ISO 27001 vs SOC 2: which to pick

1. What each framework actually is

ISO/IEC 27001:2022 specifies the requirements for an Information Security Management System (ISMS) and is externally certified against every three years by an accredited certification body, with annual surveillance audits (ISO/IEC, 2022).

SOC 2 is not a standard but an attestation engagement performed by a CPA firm under AICPA's SSAE 18 against the Trust Services Criteria (Security, Availability, Processing Integrity, Confidentiality, Privacy). The output is a restricted-use report, not a certificate (AICPA, 2022).

2. Head-to-head comparison

Dimension	ISO 27001	SOC 2
Output	Certificate	Attestation report
Auditor	Accredited certification body	Licensed CPA firm
Cycle	3-year cert + annual surveillance	Annual Type II
Primary market	Global, EMEA-heavy	US-heavy
Public listing	Certificate published	Report shared under NDA
Prescriptive controls	93 Annex A controls (baseline)	Criteria + firm's chosen controls

3. Decision framework

Step 1

Map your buyer geography

Pull the last 12 months of security questionnaires. Count SOC 2 vs ISO 27001 mentions — the majority framework wins the first project.

Step 2

Weight the sales pipeline

If enterprise deals in EMEA or public sector are within 6 months, ISO 27001 is rarely optional. FedRAMP or US healthcare pipelines push toward SOC 2.

Step 3

Size the internal effort honestly

SOC 2 Type I can be prepared in 8–12 weeks. ISO 27001 typically takes 3–6 months of preparation before Stage 1. Neither is a spreadsheet project.

Step 4

Design controls once

Build the control set against ISO 27001:2022 Annex A, then map to Trust Services Criteria. The Cloud Security Alliance CCM v4 is the canonical crosswalk (CSA, 2023).

Step 5

Publish a Trust Center

Whichever you pick, prospects will still ask for the other. A Trust Center that shows both status lines cuts questionnaire volume by 40–60% in practice.

Run ISO 27001 and SOC 2 side-by-side

ISO-STANDARD.app maps every ISO 27001 Annex A control to the SOC 2 Trust Services Criteria so evidence you gather once satisfies both auditors.

ISO-STANDARD.app ships a ready-to-adopt ISO 27001 workspace with the risk register, controls catalogue, policies and audit-ready exports already wired together — no spreadsheet sprawl, no consultant lock-in.

Start free See pricing Talk to us

Free downloads for this topic

See all 10 free guides & templates →

Prefer a conversation? Email hello@iso-standard.app — a real human responds within one business day.

Frequently asked questions

Is SOC 2 a certification?

No. SOC 2 is an attestation report issued by a licensed CPA firm under AICPA standards; ISO 27001 is a certification issued by an accredited certification body (AICPA, 2022; ISO/IEC, 2022).

Which do enterprise buyers ask for?

US-headquartered buyers most often request SOC 2 Type II; European, UK and international buyers most often request ISO 27001. Selling into both markets means running both.

How much do the controls overlap?

Empirical mapping work by the Cloud Security Alliance and AICPA suggests roughly 80% overlap between SOC 2 Trust Services Criteria and ISO 27001 Annex A controls (Cloud Security Alliance, 2023).

Can one audit cover both?

Some firms offer integrated audits, but the reports are still issued separately under their respective frameworks. Sharing evidence in one workspace is where the real saving comes from.

References

AICPA (2022) Trust Services Criteria for Security, Availability, Processing Integrity, Confidentiality, and Privacy. New York: American Institute of Certified Public Accountants.
Cloud Security Alliance (2023) Cloud Controls Matrix v4 — Mapping to ISO/IEC 27001:2022 and SOC 2. Seattle: CSA.
ISO/IEC (2022) ISO/IEC 27001:2022 Information security management systems — Requirements. Geneva: International Organization for Standardization.

Related guides

Browse all guides →

Trust & security

ISO 27001 aligned

Controls mapped to Annex A

Encryption in transit & at rest

TLS 1.3 · AES-256

MFA enforced

TOTP required for all admins

GDPR & UK GDPR

DPA on request · EU/UK data

SOC 2 ready posture

Audit-grade logging

RLS-isolated tenants

Row-level data separation

← All guidesHome →