ISO 27001 vs SOC 2: choose the assurance your customer needs
ISO 27001 certification concerns an information security management system. A SOC 2 report concerns controls over a defined service system. Ask the customer which assurance they need and what it must cover before choosing.
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Side-by-Side Comparison
| Evaluation Criterion | ISO 27001 | SOC 2 |
|---|---|---|
| Subject | Information security management system | Controls over a defined service system |
| Deliverable | Certificate with a defined scope | CPA assurance report |
| Preparation | ISMS requirements, risk treatment and applicable controls | System description and controls against relevant criteria |
| Decision | Confirm whether the certificate meets the request | Confirm report type, categories and period |
Confirm the recipient's requirement
Ask which product, entity and locations must be covered. Get the required deliverable in writing. A report or certificate with the wrong scope can leave the original request unanswered.
Plan around evidence
Separate preparation, any operating period, auditor fieldwork and report completion. Ask the auditor which records they will need and from which dates. Buying a tool does not establish that a control has been operating.
Budget from the scope
Request a scoped audit quote. Add staff time, remediation, specialist help and software as separate lines. Published cost ranges do not establish the price or effort for your organisation.
Reuse carefully
Existing risk assessments, access reviews and incident records can help. Check each item against the review scope and period. Reuse does not mean two assurance engagements reach the same conclusion.
Choose the sequence
If you need both forms of assurance, discuss a coordinated plan with the relevant auditors. Keep the management-system requirements and the service-control examination distinct.
Making the decision
Choose based on the requested assurance and the scope you need to cover. Use a readiness review to identify missing work, then agree dates and evidence with the auditor. A self-assessment report does not replace either formal outcome.