SOC 2 vs ISO 27001: Which Does Your Organisation Need?

Sooner or later, most growing technology and service companies face the same question from customers: “Can you show us independent assurance of your security?” The answer is usually either a SOC 2 report or an ISO/IEC 27001 certificate, and the SOC 2 vs ISO 27001 debate is often the first decision a security or compliance lead has to make.

Both are respected and both cover much of the same ground. But they come from different bodies, produce different outputs and carry different weight in different markets.

This guide explains how each one works, where they differ, where they overlap and how to pursue both without doing the work twice.

What SOC 2 and ISO 27001 are

SOC 2

SOC 2 is part of the System and Organization Controls (SOC) suite developed by the American Institute of Certified Public Accountants (AICPA). It is an attestation engagement: an independent CPA firm examines a service organisation’s description of its system and its controls, and issues a report with its opinion.

Controls are evaluated against the AICPA’s Trust Services Criteria, which are organised into five categories: security, availability, processing integrity, confidentiality and privacy. Security, covered by the common criteria, is included in every SOC 2 examination. The other four are optional and chosen based on the services you provide and what customers expect.

ISO/IEC 27001

ISO/IEC 27001 is an international standard, published jointly by ISO and IEC, that sets requirements for an information security management system (ISMS). The current edition is ISO/IEC 27001:2022. It requires you to define a scope, assess and treat information security risks, select controls and continually improve the system.

Annex A lists 93 reference controls in four themes: organisational, people, physical and technological. You must consider them all and record your decisions in a Statement of Applicability, but you only implement the controls your risks and obligations require.

Importantly, ISO does not certify organisations itself. Certification is carried out by independent certification bodies, ideally ones accredited by a national accreditation body.

SOC 2 vs ISO 27001: the key differences

Attestation report versus certification

The most fundamental difference is the output. A SOC 2 engagement produces a detailed report containing the auditor’s opinion, management’s assertion, a description of the system and, for Type 2, the tests performed and their results, including any exceptions. There is no certificate and no formal pass or fail.

ISO 27001 produces a certificate stating that your ISMS conforms to the standard for a defined scope. The certificate is short and can be shared publicly, while the underlying audit reports remain between you and the certification body.

Distribution

SOC 2 reports are intended for specified users, such as customers, prospects and their auditors, and are typically shared under a non-disclosure agreement. An ISO 27001 certificate can be published on your website and is often verifiable through the certification body.

Framework structure

SOC 2 focuses on whether controls meet the Trust Services Criteria for the system in scope. ISO 27001 focuses on the management system: governance, risk assessment, internal audit, management review and continual improvement, with Annex A controls selected through risk treatment. In short, SOC 2 looks mostly at controls, while ISO 27001 looks at the system that selects and manages them.

Type 1 versus Type 2

SOC 2 comes in two forms. A Type 1 report assesses whether controls are suitably designed at a specific point in time. A Type 2 report also tests whether they operated effectively over a period, commonly between six and twelve months. Most enterprise customers ask for Type 2, and many organisations start with a Type 1 while building up the operating history a Type 2 needs.

ISO 27001 has no equivalent split. The initial certification audit has two stages: stage 1 reviews documentation and readiness, and stage 2 assesses whether the ISMS is implemented and effective.

Audit cycles

An ISO 27001 certificate runs on a three-year cycle, with surveillance audits in the intervening years and a recertification audit before the certificate expires. SOC 2 reports have no formal expiry, but customers generally expect a new report each year covering a continuous period, sometimes with a bridge letter for any gap.

Geography and market expectations

Market expectations are often the deciding factor.

• North America: SOC 2 is the most common request from US and Canadian customers, particularly in SaaS, fintech and technology procurement.
• Europe, the Middle East and Asia-Pacific: ISO 27001 is widely recognised and frequently named in tenders and supplier questionnaires. In Europe it is also a useful way to demonstrate security measures relevant to GDPR, NIS2 and DORA, although certification does not by itself prove compliance with those laws.
• Global businesses: companies selling across regions increasingly hold both, because each one removes friction with a different group of buyers.

Before choosing, look at your pipeline. Which customers are asking, what are they asking for and which deals are stalling without it?

Side-by-side comparison

Where they overlap

The good news is that the two frameworks share a large amount of common ground. Both expect:

• A documented risk assessment and a risk-based approach to controls.
• Information security policies approved by management.
• Access control, including joiners, movers and leavers processes and privileged access reviews.
• Change management, vulnerability management, logging and monitoring.
• Vendor and third-party risk management.
• Incident response and business continuity arrangements.
• Security awareness training and background checks where appropriate.

Many organisations find that most of the controls and evidence built for one framework can be reused for the other. The main extra work for ISO 27001 is the management system itself, such as internal audit, management review and the Statement of Applicability. The main extra work for SOC 2 is the system description and the evidence of consistent operation across the whole review period.

How to do both efficiently: a practical plan

1. Decide the order based on demand. If your first large deals are in the US, start with SOC 2. If they are in Europe or the Gulf, start with ISO 27001. There is no single correct sequence.
2. Align the scope. Define the products, systems, locations and teams in scope once, and keep the SOC 2 system boundary and the ISMS scope as close as possible.
3. Run one risk assessment. A single, well-maintained risk register can support ISO 27001 clause 6 requirements and the SOC 2 risk assessment criteria.
4. Build one control set. Create a unified control library and map each control to both the Trust Services Criteria and Annex A, rather than maintaining two separate lists.
5. Collect evidence once. Store policies, tickets, screenshots, logs and review records centrally and tag them to every requirement they support.
6. Operate controls continuously. SOC 2 Type 2 tests operation over time, so controls such as access reviews and vulnerability scans need a regular, recorded rhythm.
7. Coordinate audit timing. Where possible, align your SOC 2 review period with your ISO surveillance cycle. Some audit firms can perform both, which may reduce duplicated interviews and evidence requests.

How Enactia helps

Enactia is an AI-powered governance, risk and compliance platform that supports both SOC 2 and ISO 27001 programmes in one place.

• Map once, comply many times. Compliance Universe uses AI to cross-map controls across more than 50 frameworks and laws, including SOC 2 and ISO 27001, so one control and one piece of evidence can support both.
• Assess readiness. Compliance Assessments help you run gap assessments against each framework and turn findings into tracked tasks.
• Manage shared risks and vendors. Enterprise Risk Management and Vendor and Third Party Management keep a single risk register and supplier assessments that feed both programmes.
• Keep evidence audit-ready. Document Repository and Evidence Management and Policy Management centralise the documents both auditors will ask for.

Frequently asked questions

Is SOC 2 or ISO 27001 better?
Neither is better in general. SOC 2 is usually preferred by North American customers, while ISO 27001 is more widely recognised internationally. The right choice depends on where your customers are and what they ask for.

Can you get SOC 2 certified?
Strictly speaking, no. SOC 2 is an attestation, so you receive a report with an auditor’s opinion rather than a certificate. ISO 27001 is the one that results in certification.

Does ISO 27001 certification satisfy SOC 2 requirements?
Not automatically. The controls overlap heavily, but a SOC 2 report can only be issued by a CPA firm after its own examination. An ISO 27001 programme does, however, give you a strong head start.

How long does each take?
It depends on your starting point and scope. A SOC 2 Type 2 needs an observation period, commonly six to twelve months, after controls are in place. ISO 27001 needs the ISMS to be operating, including an internal audit and management review, before the stage 2 audit.

Should a start-up choose SOC 2 vs ISO 27001 first?
Let your pipeline decide. If most prospects are in the US, SOC 2 often unlocks deals faster. If you sell mainly in Europe, the Middle East or Asia, ISO 27001 is usually the stronger first step.

Conclusion: choose by market, build for both

The SOC 2 vs ISO 27001 question rarely has a permanent answer. Many organisations start with the one their customers demand and add the other as they expand. By aligning scope, running one risk assessment and building one mapped control set, you can meet both without doubling the effort.

Want to see how Enactia can help you run SOC 2 and ISO 27001 from a single platform? Contact us or book a demo with our team.