ISO 27001:2022 vs SOC 2: Which Do You Need First?

Both prove you take security seriously. Neither is inherently "better." The right first move depends on who's asking and where you sell, not on which framework sounds more impressive.

The core difference

ISO 27001 is a certification. You build an Information Security Management System, an accredited certification body audits it, and you receive a certificate valid for three years with annual surveillance audits. It's globally recognized and often the default expectation outside North America.

SOC 2 is an attestation. A CPA firm examines your controls against the AICPA's Trust Services Criteria and issues a report, not a certificate. Type I covers a point in time; Type II, the version enterprise buyers actually want, covers an observation window of typically three to twelve months. SOC 2 is the dominant expectation among US SaaS buyers.

How to decide

• Selling mostly to US enterprise SaaS buyers? Start with SOC 2, it's what procurement will ask for by name.
• Selling internationally, or to enterprises outside the US? Start with ISO 27001, it travels better and satisfies more regulators by reference.
• A specific deal is stalled right now? Whichever one the customer actually named. A Type I SOC 2 or a scoping letter can buy time while the real work runs.
• No specific pressure yet, just building credibility? ISO 27001 gives you a certificate to point to immediately after the audit; SOC 2's Type II report only exists after the full observation window completes.

Why you'll probably need both eventually

The control overlap between the two is substantial, access management, change management, monitoring, vendor risk, incident response, all show up in both. Companies selling into a mixed customer base, US enterprise plus international or healthcare, routinely end up holding both. The efficient path is building one control set and mapping it to both frameworks' requirements, rather than running two separate programmes that duplicate the same evidence collection twice.

What this means practically

Don't pick based on which sounds more prestigious. Pick based on the actual deal or market pressure in front of you, then design the underlying controls so the second framework is mostly a mapping exercise rather than a second build. That's the difference between a six-week addition and a six-month project.

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