Enterprise SOC 2 Auditors

Assurance Dimensions is a Florida-based CPA audit firm founded in 2008 with leadership from former Arthur Andersen, Grant Thornton, BDO, and Schellman professionals. Their team includes a former Schellman Florida SOC practice leader. They specialize in SOC examinations for technology and financial services companies.

Auditwerx is a CRI (Carr, Riggs & Ingram) division dedicated exclusively to SOC reporting and compliance attestation. Founded in 2009, they have produced over 3,500 security compliance reports and 200+ reports annually. They specialize in SOC 1, SOC 2, SOC 2+, PCI DSS, and CMMC assessments.

Baker Tilly is a Global CPA and advisory firm with dedicated AICPA SOC specialists performing hundreds of SOC 2 engagements annually across a wide variety of industries.

BARR Advisory is a cloud-based cybersecurity and compliance firm specializing in SOC 2, ISO 27001, and FedRAMP for fast-growing SaaS and cloud-based organizations, with a net promoter score of 89.

BDO UK is a major accountancy and business advisory firm offering SOC 1, SOC 2, and ISAE 3402 assurance services from London. As part of the BDO global network spanning 160+ countries, they serve technology and financial services organisations requiring international attestation.

BDO is a large accounting and consulting firm that provides SOC 2 audits and other assurance services, offering a strong alternative to the Big Four with a growing technology audit practice.

British Assessment Bureau (part of Amtivo Group) is one of the UK's most popular UKAS-accredited certification bodies, offering ISO certification services for over 20 years. Amtivo Group has offices in the US, UK, Ireland, Italy, Norway, China, and Japan, serving clients in 40+ countries. Rebranding to Amtivo in 2026.

BSI (British Standards Institution) is an international standards and certification body headquartered in London, offering SOC 2 compliance services alongside ISO 27001, ISO 27017, and other information security certifications globally.

CBIZ is a leading provider of financial, insurance, and advisory services including SOC reporting and IT audit through its MHM subsidiary partnership.

Cherry Bekaert is a national CPA and advisory firm with 3,000+ professionals and 75+ years of experience. They offer SOC 1, SOC 2, SOC 2+, SOC 3, and SOC for Cybersecurity, and are an authorized CMMC C3PAO. Their Risk & Cybersecurity team has 30+ years of SOC and information assurance experience across all industries.

Citrin Cooperman is the 19th largest US CPA firm, with licensed attest services through Citrin Cooperman & Company, LLP. They operate a dedicated IT Audit Services practice. In 2025, Blackstone acquired a majority stake, valuing the firm at $2 billion, enabling continued investment in technology and talent.

CLA (CliftonLarsonAllen) is one of the largest US CPA and business advisory firms with 8,500+ professionals across nearly 130 US locations. They provide SOC 2 audit services with industry-focused expertise spanning technology, government, healthcare, and nonprofit sectors. CLA Global was co-founded in 2022.

Coalfire is a leading cybersecurity advisory firm founded in 2001, completing 3,000+ assessments annually through Coalfire Controls, its fully licensed CPA affiliate. With 20+ years of SOC assessment experience and offices in the US and UK, Coalfire partners with Vanta to deliver AI-powered compliance acceleration.

CohnReznick LLP is a top-20 national CPA firm with 5,000+ global employees and $1.12B in FY25 revenue. Their attest entity is PCAOB-registered and inspected. They offer SOC 1, SOC 2, and SOC 3 audits with professionals holding Advanced SOC for Service Organization Certification and Big Four firm backgrounds.

Control Logics, founded in 2008, provides risk management and audit consulting for 250+ organizations across North America, Europe, and Asia, covering SOX, SOC readiness, ISO certifications, and privacy compliance.

Crowe is a global accounting firm delivering tailored, risk-based SOC 2 audits using proprietary data analytics and AI tools to speed up evidence collection and testing for high-assurance attestations.

Deloitte is one of the Big Four accounting firms with a massive security and risk management practice, serving as a go-to for complex, global SOC 2 audits for the largest enterprises.

Deloitte India provides SOC 2 consulting and audit support as part of the Big Four global network, helping Indian and multinational companies prepare for external reviews and certifications with certified experts in risk management and compliance.

Eide Bailly LLP is a Top 25 national CPA firm with 3,500 employees across 50+ offices in 17 states, having surpassed $750M in revenue in 2025. They offer SOC audits through their Risk Advisory Services practice, with industry expertise spanning healthcare, banking, and government sectors.

EisnerAmper is a major U.S. CPA and advisory firm with 440+ partners and 4,500+ professionals. Their Assurance Technology and Control Services Group performs dozens of SOC examinations annually. Notably, an EisnerAmper partner chairs the AICPA SOC 2 Working Group.

EY (Ernst & Young) is a Big Four accounting firm offering technology risk assurance services including SOC 2 audits, frequently working with large enterprises across multiple industries.

Forvis Mazars UK is a leading audit, taxation, and advisory firm with 1,500+ professionals in London. Their Technology and Systems Assurance team delivers SOC 1, SOC 2, and ISAE 3402 assurance reports for financial services and technology organisations globally.

Forvis Mazars US, formed by the 2022 merger of BKD and Dixon Hughes Goodman, is among the largest U.S. public accounting firms with 7,000+ team members. As part of the Forvis Mazars Global network, they deliver assurance, tax, and consulting services across all 50 states and internationally.

Frazier & Deeter, founded in 1981, is a Top 50 U.S. accounting and advisory firm headquartered in Atlanta with offices in the US, UK, and India. Their Process, Risk & Governance practice delivers SOC attestation services and has seen substantial demand growth for SOC 2 engagements.

Glocert International Certifications (UK) Limited is an IAS-accredited global certification body providing accredited certification for ISO 27001, ISO 42001, ISO 9001, ISO 22301, ISO 27701, ISO 20000-1, ISO 14001, and more. Incorporated in the UK in 2020, with offices in Dubai, Coimbatore (India), Colombo (Sri Lanka), and Newark (USA).

Grant Thornton is a global audit and advisory firm offering end-to-end SOC 2 solutions, combining audit expertise with technology to deliver efficient readiness assessments and high-quality attestation reports.

Grant Thornton India helps mid-sized organisations prepare for SOC 2 audit reports with an organised and accessible approach. The firm provides readiness assessments and attestation services as part of the global Grant Thornton network.

Insight Assurance is a Tampa-based audit and cybersecurity firm founded by former Big Four professionals, offering SOC 2, ISO 27001, HITRUST, and other compliance audits with a 97% client retention rate.

INTERCERT Inc. is a multinational auditing company operating in 28+ countries, accredited by SCC (Canada) and UAF (United States) under IAF for ISO certification, and a registered CPA firm for SOC 2/SOC 1 services. INTERCERT and Sprinto have delivered 500+ successful audits together.

IS Partners (merged with AssurancePoint) is a globally recognized CPA firm specializing in IT compliance and cybersecurity assurance, SOC 2, ISO 27001, HITRUST, and PCI DSS services.

KirkpatrickPrice is a licensed CPA firm and PCAOB-registered auditor that has issued over 20,000 security compliance reports to more than 2,000 clients worldwide since its founding. They specialize exclusively in cybersecurity audits including SOC 1, SOC 2, PCI DSS, HITRUST CSF, and ISO 27001.

KPMG is a Big Four accounting firm with a strong IT attestation practice, offering SOC 2 audits as part of their broader assurance services with a global focus on risk management and compliance.

Lazarus Alliance is a licensed CPA firm and cybersecurity audit specialist providing SOC 1, SOC 2, and SOC 3 examinations, along with FedRAMP, CMMC, and HIPAA compliance services.

LBMC is Tennessee's #1 professional services firm with 1,000+ team members serving 11,000+ clients nationwide. Their SOC audit practice is led by professionals who have issued thousands of SOC reports, including a national AICPA SOC training leader. They offer SOC 1, SOC 2, SOC 3, and SOC for Cybersecurity.

Linford & Company is a Denver-based CPA firm comprised of former Big Four auditors specializing in SOC 2, HIPAA, FedRAMP, and HITRUST assessments. 90% of their work consists of SOC 2 audits.

Marcum LLP is a top-15 national CPA and advisory firm serving private and public companies. Their Risk Advisory practice specializes in SOC reporting, PCI DSS, HIPAA/HITRUST, FISMA, NIST, and ISO 27001, with staff holding CISA, CISSP, QSA, GPEN, and GWAPT certifications.

Mauldin & Jenkins is a regional CPA and advisory firm offering SOC examinations, IT audit, and cybersecurity compliance services across the Southeast.

Moss Adams, founded in 1913, is one of the 15 largest accounting and consulting firms in the United States. Following its 2025 combination with Baker Tilly, the firm operates as the nation's sixth largest CPA advisory firm with 11,000+ professionals across 100+ locations, offering SOC 2 and SOC 3 audit services.

Plante Moran is one of the nation's largest CPA and business advisory firms with nearly 4,000 staff. Their cybersecurity practice has over 30 years of SOC consulting experience and is actively involved with the AICPA SOC committees, providing advanced visibility into upcoming SOC reporting standards.

Prescient Assurance (formerly Prescient Security) is a globally recognized leader in multi-framework compliance auditing, security assessments, and penetration testing, with senior auditors across the U.S., EMEA, and APAC supporting 25+ compliance frameworks for 5,000+ clients.

PwC (PricewaterhouseCoopers) is a Big Four accounting firm known for a strong risk assurance practice, popular with large tech and financial services companies for SOC 2 and related compliance audits.

PwC India provides SOC 2 Type 2 compliance services, checking governance and internal controls to prepare companies for audits. Particularly useful for companies doing business across multiple countries, leveraging PwC's global network of 364,000+ professionals.

PYA (Pershing Yoakley & Associates) is a Top 100 CPA firm ranked by USA Today, Forbes, and INSIDE Public Accounting, and a Top 15 auditor of the nation's largest health systems. They provide SOC 2 Type I and Type II audits for SaaS and cloud-based companies, led by seasoned CPAs and CISAs who prioritize deep technical audit rigor.

RSM US is a leading CPA and consulting firm delivering end-to-end SOC 2 support from readiness to audit, with an integrated audit-consulting model and deep industry expertise for middle market companies.

RubinBrown LLP is a Top 35 national CPA firm and INSIDE Public Accounting Top 500 firm (#33). Their Information Technology Risk Services practice provides SOC 1, SOC 2, and SOC for Cybersecurity examinations with an 'audit once, report many' approach. They also offer an AI Health Check based on NIST AI RMF.

Schellman is a leading compliance assessment firm focused exclusively on attestation and cybersecurity services, including SOC 2, ISO 27001, HITRUST, FedRAMP, and PCI DSS.

Schellman's German office in Munich provides SOC 2, ISO 27001, and C5 attestation services for European organisations. Schellman is one of the few global compliance firms with a dedicated European presence enabling ISAE 3000/3402 and SOC examinations under both AICPA and international standards.

Schneider Downs is a Top-60 independent CPA firm and the 13th largest accounting firm in the Mid-Atlantic region. They blend IT, internal audit, and external audit expertise for SOC engagements and maintain a proprietary SOC 2 controls catalog. National speakers on SOC reporting and also offer SOC for Supply Chain.

Securance is a Netherlands-based assurance firm founded in 2004 with roots in Big Four, serving 800+ customers across the Netherlands, Germany, Sweden, and UK. They offer a 'Single Audit, Multiple Standards' approach covering SOC 1, SOC 2, ISAE 3402, ISO 27001, NIS2, and DORA.

Sikich is one of the largest US CPA firms with 2,000+ professionals across North America, EMEA, and APAC. Sikich CPA LLC, the licensed attest entity, provides SOC 2 audit services, while the broader firm offers cybersecurity, ERP/CRM, managed IT, and advisory services.

Smith + Howard is a CPA and advisory firm providing SOC reporting, IT audit, and risk advisory services with a focus on middle-market companies.

TUV Rheinland is a global testing, inspection, and certification company founded in 1872 in Cologne, Germany. The firm offers SOC 2 compliance services alongside ISO 27001, ISO 27017, and other security certifications across India, Europe, and globally.

UHY LLP is a national CPA firm and a member of UHY International providing SOC examination, IT risk advisory, and compliance audit services.

Weaver is a Top-35 US CPA firm headquartered in Texas offering SOC 1 and SOC 2 Type I and Type II examinations. Their IT advisory team is led by professionals including Neha Patel (CISA, CDPSE), a former AICPA national SOC School trainer named to Forbes' 2025 Best-in-State CPAs.

Windham Brannon is a full-service CPA firm founded in 1957, offering SOC 1, SOC 2, SOC 2+, and SOC 3 examinations along with SOC readiness assessments through its Risk Advisory practice.

Wipfli LLP is a licensed independent CPA firm operating in an alternative practice structure per AICPA standards. They offer SOC 1, SOC 2, SOC for Cybersecurity, and SOC for Supply Chain examinations. Their IT audit team includes SOC, HITRUST, digital forensics, and AI security specialists, including a noted practice for AI company compliance.

Withum is a forward-thinking advisory and accounting firm and one of the top CPA firms in the US. Their SOC audit team authored and presented the inaugural AICPA SOC for Cybersecurity course, and seven of their professionals are among the first CPAs nationwide to earn the AICPA's SOC for Cybersecurity digital badge.

Wolf & Company, P.C. is a national CPA and business consulting firm founded in 1911, with over 40 IT audit and security professionals. They offer SOC 1, SOC 2, SOC 3, and SOC for Cybersecurity examinations, holding CISA, CISSP, and CPA credentials across their team.