SOC 2 is a US-centric attestation report, audited by a CPA firm and governed by the AICPA. ISO 27001 is an internationally recognized certification, audited by an accredited registrar and governed by ISO/IEC. Both prove an organization takes information security seriously, but they produce different documents, follow different audit processes, and dominate in different regions.
Side by side
| SOC 2 | ISO 27001 | |
|---|---|---|
| Governed by | AICPA (American Institute of CPAs) | ISO/IEC, jointly |
| Output | An attestation report (auditor's opinion) | A certification (pass/fail against a standard) |
| Audited by | Licensed CPA firms | Accredited certification registrars |
| Dominant region | North America | International, especially Europe |
| Validity / renewal | Type II reports typically cover 6–12 months and get renewed annually | Valid 3 years, with annual surveillance audits |
Type I vs. Type II, briefly
Within SOC 2 there's a further split: a Type I report checks whether controls are designed correctly at a single point in time; a Type II report checks whether those controls actually worked consistently over an observation period, often 3–12 months. Type II is the far more meaningful signal to a customer, since it's evidence over time, not a snapshot.
Which one a company actually needs
It largely comes down to who's buying. A SaaS company selling mainly to US enterprise customers is far more likely to be asked for SOC 2. A company selling internationally, especially into Europe, is more likely to be asked for ISO 27001. Plenty of companies end up pursuing both, since the underlying control work overlaps heavily — most of the evidence collection, policy writing, and testing done for one directly supports the other.
Where GRC work fits
Whichever framework a company targets, the actual GRC work looks the same day to day: writing and maintaining policies, collecting audit evidence, testing controls, and tracking gaps in a risk register. The certification or report is the output; the ongoing GRC discipline is what actually produces it.