SOC 2 and ISO 27001 Auditors: 24 firms compared

Do SOC 2 and ISO 27001 share the same evidence?

SOC 2 and ISO 27001 can share evidence in access control, change management, risk assessment, vendor management, and incident response. The amount of reuse depends on the SOC 2 system boundary, ISO management-system scope, and audit periods, so ask for an evidence map that marks shared work.

A coordinated provider may align interviews, but that is not a fixed saving. Ask the provider to distinguish shared testing from each framework’s separate procedures rather than assuming one fieldwork week covers both.

Can one provider handle SOC 2, ISO 27001, and HIPAA?

A provider may coordinate the work, but the SOC 2 report needs a licensed CPA firm and the ISO 27001 certificate comes from a certification body. Scope HIPAA assessment or legal work separately where needed. Ask for each responsible entity, the ISO body’s accreditation, deliverable, scope, and fee in the proposal.

The firms on this page qualify for SOC 2 and ISO 27001 roles; this list does not establish their HIPAA role. Ask whether the provider will perform a HIPAA assessment, add HIPAA criteria to a SOC 2+ examination, or work alongside your legal counsel. Request separate fee lines and show which evidence requests can be shared.

For the assessment and SOC 2+ options, read How SOC 2 and HIPAA engagement scopes differ.

Can one firm do both SOC 2 and ISO 27001?

A firm can run both when it is a licensed CPA for SOC 2 and an accredited ISO 27001 certification body, or when those roles sit inside one contracted group. Confirm current accreditation scope and the named certificate entity before you sign.

Customers that require both a SOC 2 report and an accredited ISO 27001 certificate should verify current accreditation scope, legal entity, and certificate issuer. A generic ISO 27001 credential does not establish that a firm can issue the certificate.

Listed timelines cover SOC 2 fieldwork through report delivery and do not replace the Type 2 observation period or the ISO stage timetable. Treat the price range as a SOC 2 planning input and ask for renewal responsibilities in writing.

ISO 27001 is a certification program with its own stages; the primer is ISO 27001 framework explained.

Is the same assessor allowed to issue both reports?

The same assessor may work both jobs, but each artifact still needs its own signing entity. SOC 2 is a licensed CPA opinion; ISO 27001 is an accredited certification-body decision. Write both legal names into the contract.

Ask for the entities, audit stages, and separate ISO scope in writing. A certification-body logo on a website is not proof that the legal entity in your contract is the one that will issue the certificate.

Entity questions are not a vs-page; that comparison lives at SOC 2 vs ISO 27001: how they differ.

Should ISO 27001 wait until after the first SOC 2 report?

ISO 27001 should wait only when no current buyer requires the certificate. If buyers already need both, coordinating them may reduce duplicate evidence and interviews. Ask the provider to show sequencing rather than assume a combined engagement is cheaper or faster.

A consultant helps build the ISMS and a certification body audits it. Compare ISO 27001 consulting services.

How much cheaper is a combined SOC 2 and ISO 27001 audit?

A combined SOC 2 and ISO 27001 audit has no defensible fixed percentage without like-for-like proposals. Shared fieldwork can cover some evidence and interviews, but scope determines the result. Ask for a proposal that identifies shared work, then compare it with separately scoped engagements.

A cheaper combined fee that omits Stage 2, surveillance years, or a narrower ISO scope is not a saving. Put shared interviews, unique tests, and each deliverable’s legal issuer on one page before you pick the lower number.

Surveillance-year ISO work and year-two SOC 2 testing are different commercial events. Ask how a stable scope changes each fee instead of assuming the first-year combined number repeats.

Certificate issuers without a SOC 2 cut are listed on ISO 27001 certification companies.