ISO 27001 vs SOC 2: Which One Does Your Business Actually Need?

Short answer to ISO 27001 vs SOC 2: If your customers are in North America and asking for a security report, you most likely need SOC 2. If you sell internationally or want a formal, auditable security program you can certify, ISO 27001 is the better fit.

The distinction underneath is straightforward: SOC 2 is an attestation report written by a CPA firm about how well your controls operate, while ISO 27001 is a certification of your information security management system (ISMS) issued by an accredited body. Plenty of growing companies end up pursuing both, because the two control sets overlap heavily and one evidence base can serve each.

Here is how to tell which one your business needs right now, what each involves, and how to avoid paying for the same work twice.

ISO 27001 and SOC 2 in plain terms

Both frameworks prove you take information security seriously. They go about it in different ways.

What ISO 27001 is

ISO 27001 is the international standard for building and running an ISMS: a documented, risk-based system for managing information security. The current version, ISO 27001:2022, defines 93 Annex A controls grouped into four themes (organizational, people, physical, and technological) and requires a set of mandatory documents, including a risk assessment, a risk treatment plan, and a Statement of Applicability that records which controls you apply and why.

An accredited certification body audits your ISMS in two stages and, if you pass, issues a certificate valid for three years, subject to annual surveillance audits. Read our guide to ISO 27001:2022 for the full picture, and our breakdown of the Annex A controls if you want the control-level detail.

What SOC 2 is

SOC 2 is not a certification. It is an attestation report produced by a licensed CPA firm under the American Institute of CPAs (AICPA) framework. The auditor evaluates your controls against the Trust Services Criteria, which cover five categories: Security, Availability, Processing Integrity, Confidentiality, and Privacy.

Only Security, the “common criteria,” is mandatory; you add the others when they match what you promise customers. A SOC 2 Type I report assesses control design at a single point in time, while a Type II report assesses how those controls operated over a period, usually three to twelve months. The finished report is confidential and typically shared with customers under NDA. Our SOC 2 guide for SaaS companies covers how the process runs.

ISO 27001 vs SOC 2 at a glance

Factor	ISO 27001	SOC 2
What it is	Certification of an information security management system (ISMS)	Attestation report on control effectiveness
Governing body / auditor	ISO/IEC; audited by accredited certification bodies	AICPA; audited by licensed CPA firms
Geographic pull	Global, strong in Europe, the Middle East, and Asia	Dominant in North America
Output	A public certificate, valid 3 years	A confidential report, shared under NDA
Structure	93 Annex A controls in 4 themes, plus mandatory ISMS documents	5 Trust Services Criteria; only Security is required
Audit / report types	Stage 1 and Stage 2 certification audit	Type I (point in time) or Type II (over a period)
Typical timeline	About 3 to 12 months to first certification	Several months, plus a 3 to 12 month Type II window
Typical all-in cost (SMB)	Roughly $10k to $50k range	Roughly $30k to $80k range
Best for	Global sales, a formal program, public proof	North American SaaS, customer-driven assurance

How to choose the one you need

The ISO 27001 vs SOC 2 decision usually comes down to a handful of questions. Work through them in order; the first clear “yes” usually settles it.

1. What are customers actually asking for? If prospects name “SOC 2 report” or “ISO 27001 certificate” in their security questionnaires or contracts, follow the demand. Nothing else outranks a signed deal waiting on a specific document.
2. Where are your buyers? SOC 2 is the default expectation among North American technology buyers. ISO 27001 carries more weight in Europe, the Middle East, Asia, and with global enterprises.
3. Do you need something public or something confidential? An ISO 27001 certificate can sit on your website and trust page. A SOC 2 report is a confidential document you release under NDA.
4. How mature is your security program? If you are formalizing security for the first time, ISO 27001 gives you a management-system blueprint to build around. If you already run solid controls and mainly need to evidence them for customers, SOC 2 is a faster route to a shareable result.

Can you pursue both without doubling the work?

Yes, and many companies do. Independent analyses put the control overlap between the two frameworks at roughly 40% to 85%, depending on scope. Because both draw on the same underlying practices, such as access control, change management, incident response, and vendor risk, one set of policies and evidence can support both audits.

A common sequence is to stand up the ISO 27001 ISMS first, then map the same controls to the Trust Services Criteria for a SOC 2 report; you can also run it the other way if a US customer needs SOC 2 sooner. Building your control set once, then reusing the evidence, is what keeps dual compliance affordable.

What each one costs and how long it takes

Treat the figures below as typical ranges for a small to mid-sized company, not quotes. Actual cost and timing depend on your size, scope, and how much you build from scratch.

• ISO 27001: Commonly 3 to 12 months to first certification. All-in costs for smaller organizations often fall in the region of $10,000 to $50,000 once you include preparation, tooling, and the certification-body audit. The certificate is then valid for three years, with annual surveillance audits.
• SOC 2: A Type II report requires an observation window, commonly 3 to 12 months, on top of preparation, so plan for several months minimum. Auditor fees for smaller companies often run around $10,000 to $25,000, with all-in costs (readiness, tooling, and audit) frequently landing in the $30,000 to $80,000 range, renewed annually.

The biggest cost lever in both cases is how much documentation and control evidence you already have. Starting from a structured template set rather than a blank page is where most of the savings come from.

Frequently asked questions

Is SOC 2 a certification?

No. SOC 2 results in an attestation report signed by a CPA firm, not a certificate. Calling a company “SOC 2 certified” is common shorthand, but the accurate phrasing is “SOC 2 compliant” or “has a SOC 2 report.” ISO 27001, by contrast, is a true certification.

Which is better for a US SaaS startup?

In the ISO 27001 vs SOC 2 decision, most US-focused SaaS startups find a SOC 2 Type II report is the more requested document and the faster path to unblocking deals. If you also sell into Europe or to global enterprises, or you want a public certificate, add or start with ISO 27001.

How many controls does ISO 27001 have?

ISO 27001:2022 lists 93 Annex A controls across four themes: organizational, people, physical, and technological. You do not have to apply all 93. Your Statement of Applicability records which ones you include and justifies any exclusions.

Can one project cover both frameworks?

Yes. Because the control sets overlap substantially, you can design one control environment and use the shared evidence for both an ISO 27001 certification and a SOC 2 report. Doing them together, or back to back, is usually cheaper than treating them as separate projects.

How long is each valid?

An ISO 27001 certificate is valid for three years, with annual surveillance audits to keep it active. A SOC 2 Type II report covers a defined past period and is typically refreshed every 12 months so customers always have a current report.

Getting started without the blank page

Once you have settled the ISO 27001 vs SOC 2 question, most of the effort is documentation: policies, procedures, a risk assessment, and the control evidence your auditor will ask for. If ISO 27001 is your path, our editable ISO 27001 Toolkit gives you the mandatory policies, a ready-to-tailor Statement of Applicability, and templates mapped to all 93 Annex A controls, so your team adapts proven documents instead of writing them from scratch. That is the fastest way to turn the decision you just made into an audit-ready program.