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SOC 2 Readiness Assessmentsoc2.zip Prep PackageCompare service firms
SOC 2 Readiness FirmsPenetration Testing FirmsvCISO FirmsISO 27001 ConsultantsCompliance ConsultantsAll Service FirmsWe track 38 SOC 2 auditors that credibly serve enterprise buyers: 17 Big Four practices alongside large national CPA firms and enterprise-grade attestation specialists, with enterprise engagements typically running from $40K into six figures. Most firms can issue a SOC 2. Far fewer handle SOC 1 alongside it, carve out subservice organizations cleanly, and carry a name that clears Fortune 500 vendor review.
Free and anonymous. At least 3 quotes in 48 hours. One call, not five.
For enterprise buyers, Schellman, A-LIGN, and Coalfire are the strongest starting points when the report will face demanding security reviewers, and Deloitte, PwC, EY, or KPMG when a customer's procurement team wants a Big Four name on the cover. We track 38 enterprise-capable firms; compare SOC 1 + SOC 2 scope, subservice-organization handling, and brand recognition before choosing.
Six picks for the enterprise audit scenarios buyers actually run: multi-framework cloud, combined SOC 1 + SOC 2, a Big Four cover, cyber-heavy FedRAMP, a procurement-familiar national brand, and a mid-enterprise specialist. Each names one firm with the qualifier that earned the pick.
Schellman is the pick for an enterprise cloud or SaaS platform that needs SOC 2 sitting next to FedRAMP, PCI DSS, ISO 27001, and HITRUST under coordinated scope, one of the largest US attestation specialists, PCAOB-registered, and a name enterprise security reviewers already recognize on the report cover.
A-LIGN is the typical pick for an enterprise service organization that needs SOC 1 and SOC 2 issued together with HITRUST, FedRAMP, or PCI in the same program, one of the highest-volume US SOC practices, so the boundary is scoped once and procurement teams know the brand.
Deloitte is the pick when the customer relying on your report is a Fortune 500 whose third-party risk team wants a Big Four name on the cover, global SOC 1 and SOC 2 delivery, deep subservice-organization handling, and the procurement familiarity that clears enterprise vendor review fastest.
Coalfire is the option for enterprises where the SOC 2 sits inside a heavier cyber and FedRAMP program, an established assessor for cloud and federal work whose depth in security testing and authorization is a fit when the report is one deliverable among several to demanding reviewers.
BDO USA is the pick for a mid-market-to-enterprise organization that wants a large, procurement-familiar national CPA brand issuing the report, broad SOC 1 and SOC 2 delivery across technology, healthcare, and financial services without Big Four pricing.
360 Advanced is the pick for a mid-enterprise that wants SOC 1, SOC 2, PCI DSS, HITRUST, and CMMC coordinated by one PCAOB-registered specialist, credentialed enough for enterprise reliance without the cost or timeline of a Big Four engagement.
Choose an enterprise SOC 2 auditor by starting from who relies on the report and what else is in scope, not from price. Confirm the firm can issue SOC 1 alongside SOC 2 on aligned observation periods, that it handles subservice-organization carve-outs precisely, and that its name carries enough recognition to clear your largest customers’ third-party risk review. Then compare named engagement leadership, multi-framework coordination, and a committed report-delivery date in writing.
Not always. A Big Four firm (Deloitte, PwC, EY, KPMG) is the right call when a Fortune 500 customer’s procurement team specifically wants that name on the report cover, or when global entities and combined SOC 1 + SOC 2 argue for one large firm. For many enterprises, a recognized attestation specialist such as Schellman, A-LIGN, or Coalfire carries equal credibility with security reviewers at lower cost and faster timelines. The test is whether the reviewer relying on the report will accept the signing firm, not whether the firm is Big Four.
Usually yes. SOC 1 and SOC 2 share a control environment, a system description, and much of the same evidence, so one firm scopes the boundary once, reuses overlapping control testing, and issues both reports on aligned observation periods, which is what your customers’ financial-statement auditors expect at year end. Splitting the two across firms doubles evidence requests and risks conflicting system descriptions. Ask each shortlisted firm to walk through how it coordinates SOC 1 and SOC 2 scope in a single program.
An enterprise proposal should name the signing firm and engagement leadership, define the exact TSCs and whether SOC 1 is bundled, state how subservice organizations are carved out and which CSOCs and CUECs apply, list any frameworks running alongside (HITRUST, FedRAMP, PCI DSS, ISO 27001), and commit to a report-delivery date. It should also explain how recurring evidence is reused at renewal and how new subservice organizations and entities are added to scope. A credible enterprise auditor can describe all of this before fieldwork begins.
| Firm | From price | Timeline | Best for |
|---|---|---|---|
| Schellman | $20K | 3–12 wk | enterprise cloud platforms running SOC 2 alongside FedRAMP, PCI, and ISO |
| A-LIGN | $15K | 3–12 wk | high-volume SOC 1 + SOC 2 with framework fan-out on one engagement |
| Deloitte | $60K | 6–18 wk | a Big Four brand on the report cover for Fortune 500 procurement |
| Coalfire | $40K | 4–12 wk | cyber-heavy and FedRAMP-driven enterprise environments |
| BDO USA | $30K | 5–13 wk | a national CPA brand procurement already recognizes |
| 360 Advanced | $30K | 6–12 wk | mid-enterprise multi-framework scope from a credentialed specialist |
Independent directory. Not owned by any audit firm or compliance platform; we take no cut of audit fees and charge nothing per lead. How we choose →
Big Four, large national CPA firms, and enterprise-grade attestation specialists with documented experience issuing enterprise-scale SOC 1 and SOC 2 reports. Sponsored firms are paid placements and listed first; the rest follow by verification and firm scale. Pricing is in USD and timelines are in weeks. Use the sort controls to re-rank by entry price or timeline.
Type 1 and Type 2 figures reflect a mix of firm-confirmed numbers, public sources, and our own estimates, refreshed periodically. Actual cost depends on company size, scope, and Trust Service Criteria.
Best for · Large enterprises and public companies with complex environments
Differentiator · Big Four brand recognition, global delivery capabilities
Best for · High-growth tech companies preparing for IPO
Differentiator · Strongest startup/scale-up practice among Big Four
Best for · IPO-track companies and Fortune 500 enterprises
Differentiator · Premium brand value for investor relations and M&A scenarios
Best for · Regulated industries and companies with international operations
Differentiator · Strong financial services expertise and regulatory knowledge
Best for · International companies with US subsidiaries needing compliance
Differentiator · Strong international network and cross-border expertise
Best for · German financial services and automotive companies
Differentiator · Big Four with automotive industry specialization
Best for · Large Canadian organizations
Differentiator · Big Four firm with global presence and comprehensive cybersecurity services
Best for · Large Australian enterprises
Differentiator · Big Four firm with global presence and Australian expertise
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 · Multinational corporations with Canadian operations
Differentiator · Big Four with EY Canvas platform and innovation focus
Best for · Canadian financial services and large organizations
Differentiator · Big Four with strong risk management focus
Best for · Australian enterprises and government
Differentiator · Big Four with industry-specific Australian expertise
Best for · Australian financial services firms
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 · Tech and digital businesses in Australia
Differentiator · Big Four with EY Canvas platform and digital focus
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 enterprises and DAX companies
Differentiator · Big Four with deep German market expertise
Best for · Healthcare and financial services companies needing data analytics
Differentiator · Risk-based audits with proprietary data analytics and AI tools
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 · 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 · 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 · 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 · 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 · B2B SaaS companies (Series A through growth stage) using Drata, Vanta, or Secureframe that want a fast remote audit. AI/ML companies needing SOC 2 and ISO 42001 together. FinTech, healthtech, and security vendors. CSPs pursuing FedRAMP authorization. DoD contractors needing a C3PAO (authorized March 2026). Teams that prefer same-day audit communication over Slack.
Differentiator · A cybersecurity-first firm founded in 2018 by CREST-certified penetration testers rather than 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 around $10K with report delivery in 4-6 weeks once fieldwork begins. Holds FedRAMP 3PAO, CMMC C3PAO (March 2026), PCI QSA, HITRUST, and ANAB ISO accreditation for 27001/27701/42001, plus CREST and CSA STAR. Its Cacilian PTaaS platform and CAIT (Continuous AI Tester) add offensive security to the audit workflow. Operates under Prescient Security Management LLC as an AICPA alternative practice structure.
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 · 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.
Best for · Global mid-market companies
Differentiator · Combined Forvis Mazars network with global reach
Best for · Middle-market companies ($50M-$500M revenue) seeking Big Four quality at lower cost
Differentiator · Largest non-Big Four firm with middle market specialization
Best for · PE-backed companies and middle market firms with growth plans
Differentiator · Strong private equity relationships and transaction support
Best for · Private and public companies across all industries seeking integrated audit, tax, consulting, and wealth advisory services.
Differentiator · 9,300+ professionals across 120+ US locations delivering seamlessly integrated audit, consulting, tax, wealth advisory, and digital services.
Best for · Mid-market and large private businesses across all sectors seeking comprehensive audit, tax, and advisory services from a nationally recognized firm.
Differentiator · World's fifth-largest accounting network with 8,000 UK professionals across 18 locations, offering deep sector specialisms and global reach within a cohesive organization. Listed on the Drata Audit Alliance directory as "BDO Consulting" — same firm, UK practice.
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 · Regional companies and mid-market firms seeking personalized service
Differentiator · 6th-largest US CPA firm formed by the Baker Tilly + Moss Adams merger (June 2025); Hancock Askew joined in May 2025, adding Southeast coverage. National reach with strong West Coast presence inherited from Moss Adams. BT Portal for audit management. Senior auditor involvement with 24-48 hour responsiveness.
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 companies seeking a full-service firm that combines SOC reporting with broader technology advisory, ERP, and cybersecurity services under one roof.
Differentiator · Sikich CPA LLC (the licensed attest entity) operates within an alternative practice structure alongside Sikich LLC's broad technology, advisory, and managed services, offering SOC audits alongside GRC consulting and ERP implementations.
Best for · Middle market and Fortune 500 companies seeking a Top 30 U.S. accounting firm with SOC 1, SOC 2, SOC 3, and SOC for Cybersecurity services alongside a comprehensive international network in 100 countries.
Differentiator · UHY LLP is a Top 30 U.S. CPA firm and PCAOB-registered independent member of UHY International (top 20 global accounting network), offering a risk-based, business-size-customized SOC audit approach with 40+ U.S. offices and SOC readiness assessments.
Best for · Canadian and international companies needing SOC 1/2/3, ISO 27001, PCI DSS, GDPR, CCPA, PIPEDA, AML, or blockchain compliance from a dual CPA firm and ISO Certification Body
Differentiator · Both a CPA audit firm AND an accredited ISO Certification Body — rare dual capability; Big 4 CPA and CA professional backgrounds; blockchain and crypto compliance expertise; specialist socassurance.ca division; serves large corporations to growth-stage companies internationally
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Tell us your scope once. We ask 3 firms that run enterprise-scale SOC 1 + SOC 2 engagements and send the ballparks back side by side.
We collect ballpark quotes from 3 matched firms for you. Free and anonymized: firms quote the scope, not your name, and you talk to one only when you pick it.
Enterprise SOC 2 does not have one right firm tier. The decision comes down to who relies on the report and what else is in scope. Match the cover and the capability to the buyer, not the other way around.
| Factor | Best fit | Trade-off |
|---|---|---|
| Big Four (Deloitte, PwC, EY, KPMG) | Fortune 500 reliance, global entities, SOC 1 + SOC 2, name recognition on the cover | Highest cost and longest timelines; you are a small account |
| National / mid-tier CPA (RSM, BDO, Grant Thornton, CBIZ) | Procurement-familiar brand, multi-entity scope, mid-market-to-enterprise pricing | Less specialized in cloud/security controls than the attestation shops |
| Enterprise specialist (Schellman, A-LIGN, Coalfire) | Cloud and security depth, multi-framework fan-out, recognized by security reviewers | Not the Big Four brand a conservative procurement team may insist on |
| Mid-enterprise specialist (360 Advanced, ControlCase) | Coordinated multi-framework scope, PCAOB-registered, enterprise reliance without Big Four cost | Smaller bench for very large multi-entity or global engagements |
Five selection axes where enterprise auditor choice diverges from the startup speed-and-budget calculus: the report is going to face a Fortune 500 risk team, not just close a first deal.
Enterprise service organizations frequently need SOC 1 (for customers’ financial-statement auditors) and SOC 2 in the same cycle. The right firm scopes one control environment and one system description, reuses testing where the criteria overlap, and aligns observation periods so both reports land together at year end.
Enterprise systems lean on AWS, colocation, and payment processors. The auditor’s carve-out versus inclusive-method decision, plus precise complementary subservice-organization and user-entity controls (CSOCs and CUECs), is what keeps a reviewer from flagging an unaddressed critical vendor.
When a Fortune 500 third-party risk team relies on your report, a signing firm they already recognize clears review faster. That can be Big Four, or a specialist like Schellman or A-LIGN that security reviewers trust, but it should never be a firm no reviewer has heard of.
Enterprises rarely stop at SOC 2. HITRUST, FedRAMP, PCI DSS, and ISO 27001 often run alongside it. A firm that coordinates the shared control set across frameworks avoids duplicated evidence requests and conflicting system descriptions.
The report exists to retire vendor security questionnaires and satisfy MSA and uptime-SLA obligations at scale. Enterprise-experienced firms scope Availability against contractual SLAs and shape the report so it answers the questions your largest customers actually ask.
Four lines: auditor fees, additional-framework work, GRC platform, and internal program time. The wide auditor-fee range is driven by TSC count, SOC 1 bundling, in-scope systems and entities, and how many frameworks run alongside, not by firm markup. Price the same written scope across firms to compare.
$40–200K+
$25–120K
$15–60K
400–900 hrs
Eight questions specific to enterprise auditor selection: brand reliance, combined SOC 1 + SOC 2, subservice-organization carve-outs, procurement deadlines, cost range, judging report quality, bridge letters, and one report versus several.
SOC 2 attestation vs consulting · SOC 2 reports must be issued by licensed Certified Public Accountants under AICPA standards (SSAE 18). GRC vendors and security firms can support an enterprise program, but they cannot issue the attestation report itself.
Verify credentials · Confirm AICPA peer-review status and SSAE 18 attestation authority before signing. For reports that face Fortune 500 reliance, confirm the signing firm and how it handles subservice-organization carve-outs.
Disclaimer · Pricing and timelines shown reflect a mix of firm-confirmed figures, public sources, and our own estimates, refreshed periodically. Enterprise costs vary widely with TSC count, SOC 1 bundling, entity and system count, and additional frameworks.
Tell us your scope: SOC 1 + SOC 2, subservice organizations, entities in scope, and which frameworks run alongside. We send it to enterprise-capable firms that fit. They reply with a ballpark, a timeline, and what makes them different. Anonymous until you pick.
Free and anonymous. At least 3 quotes in 48 hours. One call, not five.
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