ISO 27001 vs SOC 2: which should you get first?

If most of your customers are in North America, start with SOC 2. If they are international, or you simply want a certificate you can publish, start with ISO 27001. The two overlap so heavily on the underlying controls that the first one you build makes the second far cheaper, so the decision is really about your buyers, not the merits of the standards. Get that framing right and the rest is sequencing.

The core difference

These are two different kinds of thing, which is the source of most of the confusion:

	ISO 27001	SOC 2
Type	Certification	Attestation report
Issued by	Accredited certification body	Licensed CPA firm
Output	A public certificate	A report shared under NDA
Basis	A managed ISMS plus 93 Annex A controls	Five Trust Services Criteria
Common with	International and enterprise buyers	North American customers

For the detail on each, see what ISO 27001 actually requires and what SOC 2 attestation actually entails.

When to start with SOC 2

SOC 2 is the natural first move when your customers are North American businesses, especially other SaaS companies, and they are asking for a report before they sign. It is built on the AICPA framework and reported on by a CPA firm. A Type I report (control design at a point in time) can be a quick first milestone, with Type II (controls operating effectively over months) as the credible follow-up your customers will eventually want.

When to start with ISO 27001

ISO 27001 makes more sense when your customers are international, in the EU or across APAC, or large enough that procurement expects the recognized global standard. The output is a public certificate you can put in front of buyers, and the process builds a genuine information security management system (the ISMS), which is a useful operating backbone rather than just a document set. The 2022 revision organizes its 93 controls into four themes: organizational, people, physical and technological.

The overlap means you build once

The good news is that you do not run two separate programs. The control sets overlap so much that a company needing both builds one strong set of controls and maps it across. In practice that usually means standing up the ISO 27001 ISMS as the backbone and producing the SOC 2 report from the same controls, rather than starting from scratch a second time.

So, which first?

A simple way to decide:

• Customers are mostly in North America, and a deal is waiting on it: SOC 2 first, likely Type I then Type II.
• Customers are international, or you want a certificate to market: ISO 27001 first.
• Both are being demanded: build the ISO 27001 ISMS as the foundation, then layer the SOC 2 report on top, unless a single paying customer is gating a deal on one of them, in which case start there.

Whichever you pick, the trap to avoid is treating the certificate as the goal. As we argue in why compliance is not the same as security, the cleanest path is to build security that genuinely holds and let the certification describe it. That is exactly how we approach compliance and certification: controls first, paperwork second.