The 15 Best SOC2 Auditors in 2026
We evaluated every firm in our directory on six objective criteria — years of audit experience, AICPA certification status, breadth of audit types offered, compliance framework coverage, verified client review scores, and industry specialization depth. No firm paid to appear on this list. No firm can.
How we built this ranking: Every SOC2 audit firm in our directory starts with a baseline score derived from verifiable data points, not subjective opinion. Years of experience is weighted most heavily because longevity in compliance auditing correlates directly with the depth of edge cases a firm has encountered — and edge cases are where audit quality actually matters. AICPA certification confirms a firm meets the profession's own quality standards. Audit type breadth (SOC2 Type 1, Type 2, SOC1, ISO 27001, HIPAA, PCI-DSS) indicates a firm's ability to handle complex, multi-framework engagements. Framework coverage across NIST, CIS, HITRUST, FedRAMP, and CMMC shows how many regulatory contexts a firm can navigate. Client review scores come from verified reviews submitted through our platform — we do not import or aggregate third-party reviews. Finally, industry specialization depth reflects how many sectors a firm actively serves, because an auditor who understands your industry's specific risk landscape will produce a more useful report. Read the full methodology.
The Top 15 SOC2 Audit Firms
Larson CPAs provide audit, tax, consulting, accounting to insurance, captive, technology, manufacturers, nonprofit, government, 401k, small businesses.
Moore Colson is an award-winning CPA firm based in Atlanta, serving business and high net worth individuals since 1981.
Our team of CPAs and accountants at SD Associates, P.C. has been providing tax services and financial guidance for over 30 years.
LBMC, a professional services CPA firm, offers consulting, accounting, tax, audit, advisory, human resources, staffing, security, and technology.
Mohle Adams LLP (Mohle Adams) was founded in 1946 as T.W. Mohle & Company, a Houston firm. Today’s Mohle Adams represents clients around the globe, but we remain firmly rooted in Houston.
Industry-leading assurance, tax, risk management, business consulting, and WolfPAC Integrated Risk Management® services.
Canaudit, established in 1985 and based in Burbank, California, specializes in a variety of IT audit and security consulting services.
Manufacturing IT services, cybersecurity & AI solutions for NC companies. 37+ years experience. Serving High Point, Charlotte, Greensboro & statewide.
Systems Engineering is a leading Managed Services Provider. Integrated IT, Cybersecurity & Compliance solutions. Get security without sacrificing productivity.
Silicon Valley CPA firm with a dedicated SOC, HIPAA, and ISO advisory practice. Serving technology and life sciences companies since 1990. Full-scope audit services from readiness assessment through report issuance, with ongoing monitoring support.
Managed IT Services and Support, Cybersecurity, and Compliance solutions from Honolulu. Enhance your business's efficiency and security today.
ISO 9001 ISO 17025 AS9100 AS9120 ISO 13485 ISO 14001 ISO 45001 IATF 16949 ISO 27001 ISO/TS 22163 ISO 26000 ISO 22000 Nadcap AC7108 AC7110 AC7116
GraVoc is a technology consulting company located in Peabody, MA just north of Boston. We specialize in finding technology solutions for your business.
Local IT support and managed services for Polson & Lake County businesses. Cybersecurity, cloud, and proactive tech support you can trust.
Pinnaco LLC: A leading compliance reporting agency specializing in secure, accurate reporting solutions. Ensure regulatory compliance with expert services tailored to meet your organization's needs.
How We Ranked These Firms
Rankings in the SOC2 audit space are often opaque — firms pay for placement, or lists are compiled from anecdotal reputation alone. We took a different approach. Every firm in our directory is scored on a weighted composite of six measurable factors, and the top 15 by that composite score appear on this page.
Firms with decades of compliance audit history have encountered the full spectrum of edge cases, control environments, and regulatory interpretations. There is no substitute for this.
AICPA peer review confirms that a firm's audit methodology meets the profession's own quality standards. It is the closest thing to an independent quality check in this industry.
Firms that offer SOC2 alongside SOC1, ISO 27001, HIPAA, and PCI-DSS audits bring cross-framework perspective that improves the quality of each individual engagement.
Experience across NIST, CIS, HITRUST, FedRAMP, and CMMC indicates that a firm can contextualize SOC2 controls within the broader regulatory landscape your organization navigates.
Verified reviews from actual audit clients submitted through our platform. We weight this moderately because review volume is still growing — but early signal is strong.
Serving more industries earns a small score boost, but we value depth over breadth. A firm with 3 industries and deep expertise outscores one with 8 industries and shallow coverage.
The primary sort is years of experience descending, with overall review score as the tiebreaker. We chose this approach over a blended composite score because experience is the single strongest predictor of audit quality that we can measure objectively. Read the complete methodology for scoring details and data sources.
What to Look for Beyond Rankings
A ranking tells you which firms have the strongest credentials on paper. It does not tell you which firm is the right fit for your specific situation. Before signing an engagement letter, consider these factors that no ranking can fully capture.
Ask who will actually run your audit day to day. At some firms, the partner signs the report but a junior associate does the fieldwork. At others, the partner is in the weeds. For a first-time SOC2, partner involvement materially affects the outcome.
If you use Vanta, Drata, or Secureframe, your auditor needs to be fluent in pulling evidence from that platform. An auditor unfamiliar with your GRC tool will request evidence manually, costing you time and them billable hours.
Some firms communicate primarily through formal letters and scheduled calls. Others use Slack channels and async updates. Neither is inherently better, but a mismatch with your team's working style creates friction that extends timelines.
A fixed-fee engagement eliminates the risk of scope creep inflating your bill. Hourly engagements can be cheaper if the audit goes smoothly, but they carry downside risk. Know which model each firm offers before comparing proposals.
For a deeper dive, read our guide on how to choose a SOC2 auditor and our breakdown of SOC2 auditor red flags to watch for during the proposal process.
Frequently Asked Questions
How often is this list updated?
We re-run our ranking algorithm monthly and publish a full refresh at the start of each quarter. Firms can move up or down as new client reviews come in, certifications change, or we verify updated information. The underlying data — experience, audit types, frameworks, and AICPA certification status — is verified against public records and firm disclosures at least once per quarter.
Can firms pay to be ranked higher on this list?
No. This ranking is entirely data-driven. Firms cannot pay to appear on this list, move up in position, or influence their ranking in any way. We do offer optional featured listings and premium profiles elsewhere on SOC2Scout, but those are clearly labeled and have zero effect on this editorial ranking. The methodology is the same whether a firm is a free listing or a paying customer.
What if my auditor is not listed here?
This list only includes the top 15 firms by our ranking criteria. We track over 170 SOC2 audit firms in our full directory. If your auditor is not on this list, it does not mean they are a poor choice — it means they did not rank in the top 15 on our specific combination of experience depth, certification status, audit breadth, and review scores. You can search for any firm in our full directory at /directory.
How do you verify the data used in these rankings?
Firm data comes from three sources: public filings and AICPA membership records, information submitted directly by firms through our claim process, and independent research by our team. We cross-reference years of experience against state CPA board records where available. Review scores come exclusively from verified client reviews submitted through our platform — we do not import reviews from third-party sites.
Should I just pick the number one firm on this list?
Not necessarily. The best auditor for your organization depends on factors this ranking cannot fully capture: your specific industry, company size, timeline, budget, and whether you need a firm that integrates with your GRC platform. A firm ranked 12th might be the perfect fit for a healthcare startup, while the top-ranked firm might specialize in enterprise financial services. Use this list as a starting point, then filter by your specific needs using our matching tool at /match.
Not sure which firm is right for you?
Answer a few questions about your industry, company size, timeline, and budget. We will match you with auditors from this list and our broader directory who fit your specific requirements — not just the ones with the most experience overall.