ISO 27001 vs SOC 2
By Clear Infosec · Last reviewed: August 2026
ISO 27001 is an international standard for building and certifying an Information Security Management System, resulting in a certification issued by an accredited body. SOC 2 is an attestation performed by a licensed CPA firm that reports on how a service organization's controls meet the AICPA Trust Services Criteria, resulting in a report rather than a certificate.
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ISO 27001 is a globally recognized standard that specifies requirements for establishing, operating, and continually improving an Information Security Management System. An accredited certification body audits the organization and, if requirements are met, issues a certificate that is widely recognized internationally. The standard emphasizes risk management and a documented, repeatable management system. Details are published by ISO (https://www.iso.org/standard/27001) and the certification is valid for a defined period with surveillance audits.
SOC 2
SOC 2 is an attestation engagement defined by the AICPA in which a licensed CPA firm evaluates a service organization's controls against the Trust Services Criteria, covering security and optionally availability, processing integrity, confidentiality, and privacy. The result is a report, either Type I at a point in time or Type II over a period, that the organization can share with customers and stakeholders under appropriate agreements. It is especially common among service and technology providers in the United States. Details are published by the AICPA (https://www.aicpa-cima.com/topic/audit-assurance/audit-and-assurance-greater-than-soc-2).
ISO 27001 vs SOC 2, side by side
| Dimension | ISO 27001 | SOC 2 |
|---|---|---|
| Type of result | Certification against a standard | Attestation report on controls |
| Governing body | ISO and IEC, audited by accredited bodies | AICPA criteria, performed by a licensed CPA firm |
| Core focus | An information security management system | Controls mapped to the Trust Services Criteria |
| Geographic recognition | Widely recognized internationally | Especially common in the United States |
| Time dimension | Certificate with periodic surveillance audits | Type I at a point in time, Type II over a period |
| Output shared | A certificate is publicly shareable | A report, typically shared under agreement |
When to choose ISO 27001
- You want an internationally recognized certification
- You prefer a formal, auditable management system approach
- Customers or markets you serve expect ISO 27001
When to choose SOC 2
- Your customers, often in the United States, request a SOC 2 report
- You are a service or technology provider handling customer data
- You want a report describing your controls over a defined period
How Clear Infosec helps
Clear Infosec supports readiness for both ISO 27001 and SOC 2 through risk assessment and compliance readiness services, helping organizations build controls, prepare evidence, and get ready for the audit or attestation. Because both frameworks share many underlying controls, work toward one can often support the other.
Frequently asked questions
Is ISO 27001 or SOC 2 better?
Neither is universally better. ISO 27001 is a certifiable international standard for a management system, while SOC 2 is a CPA attestation report common in the United States. The right choice usually depends on customer expectations and target markets.
Can one organization have both?
Yes. Because ISO 27001 and SOC 2 share many common controls, many organizations pursue both, and readiness work for one can reduce the effort needed for the other.
What is the difference between SOC 2 Type I and Type II?
A Type I report evaluates whether controls are suitably designed at a specific point in time, while a Type II report also tests whether those controls operated effectively over a defined period, often several months.
Still deciding between ISO 27001 and SOC 2?
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