Firms That Do Both SOC 2 and ISO 27001: 47 firms compared

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 · Mid-market tech companies ($10M-$500M revenue) prioritizing speed and technology integration. Private equity-backed companies needing bundled audit, tax, and compliance services. Bay Area & West Coast startups wanting local presence and tech industry fluency. Companies expanding internationally requiring both SOC 2 and ISO 27001/27701. Organizations valuing efficiency over brand prestige alone

Differentiator · Top 20 U.S. accounting firm with 2,000+ employees and 50+ years experience (founded 1969). Audit Ally AI-powered platform (launched Jan 2024) - purpose-built by accountants for auditors with centralized dashboard, AI-powered automation, embedded communication, and AI summarization of audit notes. ANAB-accredited ISO certification body (can issue ISO certificates, not just attest - extremely rare among CPA firms). Integrated audit + tax + consulting + ISO certification under one roof eliminates vendor management overhead. Strong Bay Area presence with deep Silicon Valley expertise and VC relationships

Best for · Companies that want a long-term audit relationship over a transactional, checkbox engagement — and need a firm that can start immediately and cover SOC 2 alongside ISO 27001, ISO 42001, NIST, or HITRUST without bringing in a second vendor.

Differentiator · Independent, employee-owned CPA firm headquartered in Cincinnati (founded 1965, 225 staff) with roughly 20 people working exclusively on SOC reports. Readiness, audit, and issuance are handled entirely in-house with no outsourcing, by a team distributed across six time zones that serves two-person startups through large multinationals. SOC engagements are priced as a fixed fee rather than billed hourly, so the number is known before fieldwork begins, and the firm holds strong AICPA Peer Review standing. Multi-framework coverage (SOC 2, ISO 27001, ISO 42001, NIST, HITRUST, AI systems compliance) consolidates parallel attestations into one report, with a quality-and-relationship orientation rather than checkbox auditing. Notably fast: able to start engagements immediately, where most peers have multi-month lead times.

Best for · First-time SOC 2 buyers. Pre-Series A through Series B SaaS startups already running Drata, Vanta, Secureframe, or Rippling who want a fixed-fee, 4-to-6-week audit from an accredited CPA firm that also issues ISO 27001 certifications, HIPAA assessments, and PCI DSS reports under one roof. Founders who prioritize speed and price transparency over a brand-name auditor.

Differentiator · Boutique CPA firm with deep startup focus. Quoted 4-6 week turnaround on SOC 2 reports (top quartile for the market), fixed-fee engagements, flexible payment terms. IAS-accredited ISO 27001 certification body (MSCB-314, updated for ISO/IEC 27006-1:2024 in April 2026). Issues real ISO certificates rather than just attestations. Multi-framework one-stop shop: SOC 1/2/3, ISO 27001/27017/27018/27701, HIPAA, PCI DSS, GDPR, NIST, BSI C5. One of the launch-cohort independent audit firms partnered with Rippling Automated Compliance (announced April 2026). Drata Alliance Member with Code of Ethics Pledge; uses Drata internally to run audits even when clients aren't on it. Distributed/global remote team across multiple time zones, English + Spanish.

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 · 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 · VC-backed SaaS startups and Bay Area tech companies needing SOC 2 to unlock enterprise sales in 4-8 months. Cloud-native companies already using Drata, Vanta, Secureframe, or Sprinto. Companies combining SOC 2 + ISO 27001 (or SOC 2 + ISO 42001 for AI governance) in a single engagement. APAC-connected companies needing Essential 8, CDR, or GS 007 alongside US compliance. ESG-aware organizations that value B Corp status in their vendor chain.

Differentiator · Top 75 US CPA firm (Inside Public Accounting 2025) with deepest Bay Area VC ecosystem footprint among regional firms. Certified B Corporation (rare among CPA firms). Fixed-fee SOC 2 pricing marketed at 25-30% below comparable competitors. ANAB-accredited certification body for ISO 27001, 27701, 27017, 27018, AND ISO 42001 (AI management, issued directly, not via partner). April 2025 acquisition of AssuranceLab added 2,300+ combined clients across Americas/APAC/EMEA, making Sensiba one of the top three issuers of technology audit reports worldwide. PolicyTree auto-generates 21 mapped policies free for clients (also on AWS Marketplace). Managing Partner transition in May 2026: Monic Ramirez takes the role from John Sensiba (who continues as senior partner). Six new partners added May 2025 (largest single-year expansion in firm history).

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 · Silicon Valley startups, VC-backed companies, and tech firms needing SOC and ISO 27001 on AWS, GCP, Azure, or Salesforce; companies wanting both SOC and ISO from one ANAB-accredited firm

Differentiator · 75+ years deeply embedded in the Silicon Valley tech and VC ecosystem; ANAB-accredited ISO 27001/27701 certification body; can certify both SOC and ISO in-house; unlimited partner access year-round; deep expertise in biotech, life sciences, and fintech alongside core SaaS

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 to enterprise companies, organizations requiring multiple locations/subsidiaries, companies needing Big Four quality without Big Four pricing

Differentiator · 7th-largest US accounting firm created from CBIZ acquisition of Marcum (Nov 2024) with combined $2.8B revenue and 10,000+ employees across 160+ locations. Risk Advisory practice with staff holding CISA/CISSP/QSA/GPEN/GWAPT certifications, extensive SOC 1/2/3 experience, CSA STAR certified auditor. CBIZ provides finance, advisory, insurance services; attest work handled by Mayer Hoffman McCann (MHM CPAs)

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 Australian enterprises

Differentiator · Big Four firm with global presence and Australian expertise

Best for · Technology-driven companies, SaaS platforms, cloud services, FinTech, HealthTech, IT service providers, and organizations managing multiple compliance frameworks seeking consolidated audits

Differentiator · 25+ years compliance expertise, CPA-attested SOC 2 reports, experienced senior auditors, white-glove customer-focused approach, cross-framework expertise mapping controls across SOC 2, ISO 27001, PCI, HIPAA, and NIST

Best for · Tech and digital businesses in Australia

Differentiator · Big Four with EY Canvas platform and digital focus

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 · 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 · Large German organizations

Differentiator · Big Four with German industrial expertise

Best for · German tech and manufacturing companies

Differentiator · Big Four with EY Canvas and manufacturing focus

Best for · German financial services and automotive companies

Differentiator · Big Four with automotive industry specialization

Best for · German enterprises and DAX companies

Differentiator · Big Four with deep German market expertise

Best for · SaaS companies and organizations seeking first SOC 2 audits with company-specific, customized auditing rather than generic reports

Differentiator · Hundreds of completed examinations; tenured experts with management participation at project level; fixed-fee assessments; customized deliverables with no cookie-cutter content; focus on security program improvement beyond compliance checkbox

Best for · German SMBs and startups

Differentiator · Streamlined processes for German market

Best for · B2B SaaS companies

Differentiator · Senior auditors with direct client engagement throughout, SaaS infrastructure expertise, fast 3-week report delivery, transparent pricing

Best for · UK SMEs needing SOC 2 preparation

Differentiator · SOC 2 readiness and preparation services

Best for · UK companies needing affordable fast compliance

Differentiator · Fast turnaround with cybersecurity focus

Best for · German startups and tech companies

Differentiator · Affordable pricing for German startup ecosystem

Best for · German service organizations

Differentiator · GDPR and SOC 2 combined compliance

Best for · UK and EU companies expanding to US market needing SOC 2

Differentiator · UK-based with deep understanding of both US and EU compliance requirements

Best for · UK companies seeking efficient compliance

Differentiator · Efficient compliance with global network support

Best for · Companies with complex security needs

Differentiator · Cybersecurity expertise with compliance focus

Best for · Global mid-market companies

Differentiator · Combined Forvis Mazars network with global reach

Best for · Small to mid-sized Australian companies

Differentiator · Affordable pricing with quality service

Best for · German Mittelstand companies

Differentiator · Mittelstand specialization with global reach

Best for · German middle market companies

Differentiator · Middle market focus with manufacturing expertise

Best for · Small to mid-sized SaaS and tech companies seeking SOC 2 compliance and cybersecurity audit readiness.

Differentiator · Principal CPA holds ISO 27001 Lead Auditor certification with 25+ years in SOC 2 and compliance audits.

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 · Fast-growing SaaS and fintech companies seeking specialist SOC 2 and cybersecurity audit expertise.

Differentiator · PCAOB-registered CPA firm founded by Grant Thornton partner, combining audit rigor with specialized SOC 2 and cybersecurity expertise, performing 400+ audits annually.

Best for · All industries across Australia

Differentiator · Broad industry coverage and personalized service

Best for · Australian mid-market firms

Differentiator · Global network with Australian expertise

Best for · Australian mid-market companies

Differentiator · Mid-market specialization with global reach

Best for · European companies needing ISAE 3402, SOC 1/2, ISO 27001, NIS2, and DORA compliance — especially financial services and insurance sectors

Differentiator · European market leader in assurance and cybersecurity; Single Audit Multiple Standards approach (SOC + ISAE 3402 + ISO 27001 + NIS2 + DORA in one streamlined process); 800+ professional firm and SME clients; €6 billion revenue protected; combines advisory, assurance, and cybersecurity (pen testing, monthly scans) under one roof

Best for · Tech startups and established companies seeking fixed-fee SOC 2 and compliance audits with GRC automation support.

Differentiator · Fixed-fee SOC 1/2/3 audits with 1,000+ compliance reports issued and deep integrations across six major GRC platforms.

Best for · SaaS and FinTech companies seeking fast-track SOC 2 certification with guaranteed timelines and enterprise-grade controls.

Differentiator · Guaranteed SOC 2 certification timelines (6-8 weeks) backed by SLA with 100% in-house auditors and 98% first-time pass rate.