Insights · Comparison
ISO/IEC 27001 versus SOC 2
ISO/IEC 27001 is an international standard for an information security management system; an accredited certification body audits the system and issues a certificate valid for three years with surveillance audits between. SOC 2 is an attestation framework from the AICPA; a CPA firm examines controls against the Trust Services Criteria and issues a report, Type I at a point in time or Type II over a period, which customers read under NDA. ISO certifies a management system; SOC 2 reports on controls. International and European customers tend to ask for ISO; North American enterprise customers tend to ask for SOC 2. Many organizations end up needing both, and one evidence base can serve them.
At a glance
The criteria that decide it.
| Criterion | ISO/IEC 27001 | SOC 2 |
|---|---|---|
| What it is | Certification of a management system against a standard | Attestation report on controls against criteria |
| Who examines | Accredited certification body | Licensed CPA firm |
| Output | A public certificate | A confidential report (Type I or Type II) |
| Scope | Defined by the organization; management system clauses plus Annex A controls | Trust Services Criteria selected (Security required; others optional) |
| Duration | Three-year cycle with annual surveillance | Type II covers a period, typically six to twelve months; renewed annually |
| Who asks | International, European and public-sector customers | North American enterprise customers and SaaS buyers |
Criteria
Each one, explained.
What each is
ISO/IEC 27001 asks whether the organization runs a management system that identifies risk, selects controls, operates them and improves. SOC 2 asks whether specific controls met specific criteria over a period, as evidenced to an auditor. The first is about the system; the second is about the controls.
Output
A certificate is public and can be stated on a website. A SOC 2 report is confidential and shared with customers under agreement. Buyers who want to verify quickly prefer the certificate; buyers who want detail prefer the report.
Scope and effort
Both require policies, risk assessment, controls and evidence. ISO adds management system requirements such as internal audit and management review. SOC 2 Type II adds the burden of evidence across a period. The overlap in controls is large, which is why one evidence base can serve both.
Who asks
The decision is usually made by customers. Ask the sales team which question stalls deals. Companies selling into both markets commonly pursue SOC 2 first for speed and ISO afterward for breadth, or build an integrated system from the start.
Recommendation
Who each option suits.
Pursue whichever your customers name, and build the evidence base so the other can follow without duplication. Organizations selling to North American enterprises usually start with SOC 2 Type II; organizations with international customers or public-sector buyers usually start with ISO/IEC 27001. If both are inevitable, design an integrated management system from the beginning.
Related
Where this applies.
Sources
Primary references.
By David Selakovic · Published 2026-10-16 · Revised 2026-10-16 · Reviewed every 180 days