SOC 2 vs ISO 27001: Which Do You Need First

SOC 2 and ISO 27001 both prove you run a serious security program, and buyers increasingly ask for one or the other, sometimes both. The short version: SOC 2 is a US-born attestation report, ISO 27001 is an international certification, and which you pursue first usually comes down to where your buyers are.

The Core Difference: Attestation vs Certification

A SOC 2 is an attestation. A CPA firm examines your controls and issues a report describing what they found. There is no pass mark and no certificate; what you share is the report itself.

ISO 27001 is a certification. An accredited body audits your information security management system (ISMS) against the standard and, if you meet it, issues a certificate valid for three years with annual surveillance audits. What you share is the certificate plus, on request, the Statement of Applicability.

Recognition: US vs International

SOC 2 is the default request from US enterprise buyers, especially in SaaS. ISO 27001 is the more widely recognized standard in Europe, the UK, and much of the rest of the world. If your pipeline is mostly North American, SOC 2 tends to unblock more deals first; if you sell into the EU and UK or to large global enterprises, ISO 27001 carries more weight.

What They Share

The two overlap heavily. ISO 27001's Annex A controls and SOC 2's Trust Services Criteria cover much of the same ground: access control, change management, incident response, vendor management. That overlap is the good news: the controls you build for one do most of the work for the other, so the second framework is far cheaper than the first.

Which to Pursue First

• US buyers asking now: start with SOC 2, and specifically a Type 2, since that is what they expect.
• EU, UK, or global enterprise buyers: start with ISO 27001.
• Both on the horizon: build your controls once, lead with whichever framework your nearest deals require, then add the other as a mapping exercise rather than a second program.

How Concord Fits

Concord Trust treats SOC 2 and ISO 27001 as framework packs on the same platform, mapped onto one control library. You build and maintain your controls in one place, then adopt each framework and see coverage against its requirements, so pursuing both is one program with two reports, not two separate efforts.