Is SOC 2 the same as ISO 27001?

No. ISO 27001 is an international certification of an information security management system, issued by an accredited body on a three-year cycle. SOC 2 is a CPA attestation report against the AICPA Trust Services Criteria. They overlap heavily in controls but differ in outcome, auditor, and audience.

Which is harder to get, ISO 27001 or SOC 2?

ISO 27001 generally requires more upfront structure because it mandates a full management system with risk assessment and continual improvement. SOC 2, especially a Type I, can be a faster first proof point, but a SOC 2 Type II is demanding because it tests control operation over a monitoring period of three to twelve months.

Do I need both ISO 27001 and SOC 2?

Not necessarily. Choose based on where your customers are: SOC 2 is most requested in North America, while ISO 27001 is recognised globally. Many companies that sell across both markets eventually pursue both, since roughly 65 to 75 percent of the controls overlap and bundled audits reduce the incremental effort.

What is the difference between SOC 2 Type I and Type II?

A Type I report assesses whether controls are suitably designed at a single point in time, while a Type II report tests whether those controls operated effectively over a period, typically three to twelve months. Buyers usually place more trust in a Type II because it demonstrates sustained performance.

How much do ISO 27001 and SOC 2 cost?

Costs vary with scope and size. Industry ranges put first-time ISO 27001 at roughly USD 40,000 to 180,000-plus over 9 to 18 months, SOC 2 Type I at around USD 7,500 to 60,000, and SOC 2 Type II at around USD 12,000 to 100,000. Internal effort and remediation usually outweigh the audit fee.

Can I reuse ISO 27001 work for a SOC 2 audit?

Yes. Because the frameworks share a large majority of controls, evidence such as access-control policies, change management, vulnerability management, and incident response can satisfy both. Building one control environment and mapping it to Annex A and the Trust Services Criteria at the same time avoids collecting the same evidence twice.

ISO 27001 vs SOC 2: Differences & Which to Choose

ISO 27001 vs SOC 2 comes down to one core difference: ISO 27001 is an internationally recognised certification for an information security management system (ISMS), issued by an accredited certification body, while SOC 2 is an attestation report written by a licensed CPA firm that describes how well your controls meet the AICPA Trust Services Criteria. Put simply, ISO 27001 gives you a certificate the world recognises; SOC 2 gives you a detailed report that a customer reads. Both prove a mature security posture, but they achieve it through different mechanisms, audiences, and geographies, which is why the right choice depends on where your buyers are and what they ask for.

What is ISO 27001?

ISO/IEC 27001 is the international standard for building and operating an ISMS: a risk-based management system that governs how an organisation protects the confidentiality, integrity, and availability of its information. It is certifiable, meaning an accredited body audits you and issues a certificate that runs on a three-year cycle, with lighter surveillance audits in years one and two and a full recertification in year three. Because it is a management-system standard rather than a fixed checklist, the emphasis is on a working process of risk assessment, control selection, and continual improvement. If you are new to the framework, our companion guide on what is ISO 27001 walks through the clauses and Annex A controls in plain language, and our piece on statement of applicability mastery explains the document that ties your chosen controls back to your risk decisions.

What is SOC 2?

SOC 2 (System and Organization Controls 2) is an attestation engagement performed under AICPA standards, in which a CPA firm examines the controls a service organisation uses to protect customer data and issues a report on the results. It is built around five Trust Services Criteria, and you choose which apply to your services. Security is mandatory; the other four are optional depending on what you promise customers.

Security: protection of systems against unauthorised access, the one criterion every SOC 2 report must cover.
Availability: whether systems are available for operation and use as committed.
Processing Integrity: whether system processing is complete, valid, accurate, timely, and authorised.
Confidentiality: protection of information designated as confidential.
Privacy: how personal information is collected, used, retained, disclosed, and disposed of.

SOC 2 comes in two flavours. A Type I report assesses whether controls are suitably designed at a single point in time, while a Type II report tests whether those controls actually operated effectively over a monitoring period, typically running from three to twelve months. Type II carries far more weight with buyers because it demonstrates sustained performance rather than a snapshot. Unlike an ISO 27001 certificate, a SOC 2 report is a confidential document, usually shared with customers under a non-disclosure agreement rather than published on your website.

ISO 27001 vs SOC 2: the key differences

The two frameworks overlap heavily in intent but diverge in almost every mechanical detail. The list below captures the distinctions that matter most when you are deciding which to pursue.

Outcome: ISO 27001 produces a pass or fail certificate; SOC 2 produces a detailed narrative report with the auditor's opinion and, in Type II, a list of any exceptions.
Who signs off: ISO 27001 requires an accredited certification body; SOC 2 can only be attested by a licensed CPA firm.
What is assessed: ISO 27001 evaluates the ISMS as a whole, including governance and risk management; SOC 2 evaluates the specific Trust Services Criteria you select.
Time horizon: an ISO 27001 audit reviews controls over a short assessment window; a SOC 2 Type II examines control operation across a three-to-twelve-month period.
Validity: an ISO 27001 certificate is valid for three years with surveillance audits; a SOC 2 report describes a fixed past period and is usually refreshed annually.
Geography: SOC 2 is predominantly requested in North America, while ISO 27001 is recognised globally, which matters if you sell internationally.
Visibility: an ISO 27001 certificate can be displayed publicly; a SOC 2 report is confidential and shared under NDA.

SOC 2 is most common in North America, whereas ISO 27001 is recognised throughout most of the world; ISO 27001 certificates are valid for three years and can be displayed publicly, while SOC 2 reports are confidential and typically shared only under NDA (Vanta, 2026; The Knowledge Academy, 2026).

Cost and timeline

Neither framework is cheap, and both take the better part of a year for an organisation starting from scratch. Figures vary widely with company size, scope, and how much of your control environment already exists, so treat the ranges below as planning anchors rather than quotes. For most first-timers the dominant cost is internal effort and remediation, not the audit fee itself.

SOC 2 Type I: roughly 3 to 6 months and around USD 7,500 to 60,000, covering readiness, a short audit, and reporting.
SOC 2 Type II: roughly 6 to 15 months and around USD 12,000 to 100,000, because it adds a multi-month observation period.
ISO 27001: roughly 9 to 18 months and around USD 40,000 to 180,000-plus for a first certification built from the ground up.

Industry practitioners estimate first-time ISO 27001 certification at around USD 40,000 to 180,000 and 9 to 18 months, SOC 2 Type II at around USD 12,000 to 100,000 and 6 to 15 months, with roughly 65 to 75 percent of controls overlapping between the two (Atlant Security, 2026; soc2auditors.org, 2026).

If budget is your binding constraint, the good news is that a lean, well-scoped ISMS is achievable without enterprise-grade spend. Our guide on ISO 27001 on a budget for smaller organisations sets out where to economise safely and where cutting corners will cost you at the audit.

Which one should you choose?

The decision is rarely about which framework is objectively better; it is about which one unblocks revenue fastest. Start by asking your sales team what prospects actually request in security questionnaires, because that answer usually settles the matter. As a rule of thumb, if your customers are concentrated in the United States, especially in SaaS and technology procurement, SOC 2 is the more frequently demanded credential and a Type I can get you a defensible answer quickly. If you sell into Europe, the UK, the Middle East, Asia, or to large multinational enterprises, ISO 27001 carries broader recognition and often satisfies procurement teams that would otherwise ask for several regional certifications.

Maturity matters too. ISO 27001 forces you to stand up a genuine management system with leadership commitment, defined risk methodology, and continual improvement, which is valuable if you want security to be sustainable rather than a one-off scramble. SOC 2 is more flexible on scope and can be a faster first proof point, but a Type I snapshot is weaker evidence than a Type II. Many teams therefore sequence their programme: a SOC 2 Type I or ISO 27001 to open doors, then a fuller credential as the business scales.

Can you do both? Mapping controls once

Yes, and for many scaling companies doing both is the pragmatic endgame rather than a redundancy. Because the two frameworks share a large majority of their underlying controls, the marginal effort to add the second credential is far smaller than the first. Estimates from compliance automation vendors put the control overlap at roughly 65 to 75 percent, and bundled audit engagements can reduce combined cost meaningfully compared with running two fully separate projects.

The efficient path is to build one control environment and map it to both frameworks from the outset. Practically, that means treating ISO 27001 Annex A controls and the SOC 2 Trust Services Criteria as two views of the same evidence: your access-control policy, change-management process, vulnerability management, and incident response satisfy requirements in both. Design your policies, tickets, and monitoring so a single artefact answers an ISO auditor and a SOC 2 examiner alike, and you avoid collecting the same evidence twice. Where the frameworks genuinely differ, ISO 27001 demands the management-system machinery of risk assessment and continual improvement, while SOC 2 demands period-of-time evidence that controls ran consistently, so plan your monitoring window to serve the SOC 2 Type II observation period as well.

How to get started

Whichever framework you lead with, the groundwork is the same: define your scope, run a risk assessment, close the obvious gaps, and generate the evidence an auditor will ask for. If ISO 27001 is your anchor, begin with a gap analysis against the clauses and Annex A, then build your Statement of Applicability so every control decision traces back to a documented risk. If you are already certified to the 2013 edition, note that the transition to the 2022 revision has its own traps, which we cover in our article on ISO 27001 2013 to 2022 transition pitfalls, and getting that right also strengthens the control set you would map across to SOC 2.

Our recommendation for teams new to formal compliance is to invest early in understanding the ISMS mechanics rather than chasing a certificate mechanically, because a well-built management system pays for itself across every future audit, SOC 2 included. The structured, step-by-step courses linked below take you from first risk assessment to a certification-ready ISMS, with the templates and worked examples that make the difference between passing cleanly and returning for a second attempt.