Mid-Market SOC 2 Auditors: Top Firms

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.

Alexander Thompson Arnold (ATA) is a regional CPA and advisory firm offering SOC examination, IT audit, and risk advisory services across the Mid-South.

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.

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.

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.

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.

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.

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.

YHB (Yount, Hyde & Barbour) is a Virginia-based CPA and consulting firm established in 1947 with SOC audit and IT audit services. Their Risk Advisory Services team includes CITPs and CISAs who focus on AICPA Trust Services Categories and ISACA COBIT frameworks, providing vulnerability assessments, penetration testing, and SOC auditing.

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.

Aprio, founded in 1952, is a Top 25 U.S. public accounting firm with 1,900+ team members serving clients in 50+ countries. Aprio is one of the few firms offering ISO, SOC reporting, HITRUST, PCI DSS, CMMC, FedRAMP, and WebTrust from a single provider.

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.

Armanino is a Top 20 U.S. CPA and consulting firm founded in 1953 with approximately 3,000 employees across 5 continents. Armanino CPA LLP is a licensed independent CPA firm offering SOC reporting and compliance services including SOC 1 and SOC 2 Type I and Type II reports.

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.

KLR (Kahn Litwin Renza) is a Top 100 U.S. CPA firm founded in 1975 with 350+ professionals. The firm provides SOC 2 audit services and is a confirmed Secureframe audit partner, with an international office in Lausanne, Switzerland.

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.

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.

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.

Oread Risk & Advisory helps clients create long-term compliance and security infrastructure based on unique business and compliance goals, listed as a trusted SOC 2 audit firm on the Secureframe directory.

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.

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

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.

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.

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.

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.

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.

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.

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

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.

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.

Henderson Loggie is a Scottish chartered accountancy firm providing SOC, SOX, and ISAE 3402 compliance services for UK and European technology organisations. The firm publishes practical compliance guides helping organisations understand SOC 2 and ISAE requirements.

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.

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.

BD Emerson offers specialized SOC 2 Type I and Type II audit services with a strategic partnership with Vanta and was among the first Vanta Certified implementation partners. The firm is a collaborating firm of Andersen Consulting.

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.

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.

iRisk Assurance is a fast-growing GRC and cybersecurity consulting firm headquartered in Chennai, India, with offices in Bangalore and the USA. Founded in 2014, the firm has completed 200+ successful SOC, ISO, and HIPAA audits. The team includes Big 4 veterans with CPA, CISA, CISSP, and CEH certifications, and operates an in-house SOC in Chennai.

Percilchofe CPA LLC is a licensed CPA firm and AICPA member with 15+ years of expertise in audit, assurance, and compliance. The India-headquartered firm (Percilchofe Pvt. Ltd.) has a US entity registered in Sheridan, WY, and specializes in SOC 1, SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS, HITRUST, FedRAMP, and CMMC.

Richey May provides attest services through Richey, May & Co., LLP, an AICPA-member CPA firm that undergoes triennial Peer Review and has received the highest attainable results. They specialize in SOC 1 and SOC 2 reports for alternative investment, mortgage banking, and technology firms, with Drata partnership for streamlined evidence collection.

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.

CompliancePoint Assurance is a licensed CPA firm dedicated exclusively to SOC 2 audits, led by Carol Amick, a CPA with 20+ years of information security experience. As a CompliancePoint division, they offer blended PCI DSS + SOC 2 and HITRUST + SOC 2 audits, leveraging their status as a PCI QSA and HITRUST-authorized CSF Assessor.

BerryDunn is the largest assurance, tax, and consulting firm headquartered in New England with nearly 1,000 employees across 7 states and Puerto Rico. Their attest services are provided by BDMP Assurance, LLP, a licensed CPA firm. They have successfully guided MSPs and technology firms through SOC 2 examinations to meet enterprise vendor requirements.

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.

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.

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.

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.

Audit Peak is a minority-owned CPA firm specializing in IT audits, cybersecurity, and risk advisory services. Founded by former PwC, EY, and KPMG professionals, the firm delivers Big 4-level audit expertise with boutique agility. AICPA Peer Review rated 'Pass' (highest rating).

Clark Nuber PS is the largest locally-owned CPA firm in the Pacific Northwest with 300+ professionals and a Certified B Corporation. Their Technology Group serves SaaS, blockchain, AI, and AR/VR companies, providing SOC 1 and SOC 2 reports on controls, with experience including Microsoft SSPA attestations.

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.

ITGRC Advisory Ltd is a UK-based firm delivering ISAE 3402 and SOC 2 audit services to technology and financial services organisations. Operating from London, they specialise in helping UK and European companies meet AICPA Trust Services Criteria and ISAE 3000/3402 standards.

GRSee Consulting, founded in 2009, is an Israel-based cybersecurity and compliance firm with offices in NYC and San Francisco. GRSee provides SOC 2, ISO 27001, PCI DSS, HIPAA compliance services and penetration testing, and is a confirmed Secureframe audit partner.

360 Advanced provides cybersecurity assessments, risk management, and SOC 2 audit services for organizations in healthcare, finance, and government sectors requiring cybersecurity and compliance measures.

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.

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.

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.

Astra Security is an Indian cybersecurity company offering SOC 2 audit services, penetration testing, and vulnerability assessment. They partner with CPA firms to deliver end-to-end SOC 2 Type I and Type II compliance, combining automated scanning with manual expert review.

Windes is a Southern California CPA firm founded in 1926 with 30 partners and 250+ professionals across Long Beach, Orange County, and Los Angeles offices. Recognized as an Accounting Today Top 100 Firm, they offer audit, assurance, cybersecurity risk management, and technology advisory services to technology companies and nonprofits.

VISTA InfoSec, founded in 2004, is an international information security consulting firm with offices in the US, UK, Singapore, and India. The firm has an independent CPA department for SOC 2, GDPR, HIPAA, and PCI DSS attestation services. Recognized as Deloitte Technology Fast 500 Asia Pacific.

Sensiba (formerly Sensiba San Filippo) is a Top 75 U.S. CPA firm offering SOC 2, ISO 27001, and other compliance audits. Sensiba acquired Australia-based AssuranceLab in 2025, expanding its global GRC capabilities with 90+ experts and 2,000+ successful audits.

Sentry Assurance is a CPA firm founded by former Big Four auditors (PwC, Deloitte, EY) specializing in SOC 2 audits with a process built from the ground up for compliance automation tools like Drata.

HoganTaylor is one of the largest business advisory and CPA firms in Oklahoma and Arkansas with 350+ personnel. Their Risk Assurance team specializes in SOC reports, HITRUST validated assessments, and CMMC certification for small to medium-sized companies across the US, delivering highly customized SOC audits.

Maxwell Locke & Ritter (ML&R) is the largest locally-owned CPA firm in Central Texas, founded in 1991 with 140 team members. They perform SOC readiness assessments and SOC 2 examinations for SaaS, FinTech, HealthTech, EdTech, and AI companies, and are recognized as Accounting Today's #1 Best Mid-sized Accounting Firm to Work For.

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

ISECURION is a Bangalore-based cybersecurity firm providing SOC 2 Type I and Type II compliance audit services. The firm specialises in SOC 2 certification for Indian and global SaaS companies, with additional capabilities in ISO 27001, PCI DSS, and HIPAA 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.

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.

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.

Illume Intelligence is an Indian cybersecurity consulting firm providing SOC 2 assessment services across Delhi, Mumbai, Bangalore, and Chennai. The firm delivers end-to-end SOC 1 and SOC 2 compliance services for technology and financial services organisations.

Anders CPAs + Advisors is a St. Louis-based CPA firm founded in 1965, providing SOC 1, SOC 2, SOC 2+, and SOC for Cybersecurity audit and advisory services. Their team determines the ideal SOC report type for clients' contractual and regulatory needs. Anders Technology also offers managed IT and vCISO services.

AssuranceLab (now part of Sensiba LLP) is an Australia-headquartered cybersecurity audit and risk assurance firm specializing in SOC 2 and ISO 27001 for technology and SaaS companies, with offices in Sydney, Austin TX, and Dublin.

Kratikal is an Indian cybersecurity firm offering SOC 2 compliance services with auditors well-versed in international IT frameworks. They deliver optimised solutions for SOC 2, ISO 27001, PCI DSS, HIPAA, and GDPR tailored to each organisation's needs.

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).

Securis360 is a cybersecurity and compliance consulting firm offering SOC 2 readiness, cloud security testing, penetration testing, and staff augmentation services. Founded by former Big Four professionals, the firm takes a three-phase approach to SOC 2 (readiness assessment, remediation, attestation support) covering all five Trust Services Criteria. Securis360 also provides cloud security assessments across AWS, Azure, and GCP, along with penetration testing as a service (PTaaS) and compliance support for ISO 27001, HIPAA, HITRUST-CSF, and GDPR. They are not a CPA firm and do not issue SOC 2 attestation reports directly.

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

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.

Compass IT Compliance provides SOC examination, IT audit, and cybersecurity compliance services to organizations across the United States.

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.

Copeland Buhl is a full-service CPA firm offering SOC 1, SOC 2 Type I, SOC 2 Type II, SOC 3, and SOC 2 + HITRUST mapping audits alongside tax and advisory services.

Keiter is a Virginia-based CPA firm offering SOC 1 and SOC 2 examinations through their Risk Advisory Services team. Their practice lead, Scott McAuliffe (CISA, CFE), has 25+ years in public accounting, including Sarbanes-Oxley, internal audit, and CMMC work. They also offer IT audit via Keiter Technologies.

NDNB Accountants & Consultants has been a national provider of SOC compliance and assessment services since 2006. The firm specialises in SOC 1, SOC 2, HIPAA, GLBA, and PCI DSS audits, efficiently combining overlapping operational and security controls across frameworks.

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.

Thomas Howell Ferguson (THF) is a CPA firm offering SOC examination and IT audit services, with deep expertise in government and nonprofit compliance.

Thoropass (formerly Laika) is an integrated compliance management platform and certified audit firm offering SOC 2, ISO 27001, HIPAA, HITRUST, and PCI DSS with in-house auditors.

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.

A-LIGN is a technology-enabled cybersecurity compliance firm and the number one global issuer of SOC 2 reports, having completed over 16,000 audits since its founding in 2009.

Johanson Group is a Colorado-based CPA firm specializing in SOC 1, SOC 2, SOC 3, ISO 27001, and HIPAA audits with a three-step process and reports delivered within four to six weeks.

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.

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.

Airius LLC provides risk management, compliance, and regulatory services with 20+ years of experience. Listed on Vanta's partner directory, the firm helps organisations achieve and maintain SOC 2, ISO 27001, and other compliance certifications.

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.

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.

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

Boulay Group is a Minneapolis-based CPA firm founded in 1934, offering SOC 1, SOC 2, SOC 3, and SOC for Supply Chain reporting services alongside financial advisory services.

Riskpro India is a Mumbai-based risk and compliance consulting firm with in-house US CPA certified professionals, having completed 1,400+ SOC audits. The team includes former Ernst & Young and Navigant Consulting professionals specialising in SOC 1, SOC 2, HIPAA, PCI DSS, and GDPR.