SOC 2 auditors for government contractors: 64 firms for federal overlap.

Best for · B2B SaaS startups (Series A through growth stage) using Drata, Vanta, or Secureframe and prioritizing speed without sacrificing thoroughness. AI/ML and LLM companies needing SOC 2 + ISO 42001 together — Prescient audits leading AI and large language model providers. Fintech, healthtech, and security vendors at scale. CSPs pursuing FedRAMP authorization. DoD contractors needing a full C3PAO (newly authorized March 2026). Teams already using Slack who want same-day audit communication.

Differentiator · One of the largest SOC 2 auditors globally for SaaS (fintech, healthtech, security) and AI companies — including major LLM providers — running 5,000+ audits a year across all standards. Cybersecurity-first DNA: founded by CREST-certified penetration testers, not traditional accountants. Run from a Nashville HQ with a distributed team of 200+ across the US, EMEA, and APAC and a same-day Slack/Teams response guarantee. SOC 2 engagements start at $10K with report delivery in 4-6 weeks once fieldwork begins. Authorized CMMC C3PAO as of March 2026 (joining FedRAMP 3PAO, PCI QSA, HITRUST, and ANAB ISO accreditation for 27001/27701/42001). The Cacilian PTaaS platform and CAIT (Continuous AI Tester) bring AI-driven offensive security into the audit workflow. A Top 20 CREST and CSA STAR organization globally, operating under Prescient Security Management LLC as an AICPA alternative practice structure.

Best for · Mid-market to enterprise companies that need multiple compliance frameworks (SOC 2 + ISO 27001 + HITRUST + FedRAMP + PCI) under one roof. CSPs pursuing FedRAMP authorization. Companies that want a top-three FedRAMP 3PAO and #1 SOC 2 issuer on the cover of the report.

Differentiator · #1 issuer of SOC 2 reports in the world with 5,700+ clients and 31,000+ audits completed. Top-three FedRAMP 3PAO; CMMC C3PAO authorized. A-SCEND platform was the first audit-management platform from a top-3 3PAO to achieve FedRAMP 20x Low authorization (Sept 2025), now augmented with EvidenceIQ AI evidence scoring and Cross-Service framework reuse. Acquired by Hg in July 2025 at a $1B+ valuation, accelerating European expansion and AI investment. CEO Scott Price (founder, 2009); Steve Simmons elevated to President in January 2026.

Best for · Healthcare and PE-backed mid-market organizations needing SOC reports plus parallel HITRUST, ISO 27001, PCI DSS, NIST, or CMMC assessments under one roof

Differentiator · Top-50 US accounting firm with an integrated cybersecurity practice covering SOC 1/2/3, HITRUST (one of the nation's leading HITRUST assessors), ISO 27001, NIST 800-171/53, PCI DSS, CMMC, and HIPAA — supported by 1,000+ professionals across 7 US offices plus a Chennai delivery team

Best for · Early-stage to mid-market SaaS and cloud-native companies needing SOC 1, SOC 2, or SOC 3 reports with hands-on partner involvement

Differentiator · Both partners are KPMG-trained: Jordan Novak (Managing Partner) brings Big Four IT audit plus in-house SOC ownership experience, and Tasya Novak (IT Audit Director, CISA) brings 13+ years of KPMG IT audit. Together they have 30+ years of combined IT audit experience across government, private, and public companies. Every engagement is partner-led from planning through delivery — no junior handoffs, direct communication, and a SharePoint-based client hub to keep evidence collection organized.

Best for · Defense contractors needing CMMC + FedRAMP, federal agencies requiring top-tier FedRAMP 3PAO, classified systems operators (ONLY auditor with DoD Facility Security Clearance), healthcare organizations needing HITRUST + SOC 2 bundles, companies wanting Top 50 CPA brand with multi-framework expertise

Differentiator · #1 FedRAMP 3PAO globally with unmatched government/defense expertise. ONLY audit firm with DoD Facility Security Clearance for classified assessments (unassailable competitive moat). Top 50 CPA firm issuing 1,000+ SOC reports annually. 'The Power of One' cross-compliance: SOC + ISO + FedRAMP + HITRUST + PCI + CMMC under single roof. Founded 2002, 20+ years compliance focus

Best for · Cloud-native SaaS, IaaS, and PaaS companies (high-growth startups through Fortune 1000 enterprises) needing multi-framework attestation (SOC 2 + ISO 27001 + HITRUST + PCI DSS) in a single coordinated engagement. Healthcare technology pursuing HITRUST. Y Combinator-style SaaS startups already running Vanta who want a Vanta MSP partner that can attest. Companies that want boutique-feel partner attention with global-consulting-firm methodology.

Differentiator · One of a handful of US firms eligible to audit against the four highest-regarded frameworks under one roof: ISO 27001, SOC 2, HITRUST, and PCI DSS. Branded 'Coordinated Audit' approach maps evidence once across multiple frameworks. 'No surprises' promise published on the readiness-assessment page: clear scoping, no last-minute findings. Cloud-native methodology built specifically for AWS/Azure/GCP. Big 4 alumni team operating remote-first since founding (2014). Vanta Managed Service Provider; uses taskBARR audit-management platform plus Audora partnership for 30% efficiency gains. Cameron Kline elevated to VP, Attest Practice Leader (January 2026). Multiple Best Companies to Work For awards (Ingram's 2024; KCBJ Fastest-Growing Tech 2025).

Best for · Middle-market companies needing consolidated compliance across multiple frameworks — SOC 2 + PCI + HIPAA + HITRUST, or CMMC + FedRAMP + ISO — under a single engagement team. Companies handling sensitive data facing multi-standard audit burdens who want one firm to streamline and de-duplicate evidence collection. Government contractors requiring CMMC/FedRAMP readiness alongside SOC 2. Healthcare and higher-education organizations pursuing HITRUST certification (FD's HITRUST practice leader has managed 300+ assessments). Companies with international operations needing dual AICPA/ISAE reporting. Growth companies that value a firm investing aggressively in scale, talent and technology.

Differentiator · FD's SOC Practice is led by competent Peer Reviewers along with a co-author of the AICPA's official SOC for Service Organizations curriculum — making FD one of the only firms where the person who literally wrote the AICPA's SOC playbook leads client engagements. FD sits on multiple HITRUST councils, giving FD arguably the deepest HITRUST bench in the country. Backed by General Atlantic (2025), FD's signature approach consolidates SOC 2, PCI, HIPAA, and HITRUST into a single evidence-collection cycle — eliminating duplicate audit burden.

Best for · Enterprise IT Outsourcing Services, Managed Security, Customer Support, Healthcare Claims Management & Processing, and FinTech Services

Differentiator · Integrated compliance approach with strategic guidance; SOC 2+ hybrid assessments combining multiple frameworks (HIPAA, HITRUST, CSA STAR); established relationships with client continuity

Best for · Nonprofit organizations, commercial companies, and wealthy individuals/estates seeking SOC 2 and LADMF certification

Differentiator · ACAB certification with extensive LADMF experience; PrimeGlobal member with global reach; 10% of net profits donated annually to nonprofits

Best for · SaaS, FinTech, HealthTech, e-commerce, regulated industries, enterprises to fast-growing startups

Differentiator · CPA-led firm with AICPA standards, end-to-end support from readiness to attestation, global presence with local regulatory expertise, automation-driven compliance execution

Best for · Mid-market and private companies — particularly in technology, real estate, government contracting, renewable energy, and South Florida — needing SOC 1/2/3 examinations from a Top 20 US CPA firm with dedicated IT Assurance practice.

Differentiator · Top 20 US CPA firm (~5,000 employees, 350+ partners, 29 offices, $1.12B FY25 revenue). Kelly O'Callaghan, the former IT Audit practice leader, became CEO of CohnReznick LLP (the attest CPA firm) following the February 2025 Apax Funds growth investment, which split the firm into CohnReznick LLP (attest) and CohnReznick Advisory LLC (non-attest, led by David Kessler). SOC practice led by Remi Franklin (IT Audit Partner). Strong South Florida footprint absorbed from the 2023 Daszkal Bolton merger (Boca Raton, Fort Lauderdale, Jupiter; AICPA Advanced SOC Certified auditors).

Best for · Enterprises needing compliance across 60+ frameworks through a single consolidated audit; organizations managing multiple annual compliance programs

Differentiator · Compliance as a Service (CaaS) pioneer; One Audit™ satisfies PCI DSS, ISO 27001, GDPR, HIPAA, SOC 2, and NIST 800-53 simultaneously; continuous compliance monitoring year-round; supports 60+ frameworks globally; proprietary ComplianceHub self-assessment platform

Best for · Mid-market through enterprise companies needing multi-framework coverage (SOC 2 + FedRAMP, SOC 2 + PCI, SOC 2 + HITRUST). Cloud service providers pursuing FedRAMP authorization (Coalfire is a top-three 3PAO with 121+ FedRAMP assessments). Payment processors needing PCI DSS at Level 1 scale. Healthcare SaaS pursuing HITRUST + HIPAA. DoD contractors needing CMMC Level 2 via Coalfire Federal (operationally independent C3PAO entity).

Differentiator · One of the world's largest specialist compliance assessors, with 1,000+ team members, 1M+ assessment hours, and 600+ framework experts. Top-three FedRAMP 3PAO. 75% of SOC engagements serve cloud service providers (Google, Amazon, IBM, Microsoft trust Coalfire). 500+ SOC reports issued annually. Owned by Apax Partners since 2020. Coalfire Federal runs as an independent C3PAO entity (DIBCAC CMMC Level 2 re-certified with perfect score, July 2025). Brad Little became CEO January 2026 (ex-Google Cloud, ex-Capgemini), replacing 20-year CEO Tom McAndrew. Compliance Essentials platform launched MCP-compatible Audit AI in 2025-2026.

Best for · Large Canadian organizations

Differentiator · Big Four firm with global presence and comprehensive cybersecurity services

Best for · Canadian financial services and large organizations

Differentiator · Big Four with strong risk management focus

Best for · Canadian enterprises and regulated industries

Differentiator · Big Four with industry-specific expertise and technology-driven approach

Best for · Large Australian enterprises

Differentiator · Big Four firm with global presence and Australian expertise

Best for · Mid-market to enterprise organizations across regulated industries seeking comprehensive SOC 2, ISO 27001, HITRUST, and CMMC compliance

Differentiator · Founded in 2005 by Big 4 alumni; acquired by Axiom GRC in November 2025 and merged with AssurancePoint in 2026, expanding SOC and ISO audit capacity; integrated compliance, cybersecurity, and risk-advisory services with strong client and employee retention

Best for · Australian financial services firms

Differentiator · Big Four with strong risk management focus

Best for · Australian enterprises and government

Differentiator · Big Four with industry-specific Australian expertise

Best for · Large enterprises and public companies with complex environments

Differentiator · Big Four brand recognition, global delivery capabilities

Best for · Global enterprises needing SOC 1/2/3, ISAE 3402, ISAE 3000, or DORA compliance from an internationally recognized, independent assurance provider

Differentiator · Globally recognized standards body founded in 1901; operates in 60+ countries; combines SOC attestation with ISO certification expertise under one roof; supports DORA compliance for EU financial services; trusted by multinational clients worldwide

Best for · Regulated industries and companies with international operations

Differentiator · Strong financial services expertise and regulatory knowledge

Best for · Modern SaaS, FinTech, Healthcare, and AI companies wanting a tech-enabled, lean audit process

Differentiator · Boutique CPA firm built from Big 4 (EY) IT-audit DNA; applies lean-manufacturing principles and AI/tech enablement to SOC engagements; explicitly platform-agnostic (no exclusive GRC partnership); offers SOC 1/2/3, HIPAA, GDPR, ISO 27001/27701/42001, CMMC, and AI assurance

Best for · SaaS companies, technology-driven enterprises, and compliance-focused organizations needing independent assessment across SOC 2, ISO 27001, ISO 42001, CSA STAR, C5, CMMC, FedRAMP 20X, NIST, privacy, AI governance, or penetration testing

Differentiator · Consilium Labs supports SOC 2 audit engagements with a structured, evidence based approach focused on professionalism, clear execution, reliable delivery, and a modernized client experience. Published security-scope SOC 2 pricing: Type 1 from $6,750 to $13,500, Type 2 from $9,600 to $16,300, Type 1+2 from $12,200 to $19,800, with additional Trust Service Criteria at $1,300 each

Best for · Small and mid-sized domestic and international companies needing SOC 1/2/3, ISO 27001, PCI DSS, HITRUST, and HIPAA compliance

Differentiator · PCAOB registered firm headquartered in Atlanta with global presence across North America, Europe, and Asia; NMSDC certified; complete 360° circle of assurance, advisory, risk, and compliance services; serves clients across all 5 main continents

Best for · Companies needing Big 4-quality SOC 1/2, HIPAA, GLBA, GDPR, FISMA, or NIST audits at boutique prices; diversity-forward organizations

Differentiator · Minority-owned CPA firm founded by former PwC, EY, and KPMG professionals; AICPA Peer Review 'Pass' rating; no sales culture — success driven by team excellence; cloud-centric approach for AWS, Azure, and GCP; deep commitment to diversity and inclusion in cybersecurity

Best for · Companies needing SOC 2, PCI DSS, HIPAA, CMMC, or privacy compliance wanting large-firm resources with specialized boutique attention

Differentiator · Division of Carr, Riggs & Ingram (CRI), a top-25 national CPA firm — large-firm resources with specialized boutique service; experienced QSA team for PCI DSS; dedicated SOC readiness program minimizing audit delays; secure Auditwerx Dashboard for evidence uploads

Best for · Nonprofit organizations and government contractors

Differentiator · 45+ years of nonprofit accounting expertise with 1,600+ nonprofit clients; on-site audit services; global network through CPAmerica and Crowe Global

Best for · Fortune 500 companies and regulated organizations in financial services, government, higher education, and enterprise sectors seeking SOC 2 compliance

Differentiator · Human-centered approach emphasizing that no tool can replace human judgment. Integrated framework covering people, process, and technology with strong security awareness training focus

Best for · Regulated industries in New England seeking SOC 2 compliance with integrated IT infrastructure support

Differentiator · SOC 2-focused practice with 25+ years serving Boston enterprises; deep expertise in Microsoft 365/Azure and compliance-heavy regulated sectors

Best for · Mid-Atlantic not-for-profits, automotive dealerships, and construction/real estate firms.

Differentiator · 100+ year regional heritage with deep specialization in automotive dealerships, construction, and nonprofits.

Best for · Mid-market SaaS, consulting, and government contractors seeking hands-on SOC 2 guidance with deep industry expertise.

Differentiator · CPA firm combining licensed CPAs with cybersecurity professionals, offering industry-specific SOC 2 expertise and practical business value beyond compliance.

Best for · Southeast US companies and government contractors

Differentiator · Top 25 firm with Auditwerx division for SOC audits, CMMC expertise

Best for · Cloud service providers pursuing FedRAMP combined with SOC 2; DoD contractors needing CMMC; organizations consolidating multiple annual compliance programs

Differentiator · FedRAMP 3PAO with 77+ assessments including FedRAMP High; proprietary XRAMP framework consolidates 6-11 annual authorizations into one continuous workstream; expert at combining FedRAMP + SOC 2 to reuse evidence; acquired Kovr.AI for AI-enhanced compliance; GovRAMP and StateRAMP authorized

Best for · Government contractors and cloud service providers needing specialized FedRAMP, CMMC, and SOC 2 compliance audits with expert advisory.

Differentiator · FedRAMP 3PAO and CMMC C3PAO assessor with proprietary IT Audit Machine platform and AI-enhanced Cybervisor advisory spanning 26+ years.

Best for · Organizations prioritizing hands-on remediation support and rapid compliance certification across multiple frameworks.

Differentiator · AICPA-licensed specialist offering hands-on remediation alongside auditing, with 100% documented client retention.

Best for · Mid-market financial institutions and professional services firms needing SOC 2 and IT audit expertise.

Differentiator · 79-year heritage with specialized financial institutions audit team and integrated tax/advisory services.

Best for · SaaS platforms and fintech companies scaling globally with independent CPA-led SOC 2 and FedRAMP compliance.

Differentiator · CPA firm integrating penetration testing and vulnerability assessment with SOC 2 audits for comprehensive security readiness.

Best for · Mid-to-large enterprises and SaaS platforms needing SOC 2, PCI, ISO 27001 audits with integrated managed security.

Differentiator · Integrates SOC 2/PCI/ISO audits with managed security and threat detection via proprietary TrustNavigator™ platform.

Best for · Government agencies and nonprofits requiring comprehensive compliance audits in the Western US.

Differentiator · Deep expertise in GAO Yellow Book audits with Big 4-trained leadership.

Best for · SaaS startups and tech companies needing fast-tracked SOC 2 and ISO 27001 compliance.

Differentiator · Vanta-certified implementation partners combining CPA audit expertise with embedded consulting for rapid compliance deployments.

Best for · Mid-market and nonprofit organizations requiring comprehensive accounting, audit, and assurance services.

Differentiator · Established B Corp-certified CPA firm with 70+ years of experience across diverse industries.

Best for · Multistate businesses needing comprehensive accounting, tax, advisory, HR, and risk management services from an established CPA firm.

Differentiator · Broad-service CPA firm combining tax, assurance, and advisory with dedicated HR consulting and risk management divisions.

Best for · Mid-market businesses across Southeast U.S. seeking comprehensive accounting, tax, and industry-specific advisory services.

Differentiator · Nationally ranked Top 150 firm with 25+ partners delivering assurance, data security, and industry expertise across multi-state Southeast region.

Best for · Mid-market and enterprise companies across healthcare, financial services, and technology seeking comprehensive assurance, tax, and consulting.

Differentiator · Ranked #33 on IPA Top 500 with 1,000+ professionals and member of Baker Tilly International, the 9th largest global accounting network.

Best for · Mid-market to enterprise companies across manufacturing, construction, healthcare, and financial services in the Southeast seeking integrated audit and attestation services.

Differentiator · PCAOB-registered Top 50 U.S. CPA firm with 750+ professionals providing SOC 2 attestations alongside comprehensive tax and advisory services.

Best for · Middle-market businesses seeking comprehensive audit, tax, and advisory services from a nationally ranked CPA firm.

Differentiator · Ranked #1 fastest-growing by Accounting Today with 3,000+ professionals delivering middle-market expertise across audit, tax, and advisory services.

Best for · Mid-market to enterprise companies across multiple industries seeking comprehensive SOC 2 and cybersecurity compliance services.

Differentiator · Vault-ranked top-10 national firm with authorized CMMC assessment capabilities and integrated cybersecurity advisory services.

Best for · Large enterprises and mid-market companies needing comprehensive SOC 2 audits with deep industry-specific expertise across multiple sectors.

Differentiator · 35-year employee-owned firm ranked #75 nationally, serving 143 Fortune 500 companies with 83% client renewal rate.

Best for · Mid-market and enterprise organizations across diverse industries seeking integrated assurance, tax, and advisory services.

Differentiator · Top 10 global professional services network with $6.8B combined income and specialized expertise across 12+ industries.

Best for · Mid-market to enterprise clients across healthcare, technology, and financial services seeking audit and advisory from a large, employee-owned national firm.

Differentiator · Employee-owned firm ranked 42nd largest in the US with 800+ CPAs and specialists across IT controls, healthcare consulting, and SOC reporting.

Best for · Mid-market companies and nonprofits across the Southeast seeking comprehensive assurance and tax services.

Differentiator · Top 100 accounting firm with 100+ years of experience serving diverse industries across the Southeast.

Best for · Mid-market to large enterprises needing comprehensive audit and tax services across multiple industries with a focus on energy, financial services, and healthcare.

Differentiator · Largest independent CPA firm in the Southwest with national reach, ranked #28 among top 100 US accounting firms, emphasizing industry-specific expertise and customized client relationships.

Best for · Large enterprises and complex organizations requiring full-service accounting, audit, tax, and advisory support.

Differentiator · Top 20 national CPA firm offering integrated SOC, audit, tax, and advisory services across major U.S. markets.

Best for · Large enterprises and public companies requiring comprehensive audit, assurance, tax, and advisory services across diverse industries.

Differentiator · National CPA firm with 475+ partners providing integrated assurance, tax, advisory, and outsourcing services with deep industry expertise.

Best for · Mid-market organizations in healthcare, financial services, and government sectors requiring comprehensive assurance and audit services.

Differentiator · 50-year heritage with industry-embedded professionals who bring direct experience from the sectors they serve, delivering specialized audit expertise.

Best for · Mid-market and rapidly growing companies across construction, manufacturing, healthcare, financial services, and government.

Differentiator · Top 20 CPA firm balancing national strength with local mindset, delivering 100+ years of mid-market expertise across 17 industries.

Best for · Multi-industry organizations seeking comprehensive audit, tax, and advisory services with expertise across technology, healthcare, and financial services.

Differentiator · 60+ year legacy with 450+ professionals across California, the South, Southwest, and Pacific Rim; ranked Top 100 CPA firm.

Best for · Large enterprises across multiple industries requiring comprehensive audit, tax, and advisory services.

Differentiator · 100+ year heritage with people-first culture and integrated audit, tax, consulting, and wealth management capabilities.

Best for · Mid-market to large organizations across financial services, healthcare, and manufacturing seeking experienced multi-service audit and advisory partners.

Differentiator · 10-year Best of Accounting Diamond Award winner with 80+ years of audit and assurance expertise across seven industries.

Best for · Growing middle-market organizations seeking integrated CPA, audit, and advisory services with deep industry-specific expertise.

Differentiator · 3,000+ professionals delivering integrated solutions across 13+ industries with particular strength in financial services, healthcare, and construction.

Best for · UK and international mid-market and enterprise clients needing Service Organisation Controls reports across ISAE 3402/3000, AICPA SOC 1/2/3, and AAF standards from a top-tier UK CPA firm.

Differentiator · UK arm of the Grant Thornton International network (listed on Drata's Audit Alliance as Grant Thornton UK Advisory & Tax LLP). ~5,100 UK professionals and 212 partners across London (HQ), Manchester, Birmingham, Aberdeen, Chelmsford, and Ipswich; dedicated SOC team delivers global SAR reporting with embedded cyber, data privacy, and operational resilience SMEs.

Best for · Large enterprises and multinational organizations requiring Big Four audit credentials and global compliance reach.

Differentiator · Big Four member firm with global network, multi-service offerings, and access to international audit methodologies.