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SOC 2 Readiness Assessmentsoc2.zip Prep PackageCompare service firms
SOC 2 Readiness FirmsPenetration Testing FirmsvCISO FirmsISO 27001 ConsultantsCompliance ConsultantsAll Service FirmsAICPA-authorised firms helping UK companies pass US enterprise procurement. Browse the 8 firms below, or tell us your scope and we'll send it to three that fit.
Tell us your scope once. We ask 3 matching UK firms for a ballpark and send the quotes 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.
Five UK-based picks for the audits buyers actually run — top-tier SOC reports, FinTech with DORA, mid-market, price-sensitive SaaS, and mid-tier FS/tech. Each recommendation names one firm with the qualifier that earned the pick.
Grant Thornton UK is the pick for UK and international mid-market and enterprise clients that need Service Organisation Controls reports across AICPA SOC 1/2/3, ISAE 3402/3000, and AAF standards from a top-tier UK CPA firm — the assurance brand US and European counterparties recognise on sight.
BSI Group is the pick for UK FinTech and regulated financial services firms that need DORA, ISAE 3402, or ISAE 3000 alongside SOC 2 — an internationally recognised assurance provider whose reports are accepted by European banking counterparties.
BDO UK is the pick for mid-market UK companies that need a nationally recognised CPA brand on the SOC 2 report — bundles audit, tax, and advisory for financial services, healthcare, manufacturing, and private equity portfolios.
Bulletproof is the pick for UK SaaS and FinTech that need affordable SOC 2 fast — cybersecurity-led firm, 3–8 week timelines, and a familiar brand to UK procurement teams reviewing supplier security.
Mazars UK is the pick when a UK company has outgrown a specialist but does not need a Big 4 letterhead — mid-tier pricing, financial services and technology depth, and a Forvis Mazars network that handles US/EU subsidiaries under one engagement.
Independent directory. Not owned by any audit firm or compliance platform; we take no cut of audit fees and charge nothing per lead. A sponsored firm pays a flat fee for its labeled placement — but payment never decides who's listed, how we match buyers to firms, or a firm's rating. How we choose →
Every firm below issues SOC 2 reports under AICPA SSAE 18 standards that US enterprise procurement accepts. Sponsored firms are paid placements, highlighted with a left rule. Pricing shown in USD (converted) for buyer comparison; we have UK firms' GBP estimates on the firm pages.
Best for · UK SMEs needing SOC 2 preparation
Differentiator · SOC 2 readiness and preparation 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 · 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 · UK companies needing affordable fast compliance
Differentiator · Fast turnaround with cybersecurity focus
Best for · UK and international organisations seeking audit, assurance, tax, and advisory from a top-10 global professional services network with 40,000 professionals across 100 countries.
Differentiator · Part of the Forvis Mazars global network (formed from the 2024 merger of Mazars and FORVIS), combining broad international reach with deep UK sectoral expertise in financial services, insurance, and public sector.
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 · UK companies seeking efficient compliance
Differentiator · Efficient compliance with global network support
Best for · UK and European companies needing SOC 1/2, GDPR, ISAE 3402, cybersecurity assessments, and data privacy compliance with UK regulatory expertise
Differentiator · Part of Moore Kingston Smith (top-15 UK accounting firm); cybersecurity and data privacy specialists combining SOC attestation with GDPR compliance; dedicated Drata partner for the UK/EU market; extensive experience with charities and nonprofits alongside tech companies. Trades on the Drata Audit Alliance directory as "Moore ClearComm" — same firm.
SOC 2 audits are remote-first, so any firm we track can serve UK buyers. Compare the best SOC 2 audit firms, browse every firm in the full SOC 2 auditor directory, or find SOC 2 auditors near you.
Tell us your scope once. We ask 3 matching UK firms for a ballpark and send the quotes 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.
UK auditors work your hours, know your data law, and bundle SOC 2 with ISO 27001 at 20–30% off the standalone price. The cases where a US auditor wins are narrow: IPO coordination with a Big Four, US operations large enough to need a local team, or a buyer's RFP that names a specific US firm.
Same-time-zone replies cut weeks off evidence-collection. GDPR + ICO understanding is native; US firms know the framework but not the case law. Bundling with ISO 27001 covers both US and EU procurement under one engagement; if you need help building the ISMS first, compare ISO 27001 consultants before you book the audit.
| Factor | UK-based | US-based |
|---|---|---|
| Type 2 cost | £12K – £55K | $15K – $450K |
| Time zone | GMT & BST · same-day | EST & PST · 12–24 h lag |
| GDPR & ICO | Native expertise | Framework only |
| ISO 27001 bundle | Common · discounted | Less common · full price |
| Timeline | 3 – 9 mo | 3 – 20 mo |
| Travel cost | None (local) | May apply for on-site |
Five stages, run end to end. Plan for 3–9 months from first scoping call to issued Type 2 report. Time-zone alignment, ISO bundling, and prior readiness work shrink it; manual evidence and Big Four engagement protocols expand it.
UK companies typically need SOC 2 when:
Type 2 is recommended for most UK companies targeting US enterprise sales. Type 1 may suffice for early-stage or exploratory market entry.
UK-based auditors are ideal for most situations. Consider US auditors only if:
UK companies can complete SOC 2 in 3–9 months with proper preparation and a responsive auditor. Add 4–8 weeks of readiness work if controls aren't yet in place.
Once your SOC 2 report is issued, use it to respond to security questionnaires, accelerate enterprise procurement cycles, differentiate from competitors without SOC 2, and build trust with US customers.
Four common questions from UK buyers — pricing, US-vs-UK choice, timeline, and the SOC 2 vs ISO 27001 question that comes up on almost every call.
Generally, yes. While you can use US auditors, UK-based auditors operate in your time zone (GMT/BST), understand UK data protection laws (GDPR), and can often bundle SOC 2 with ISO 27001 for dual compliance.
In 2026, typical costs for UK-based firms are: Specialist firms (£12K-£30K), Mid-tier firms (£25K-£50K), and Big Four firms (£50K-£120K+). Prices vary based on company size and scope.
Yes, but be prepared for time zone differences and potentially higher fees. Most UK companies prefer UK-based auditors who are affiliated with the AICPA but offer local support.
Type 1 audits typically take 2-6 weeks. Type 2 audits require an observation period of 3-12 months, plus 4-6 weeks for reporting. UK auditors can often fast-track the preparation phase.
SOC 2 attestation vs consulting · SOC 2 reports must be issued by licensed Certified Public Accountants (CPAs) under AICPA standards (SSAE 18). In the UK, only firms authorised by the AICPA or holding ICAEW practicing certificates can issue official SOC 2 attestation reports.
Verify credentials · many UK firms offer "SOC 2 consulting" or "SOC 2 preparation services" but cannot issue the actual attestation report. Confirm AICPA / ICAEW authorisation, SOC 2 attestation authority (not just consulting), and SSAE 18 conformance before signing.
Disclaimer · pricing estimates and timelines shown are approximations based on publicly available information and user-submitted data. Actual costs and timelines vary based on company size, complexity, and scope. This directory includes both licensed audit firms and consulting firms; always confirm attestation authority before signing contracts.
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