SOC 2 vs ISO 27001

SOC 2 and ISO 27001 both prove you take security seriously, but they are different things. SOC 2 is an attestation report, produced by a licensed CPA firm, that describes how well you protect customer data against a set of trust criteria. ISO 27001 is an international certification, issued by an accredited body, that your whole information security management system meets a defined standard. In practice, US software buyers usually ask for SOC 2, while European, Asian, enterprise, and government buyers more often expect ISO 27001. Pick based on where your customers are.

At a glance

What SOC 2 is

SOC 2 is an independent report on how your controls protect customer data, measured against five Trust Services Criteria: security, availability, processing integrity, confidentiality, and privacy. Only security is required; you add the others if they fit your business. A licensed CPA firm reviews your controls and issues the report, which you share with customers under NDA. It comes in two forms, Type 1 and Type 2.

What ISO 27001 is

ISO 27001 certifies that you run a complete information security management system, or ISMS: a documented, risk-based approach to protecting information, backed by a set of controls in Annex A. An accredited certification body audits you and issues a certificate valid for three years, with lighter surveillance audits in between. Because it is a recognized international standard, the certificate travels well across markets.

The main differences

SOC 2 produces a report you hand to customers; ISO 27001 produces a public certificate. SOC 2 is judged against trust criteria; ISO 27001 is judged against a management system and its controls. SOC 2 grew up in the US; ISO 27001 is global. The underlying security work overlaps heavily, often 70 to 80 percent, so once you have one, the second is far less effort.

Which should you get first?

Follow your customers. If you sell to US companies who keep asking for SOC 2, start there. If your buyers are in Europe or Asia, or you are chasing enterprise and government deals, ISO 27001 usually opens more doors. If both matter, do the one your nearest revenue needs first, then add the other while the controls are fresh.

Can you do both?

Yes, and many companies eventually do. Because the control sets overlap so much, the second framework is mostly mapping and evidence rather than new work. A readiness partner can plan both together so you are not building the same thing twice.

FAQ

Is SOC 2 or ISO 27001 harder?

They are comparable in effort. ISO 27001 leans more on documented management processes; SOC 2 leans more on demonstrating controls to an auditor. The security work behind both is largely the same.

Do investors and enterprise customers prefer one?

It depends on the market. US enterprise buyers usually ask for SOC 2. European, Asian, and government buyers more often expect ISO 27001. Investors mainly want to see a credible security program, whichever badge it carries.

How long does each take?

Both take a few months of readiness once you commit. SOC 2 Type 2 then needs an observation window, and ISO 27001 needs a certification audit. A gap assessment gives you a realistic timeline for your starting point.

Do we need both?

Not to start. Get the one your customers ask for, and add the second only when a market or a deal requires it, at which point the overlap makes it much lighter work.

Next step

If you are deciding between SOC 2 and ISO 27001, a free security review will show you where you stand today and the shortest honest path to either. Get a free security review.