ISO 27001 vs SOC 2: which should you do first?
Choose by buyer geography. If your pipeline is mostly US enterprise, start with SOC 2. If it is Europe, the UK, APAC or India, start with ISO 27001. If it is genuinely split, start with the framework the largest blocked deal requires, and map both onto one control library so the second costs far less than the first.
The decision is commercial, not technical
Teams often debate which framework is more rigorous. That is the wrong question. Both are credible. The right question is which one unblocks revenue soonest, because compliance is a sales enabler before it is a security programme.
Side by side
| SOC 2 | ISO 27001 | |
|---|---|---|
| Deliverable | Attestation report | Certificate |
| Recognised in | Primarily United States | Europe, UK, APAC, India, global |
| Time to first output | 1 to 3 months (Type 1), longer for Type 2 | 3 to 6 months to Stage 1 |
| Renewal | Annual audit | 3-year cycle plus annual surveillance |
| Governance overhead | Lower | Higher: internal audit and management review are mandatory |
Start with SOC 2 if
- Your buyers are US-based and their security questionnaires name SOC 2
- You need something in a buyer's hands within a quarter
- You have limited governance maturity and want the lighter starting point
Start with ISO 27001 if
- You sell into Europe, the UK, APAC or Indian enterprises
- You are responding to tenders that name ISO 27001 explicitly
- You want a three-year certificate rather than an annual audit cycle
- A parent company or investor requires a recognised international standard
How to avoid paying twice
The control overlap between the two is large. Access control, change management, risk assessment, vendor oversight, incident response and logging serve both.
The cost trap is running them as separate projects with separate evidence collection, or on platforms that charge a per-framework licence fee. On a unified control library, adding the second framework is largely a mapping and gap exercise rather than a second full programme.
Watch the per-framework fee
- Major platforms commonly charge $3,000 to $15,000 to add a second framework.
- Ask specifically what the second framework costs before signing, not at renewal.
Key takeaways
- Pick by buyer geography, not by which standard sounds stronger.
- SOC 2 is faster to a first deliverable; ISO 27001 gives a longer-lived certificate.
- Control overlap is large, so the second framework should cost far less than the first.
- Confirm per-framework pricing before you sign anything.
Frequently asked questions
Can we do both at once?
Yes, and it is often efficient because the evidence overlaps. It does require more coordination up front and a realistic view of internal bandwidth.
Will a US buyer accept ISO 27001 instead of SOC 2?
Sometimes, particularly if paired with a security questionnaire and a trust page. Many US procurement teams still specifically request SOC 2.
Does ISO 27001 cover GDPR?
No. It supports GDPR by establishing security controls, but GDPR has separate legal obligations such as lawful basis and data subject rights.
Which is cheaper?
First-year totals are broadly comparable. ISO 27001 spreads cost over a three-year cycle; SOC 2 repeats annually.
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