ISO 27001 and SOC 2 are the two dominant information security frameworks for technology companies. Both demonstrate that you take security seriously. But they are not interchangeable — they serve different customers, different geographies, and different business goals. Choosing the wrong one first can cost you months of rework.
The Core Difference
ISO 27001 is an international management system standard published by ISO. It results in a certificate issued by an accredited certification body, recognised globally. SOC 2 is an American audit framework governed by the AICPA. It results in a Type I or Type II report issued by a licensed CPA firm.
The certificate vs. report distinction matters enormously in practice.
When Customers Ask for ISO 27001
Your customers are most likely to require ISO 27001 if they are:
- Based in Europe, the Middle East, Asia-Pacific, or Latin America
- Enterprise organisations with formal vendor risk management programmes
- Government, defence, or regulated industry entities
- Companies that have themselves pursued ISO 27001 certification
ISO 27001 is the global default. Outside North America, it is often the only certification enterprise procurement teams accept.
When Customers Ask for SOC 2
SOC 2 is the dominant framework in North America, particularly for SaaS companies selling to:
- US enterprise technology and financial services companies
- US healthcare organisations subject to HIPAA
- Venture-backed startups on the standard SaaS sales motion
For US-focused companies on the standard SaaS sales cycle, SOC 2 Type II is often the first and fastest path to enterprise deals.
Key Differences at a Glance
- Outcome: ISO 27001 = certificate | SOC 2 = audit report
- Auditor: ISO 27001 = accredited certification body | SOC 2 = licensed CPA firm
- Scope: ISO 27001 = prescriptive control set (Annex A) | SOC 2 = Trust Services Criteria (customisable)
- Geography: ISO 27001 = global | SOC 2 = primarily North America
- Renewal: ISO 27001 = 3-year cycle with annual surveillance | SOC 2 = annual report
- Timeline: ISO 27001 = typically 6–12 months | SOC 2 Type II = typically 6–9 months
Can You Pursue Both?
Yes — and most enterprise-grade companies eventually do. The good news: there is significant control overlap between ISO 27001 and SOC 2. A well-designed compliance programme can satisfy both frameworks with approximately 70% shared controls. Start with whichever your most important customer requires, then layer the second framework on top of your existing programme rather than rebuilding from scratch.
The Decision Framework
Answer these three questions:
- Where is your primary customer base? (US → SOC 2 first, elsewhere → ISO 27001 first)
- What does your largest current prospect require? (Match their requirement)
- Where do you plan to expand in 18 months? (Build toward that geography now)