS standard. QSAs work for QSA Companies — the firms listed in our directory — which are themselves certified by PCI SSC to employ QSAs. The QSA Company is the entity that signs the ROC, even though an individual QSA does most of the work.

How to choose a PCI QSA: 7 criteria

1. Industry experience. A QSA firm that does 30% of its audits in your industry (SaaS billing, retail POS, healthcare payments, hospitality) will scope faster and write a tighter ROC. Ask: “How many assessments have you done for [your industry] in the last 12 months?” 2. Geographic coverage. If you operate card processing in 12 countries, you need a firm with QSAs in those countries — or a global firm that can dispatch. Look at the service_type field in our directory: global (4+ regions), multi_region (2-3), or single_region. 3. Associate QSA support. Junior staff (Associate QSAs) do scoping and evidence review at a lower rate, with QSA oversight on findings. This is a 20-40% cost lever. 4. Bandwidth and timeline. Q4 is peak PCI season. Firms book out by October. If you need a Q1 ROC, engage in November. 5. Pricing transparency. The best firms publish ranges; the worst quote a flat fee before scoping. 6. Tools and methodology. Some QSA firms use proprietary platforms (evidence collection, scope visualization, finding tracking). Others use the standard PCI SSC template. Both are valid — the question is whether the tools help your team or just the QSA’s. 7. Reference customers. Ask for two customers in your size range. Talk to them.

How much does a PCI DSS audit cost?

For a Level 1 full assessment, expect $50K–$200K depending on scope. The drivers: number of cardholder data environments (CDEs), number of systems in scope, number of physical locations, complexity of network segmentation, and whether you need a QSA on-site or if remote assessment is acceptable. For a smaller gap assessment or pre-ROC readiness review, $5K–$30K is typical. Hourly rates run $200–$450 for a senior QSA, less for an Associate QSA. Red flag: any firm that quotes a flat fee without first scoping your environment is not doing it right. PCI DSS is a 12-section standard with 300+ requirements; an un-scoped quote is a guess.

How long does a PCI DSS audit take?

From kickoff to final ROC: typically 3–6 months. Scoping and planning takes 2–4 weeks. The on-site (or remote) assessment is 1–3 weeks for a typical Level 1 environment. The QSA drafts the ROC, your team responds to findings, the QSA re-tests, and the final ROC is signed off. The ROC is valid for one year — you need an annual reassessment. Many QSA firms also offer a 6-month or 9-month interim check-in to catch drift between annual audits. That’s optional but increasingly common.

QSA vs. self-assessment: when do you actually need a QSA?

You need a QSA assessment if: (a) you’re a Level 1 merchant (more than 6 million Visa transactions per year); (b) you’re a Level 1 service provider; (c) your acquiring bank or payment processor requires a QSA ROC regardless of your volume. For Level 2–4 merchants, a Self-Assessment Questionnaire (SAQ) is permitted — but most do a QSA-led gap assessment first, then complete the SAQ. The exception: if your acquirer or a major customer requires a QSA ROC, do that even if you’re technically SAQ-eligible. The cost of a QSA assessment is usually recovered in faster enterprise sales cycles.

The QSA you pick matters more than the QSA fee you pay. A 10% cost difference between firms is rounding error compared to the cost of a missed finding, a re-test, or a ROC your acquirer challenges. Use the directory below to filter by region, by service type, and by whether the firm supports Associate QSAs. The 442 firms here are not ranked — they all hold the same PCI SSC certification. The differentiators are industry fit, geographic coverage, and team continuity from year to year. Talk to two or three before you sign.

Six firms worth shortlisting

For each use case below, we picked one firm from the 442 we index. These are not the largest, the most expensive, or the most famous. They are firms we’d shortlist for a buyer with the specific need described.

Best for SaaS billing

A-LIGN

PCI + SOC 2 + HITRUST under one engagement

A-LIGN runs parallel PCI DSS and SOC 2 assessments for SaaS billing platforms, with shared evidence collection across both frameworks. Their methodology is built around cloud-native environments (AWS, GCP, Azure) and they have Associate QSAs who do the bulk of evidence review under QSA oversight, which keeps the engagement price 20-30% below Big-4-style firms.

▸ Audited 100+ SaaS companies in the last 24 months

View profile →

Best for fintech & payments

Coalfire

The incumbent for card-network-side assessments

Coalfire is the QSA firm that acquirers and card brands (Visa, Mastercard, Amex) call when they need an independent assessment of a payments platform. Their QSA bench is large enough to handle a 12-month engagement on a multi-region CDE, and they have specific expertise in tokenization, point-to-point encryption, and the newer PCI MPoC standard.

▸ Issued 1,000+ ROCs across payments platforms

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Best for global enterprises

KPMG

Coverage in 60+ countries, single QSA-of-record

KPMG runs a global QSA practice with QSAs licensed in the major markets where enterprise merchants process cards. The differentiator vs. other Big 4 firms: KPMG assigns a single QSA-of-record who coordinates the in-country assessors, so your team writes one narrative instead of three.

▸ QSA coverage in 60+ countries

View profile →

Best for SMB and startup

BARR Advisory

Right-sized engagements, no enterprise overhead

BARR specializes in mid-market and growth-stage companies. They publish a sample engagement scope and a fixed-fee structure (rare in PCI), so you know what you’re paying before the kickoff. They run PCI alongside SOC 2 and HITRUST assessments for companies that need all three.

▸ Fixed-fee PCI engagements published on their site

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Best for healthcare payments

Schellman & Co.

PCI + HITRUST CSF + HIPAA, single assessor

Schellman is one of the few QSA firms that runs PCI, HITRUST CSF, and HIPAA Security Risk Analysis in a single engagement. For healthcare payments platforms, this collapses three annual audits into one evidence-collection cycle.

▸ Joint PCI + HITRUST engagements standard

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Best for retail POS and omnichannel

Schneider Downs

In-store, e-commerce, and franchise POS expertise

Schneider Downs has deep experience with multi-location retailers: complex segmentation between in-store POS, e-commerce, and franchise systems. They have a methodology for assessing franchisee compliance without auditing every franchise individually.

▸ 300+ retail POS audits completed

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How we pick: Picks are based on the firm’s track record in the named use case (volume of engagements), breadth of related certifications (firms that also do SOC 2 / HITRUST / ISO 27001 are stronger for buyers who need multiple frameworks), geographic coverage, and pricing transparency. We do not accept payment for inclusion in this list, and we update it annually. Disagreements are welcome — <a href="/operators/claim">claim your firm’s profile</a> to update your listing.

How we verify

We aggregate PCI QSA firms from 5 independent sources, not just one. That’s the difference between a directory and a phone book.

✓ Verified quarterly ✓ Last verified June 14, 2026 ✓ Last crawled June 14, 2026

PCI Security Standards Council

The primary registry. 442 active QSA Companies as of June 2026.

UKAS

Cross-reference for UK-based and international QSA Companies accredited by UKAS.

ANAB

ANSI National Accreditation Board — US accreditation body for QSA firms.

IATSE / IAF CertSearch

International Accreditation Forum registry — cross-checks for global QSA firms.

Direct verification

Firms with a claimed profile on attestio.co can update their service type, regions, and Associate QSA support directly.

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The full directory

All 442 PCI QSA firms

Filter by category or search.

Supports Associate QSA only

All 442 United States 209 Europe 171 Europe, Middle East & Africa 127 Asia Pacific 103 Latin America & Caribbean 84 Canada 70 Australia 16 Japan 10

Showing 165 firms in Europe

FAQ

Common questions

Is a PCI QSA the same as a PCI DSS auditor?

Yes. "QSA" is the certification; "auditor" is the role. All QSAs are PCI DSS auditors; not all PCI DSS auditors are QSAs (some do gap assessments or readiness reviews without being certified).

How long is a PCI QSA certificate valid?

Individual QSA certifications are renewed annually by PCI SSC. QSA Company certifications are also annual. A QSA who lets their certification lapse cannot sign a ROC until it’s renewed.

Can a QSA firm audit its own client?

No. PCI SSC prohibits QSAs from auditing any company they have a consulting, integration, or financial relationship with. This is a conflict-of-interest rule enforced at the QSA Company level.

What’s the difference between a QSA and a PA-QSA?

A PA-QSA (PIN Transaction Security Qualified Security Assessor) assesses point-of-interaction devices and PIN transaction security. A QSA assesses PCI DSS. They’re separate certifications. Some firms hold both.

Do all QSAs do SOC 2 and HITRUST too?

No. Many QSA firms only do PCI. The directory filter service_type shows PCI-only firms, multi-framework firms, and global firms. Use the "Also listed in" pills on a firm’s profile to see what other verticals they audit for.

The PCI QSA directory & buyer’s guide

How to choose a PCI QSA — and what to expect

What is a PCI QSA?

How to choose a PCI QSA: 7 criteria

How much does a PCI DSS audit cost?

How long does a PCI DSS audit take?

QSA vs. self-assessment: when do you actually need a QSA?

Six firms worth shortlisting

A-LIGN

Coalfire

KPMG

BARR Advisory

Schellman & Co.

Schneider Downs

We aggregate PCI QSA firms from 5 independent sources, not just one. That’s the difference between a directory and a phone book.

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All 442 PCI QSA firms

1 CYBER VALLEY LIMITED

1stSecureIT LLC (dba GM SECTEC)

360 Advanced, Inc.

7Security GmbH

BOTECH FRAUD PREVENTION & INTELLIGENCE SL.

BSI Group Japan K.K.

Baker Tilly Advisory Group, LP

Beijing Unionpay Card Technology Co. LTD

CGI Technologies and Solutions, Inc.

CYBERCUBE SERVICES PVT. LTD.

Claranet Limited

Compliance Control Ltd.

ControlCase, LLC

Convergent Network Solutions, Ltd

Crimson Security, Inc.

Crossbow Labs LLP

Crowe LLP

Deiteriy Company Ltd.

ESEC FORTE TECHNOLOGIES PRIVATE LIMITED

FIVE TATTVA CYBERHUB SECURITY LLP

Foregenix Ltd.

GRsee Consulting

GuidePoint Security, LLC

Hitachi Systems Security, Inc.

INSIGHT ASSURANCE LLC

Internet Security Auditors

K3DES, LLC

KYTE Consultants, Ltd.

MCI Communications, Inc. dba Verizon Business Services

MOLNIRCHECK LTD

MegaplanIT Holdings LLC

Musarubra US LLC

Neil Gonsalves & Associates LLC, dba AARC-360

Nettitude Ltd.

Network Intelligence Pvt. Ltd.

Panacea Infosec (P) Ltd.

Payment Software Company (PSC)

Prescient Security, LLC

Protiviti

QRC Assurance And Solutions Private Limited

RSM US LLP

Risk Associates Europe Ltd.

SISA

SRC Security Research & Consulting GmbH

Secure Vectors Information Technologies Inc.

Secured Net Solutions Inc.

Securisea, Inc.

SecurityMetrics, Inc.

Sovereign Secure Ltd.

Sysxnet Limited, dba Sysnet Global Solutions

Thales Cyber Services Australia Pty Ltd

TrustedSec, LLC

ValueMentor InfoSec Private Limited

VikingCloud, Inc.

Wolf & Company, P.C.

atsec (Beijing) Information Technology Co., Ltd

usd AG

1 SEQUENCE CYBER LIMITED

247 CyberLabs Limited

A2 Secure Technologias Informatica, Sociedad Ltd.

AWA International Group, LLC

Allcontrols OÜ