Framework Comparison

ISO 27001 vs SOC 2

How they differ, which buyers ask for which, and which one a company in Vietnam or APAC should do first.

By pTrackly Compliance Team · Updated November 2026 · ISO/IEC 27001:2022 & AICPA TSC

The short answer: ISO 27001 or SOC 2?

ISO 27001 is a certificate for your information security management system (ISMS), issued by an accredited certification body and valid for three years with surveillance audits at least once a year. SOC 2 is an attestation report on the controls of a service you deliver, issued by a licensed CPA firm under AICPA standards. Choose SOC 2 when US or Canadian customers ask for a SOC 2 report; choose ISO 27001 when buyers in Japan, the EU or the rest of APAC ask for a certificate, or when you want one management system for the whole organization. Companies that sell into both markets usually end up with both, built on one shared set of controls.

ISO 27001

Best for

Buyers in Japan, the EU, Singapore and APAC; companies that want one security management system for the whole organization.

ISO 27001 with pTrackly →

SOC 2

Best for

SaaS and IT service companies selling to US and Canadian enterprises.

SOC 2 with pTrackly →

How do ISO 27001 and SOC 2 differ?

Aspect	ISO 27001	SOC 2
What it is	International standard for an ISMS (ISO/IEC 27001:2022)	AICPA attestation framework, reporting against the Trust Services Criteria
What you receive	ISO 27001 certificate (plus the auditor's report)	SOC 2 Type I or Type II report, usually shared under NDA
Who issues it	A certification body accredited by a national accreditation body (IAF member)	A CPA firm licensed by a US state board of accountancy, working under AICPA standards
Scope	The ISMS scope you define: organization, sites, services	The system behind a specific service, plus the Trust Services Categories you choose (Security is always included)
Requirements and controls	Clauses 4–10 plus 93 Annex A controls; exclusions justified in the Statement of Applicability	Common criteria CC1–CC9 for Security, plus Availability, Confidentiality, Processing Integrity or Privacy criteria if chosen
How it is assessed	Stage 1 (documentation) and Stage 2 (operation) audits; no fixed observation period, but the ISMS must be running, including an internal audit and management review	Type I: control design at a point in time. Type II: design and operating effectiveness over a period, typically 3 to 12 months; the AICPA sets no minimum
Validity and cycle	Certificate valid for 3 years; surveillance audits at least once a year, then recertification	No official expiry; customers usually expect a report whose period ended within the last 12 months, so Type II is repeated yearly
What drives cost	Scope size (people, sites, systems), which sets the certification body's audit days; internal effort; tooling	Type I or II, period length, categories in scope, system complexity, the CPA firm; internal effort; tooling
Timeline (estimate)	Scope-dependent: readiness, then Stage 1 and Stage 2. pTrackly's own certification: 3 weeks of readiness + a 4-week audit (our case, not a promise)	Scope-dependent readiness; Type I after a point-in-time examination; Type II adds an observation period of typically 3 to 12 months
Who usually asks for it	Enterprise buyers and partners in Japan, the EU, Singapore and much of APAC; public tenders	US and Canadian enterprise buyers of SaaS and IT services

Timelines are scope-dependent estimates, not promises. Cost depends on scope, the assessor and how ready you already are; independent audit fees are separate.

Should you choose ISO 27001 or SOC 2?

Choose ISO 27001 if...

Buyers in Japan, Singapore or the EU ask for a certificate
You deliver outsourcing or IT services to enterprise clients
You want one management system for the whole organization, not just one service
You plan to add ISO 42001 or ISO 27701, which share the same management-system structure

Choose SOC 2 if...

US or Canadian customers ask for a SOC 2 report
You sell B2B SaaS and buyers' vendor reviews ask for SOC 2
You want the scope limited to one specific service

Do both if...

You sell into both the US and Japan or the EU
Customer security questionnaires ask for both
You can run one control set through two audits

Can you do ISO 27001 and SOC 2 together?

Yes. Both rely on the same core security practices, so one control set can serve both audits. The difference is in the paperwork and the assessment: ISO 27001 adds the ISMS clauses (scope, risk treatment, Statement of Applicability, internal audit, management review); SOC 2 adds a system description and, for Type II, evidence that each control operated across the period.

Risk assessment
Access control and access reviews
Change management
Logging and monitoring
Incident response
Vendor management
Backup and recovery
Security awareness training

pTrackly maps one control to several frameworks, so evidence collected once counts toward both ISO 27001 and SOC 2. Scope decisions, running the controls and the audits stay with your team, the certification body and the CPA firm.

Which first for a company in Vietnam or APAC?

Where you sell	What buyers usually ask for	Start with
US, Canada (SaaS, IT services)	A SOC 2 report, usually Type II	SOC 2. Do Type I first if a deal needs evidence soon, then move to Type II
Japan	An ISO 27001 certificate (buyers can check ISMS-AC listings)	ISO 27001
EU	Commonly ISO 27001; GDPR obligations are separate	ISO 27001, plus a GDPR program if you process personal data of people in the EU
Singapore and the rest of APAC	Commonly ISO 27001	ISO 27001
Unclear or mixed	Check the security questionnaires of your three largest prospects	Whichever unblocks the most revenue first, then reuse the controls for the other

Frequently asked questions

What is the main difference between ISO 27001 and SOC 2?

ISO 27001 is a certificate for an organization's information security management system, issued by an accredited certification body and valid for three years. SOC 2 is an attestation report on a service's controls, issued by a licensed CPA firm under AICPA standards, with no official expiry date.

Which is harder, ISO 27001 or SOC 2?

ISO 27001 is heavier on the management system: scope, risk assessment, Statement of Applicability, internal audit and management review. SOC 2 Type II is heavier on evidence: every control needs proof that it operated across the whole period, typically 3 to 12 months.

Can you pursue ISO 27001 and SOC 2 at the same time?

Yes. Both rely on the same core practices, such as access control, change management, logging, incident response and vendor management, so one control set can serve both. What differs is the ISMS documentation for ISO 27001 and the system description plus period evidence for SOC 2.

Does ISO 27001 replace SOC 2 for US customers?

Usually not. US buyers who ask for SOC 2 want the CPA firm's report; some accept ISO 27001 with a completed security questionnaire, so ask the customer before you decide.

Which should a startup in Vietnam or APAC do first?

Follow the market: SOC 2 first for US and Canadian buyers, ISO 27001 first for Japan, the EU and Singapore. If the market is unclear, read your largest prospects' security questionnaires and start with the one that unblocks more revenue.