SOC 2 vs. ISO 27001: An Honest Comparison
Two different instruments answering two different questions — a US-centric attestation report versus an internationally recognized certifiable standard. Here’s when you need one, both, or either.
Schedule a Consultation →SOC 2 is an attestation — an auditor’s written opinion on your controls, issued under AICPA standards, shared with customers under NDA. It is not something you can “hold.” ISO 27001 is a certifiable management-system standard — you build an Information Security Management System (ISMS), an accredited certification body audits it, and if you pass, you receive an actual certificate valid for a three-year cycle with annual surveillance audits. One is a report about your controls; the other is a certification of your management system.
SOC 2 vs. ISO 27001
Which One Do You Actually Need?
Your buyers are primarily US-based enterprise, SaaS, and B2B customers, and your vendor risk questionnaires are asking for a SOC 2 report by name.
You sell into international markets, EU or UK enterprise and government buyers, or industries where a certifiable, publicly displayable credential carries more procurement weight than a restricted-use report.
You sell globally to both US enterprise and international buyers, or you’re a larger, multi-market platform where the overlap in underlying controls makes a second attestation materially cheaper than starting from zero.
The good news: the underlying control work overlaps heavily. Access control, change management, encryption, logging, and incident response satisfy both SOC 2’s Common Criteria and the bulk of ISO 27001’s Annex A controls. Organizations that build a converged control environment — rather than two separate programs — typically add the second framework at a fraction of the cost of the first. See realistic SOC 2 timeline and cost planning as a starting reference point.
Not Sure Which Framework Your Buyers Actually Require?
Armorstack will map your buyer base and existing commitments against both frameworks and tell you honestly which one — or both — you need.