ISO 27001 vs SOC 2: Which Do You Need?

For any company building trust in how it handles data, one decision comes up early: ISO 27001 vs SOC 2. Both demonstrate strong information security, but they work differently and suit different markets. This guide explains what each is, how they differ, and how to choose — or pursue both.

For the full detail on the standard, see our complete ISO 27001 guide.

ISO 27001 vs SOC 2 at a glance

ISO 27001 is an international standard you get certified against, resulting in a certificate recognised worldwide. SOC 2 is an attestation performed by a CPA firm, resulting in a detailed report that is especially familiar to buyers in North America. Both prove you manage information security well; the difference lies in format, geography, and how the assurance is delivered.

What is ISO 27001?

ISO/IEC 27001 is the international standard for an Information Security Management System. You build an ISMS, select controls from Annex A based on risk, and an accredited body certifies you against the standard. The certificate is valid for three years with annual surveillance and is understood globally — making ISO 27001 the default request in many international and European markets.

What is SOC 2?

SOC 2 is a reporting framework from the American Institute of CPAs, based on five Trust Services Criteria: security, availability, processing integrity, confidentiality, and privacy. A CPA firm examines your controls and issues a report. A Type 1 report assesses control design at a point in time, while a Type 2 report tests operating effectiveness over a period, usually several months. SOC 2 is especially common among US technology and SaaS companies.

Key differences

• Output: ISO 27001 gives a certificate; SOC 2 gives an attestation report.
• Geography: ISO 27001 is international; SOC 2 is most recognised in North America.
• Framework: ISO 27001 uses a risk-based ISMS and Annex A controls; SOC 2 uses the Trust Services Criteria.
• Assessor: ISO 27001 is audited by an accredited certification body; SOC 2 by a licensed CPA firm.
• Validity: ISO 27001 certificates run three years with surveillance; SOC 2 Type 2 reports typically cover a defined period and are renewed annually.

Which should you choose?

Choose based on your customers. If you sell internationally or into European and regulated markets, ISO 27001 is usually expected. If your customers are primarily US-based technology buyers, they may ask for SOC 2. Many companies eventually pursue both — and because the underlying controls overlap heavily, building a strong ISO 27001 ISMS covers much of what SOC 2 requires. Doing the control work once, mapped to both, is the efficient path.

Frequently asked questions

What is the difference between ISO 27001 and SOC 2?

ISO 27001 is an international standard you get certified against; SOC 2 is a US attestation report based on the Trust Services Criteria. ISO 27001 yields a certificate; SOC 2 yields a report.

Is ISO 27001 or SOC 2 better?

Neither is universally better — it depends on your customers. ISO 27001 suits international and European markets; SOC 2 is common among US technology buyers.

Can you have both ISO 27001 and SOC 2?

Yes, and many companies do. The underlying controls overlap significantly, so a strong ISO 27001 ISMS covers much of what SOC 2 requires.