Does my SOC 2 auditor need to be a CPA firm?
Yes. A SOC 2 report is an AICPA attestation issued under SSAE No. 18, so it must be signed by a licensed CPA firm. Readiness prep can come from anyone, but only a CPA firm can issue the report.
The full answer
Yes, and this is one of the few hard rules in SOC 2. The framework was created by the AICPA, and a SOC 2 report is a formal attestation issued under the AICPA's SSAE No. 18 standard. Only a licensed CPA firm can perform that attestation and sign the report, so a consultant, a GRC vendor, or a security boutique cannot issue one on its own.
That does not mean everyone touching your audit must be a CPA. Readiness assessments, gap analysis, evidence collection, and control remediation can be handled by consultants or by a GRC platform such as Vanta, Drata, or Secureframe. The distinction is that the final report, the deliverable your customers ask for, has to carry a CPA firm's opinion.
Because CPA firms performing attestation work fall under AICPA oversight, they undergo peer review roughly every three years, and independence rules bar them from auditing controls they designed or operate. That structure is what gives a SOC 2 report credibility with enterprise buyers, who typically will not accept an unsigned or self-attested document.
So verify the license before you sign. Ask for the firm's CPA license details, confirm which state board it is registered with, and request its latest peer review result. Audits booked through the AuditNex network are performed by licensed CPA firms and start at $2,500, averaging about $5,000.
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Related questions
Are cheap SOC 2 audits legit?
Sometimes. A low price is legitimate only if a licensed CPA firm issues the report under SSAE No. 18. Suspiciously cheap 'audits' that skip fieldwork, use non-CPA reviewers, or auto-generate reports are not real SOC 2 attestations.
Can my SOC 2 auditor also do my penetration test?
Usually no. Under AICPA independence rules, the CPA firm that audits your controls cannot design or operate them, and a penetration test it then relies on can compromise that independence. Use a separate provider for the pentest.
Can my SOC 2 auditor help me remediate issues they find?
Not directly. Under AICPA independence rules your attestation firm cannot design or operate the controls it audits, so it cannot fix your gaps. It can flag deficiencies, but remediation must come from you or a separate advisor.
Do I need a local SOC 2 auditor?
No. SOC 2 audits run remotely, so your auditor's location rarely matters. What matters is that a licensed CPA firm signs the report under SSAE No. 18. Time-zone overlap and industry experience help more than being in your city.
Does the auditor's brand name matter to enterprise buyers?
Less than founders expect. Most enterprise buyers accept any SOC 2 report signed by a licensed CPA firm; they check the scope, opinion, and exceptions, not the auditor's logo. A recognizable name can smooth procurement but seldom decides it.
How do I choose a SOC 2 auditor?
Choose a licensed CPA firm (SOC 2 is a CPA attestation), check its current AICPA peer review, confirm experience with your industry and stack, and compare fixed quotes. AuditNex network audits start at $2,500 and average about $5,000.
Sources: AICPA SSAE No. 18 attestation standards; AICPA peer review program; AuditNex network rate card, 2026. Answer written and maintained by the AuditNex research team; last reviewed July 26, 2026. AuditNex is a marketplace — accredited firms price and scope engagements independently.