SOC 2 vs ISO 27001
Both are security frameworks, but they serve different purposes. SOC 2 is a US audit standard for SaaS companies. ISO 27001 is an international management system certification. Here's how to choose
SOC 2
An attestation report issued by a licensed CPA firm. Proves your controls work over time. The de facto standard for U.S. SaaS and cloud companies.
- U.S.-centric
- Annual report
- Flexible scope (TSC)
- Shared under NDA
ISO 27001
A formal certification issued by an accredited body. Establishes a comprehensive Information Security Management System (ISMS). The global gold standard.
- Globally recognized
- 3-year certification
- Full ISMS scope
- Publicly shareable
Side-by-side comparison
| Feature | SOC 2 | ISO 27001 |
|---|---|---|
| Origin | AICPA (US) | ISO/IEC (International) |
| Who needs it | SaaS vendors | Enterprise, EU-facing companies |
| Certification type | Audit report (Type I/II) | Formal certification |
| Typical cost | Varies by scope (request a proposal) | Varies by scope (request a proposal) |
| Timeline | 3–6 months | 8–10 months |
| Auditor type | Licensed CPA firm | Accredited CB (certification body) |
| Renewal | Annual | 3-year certificate with annual surveillance audits |
| Best for | US market access, RFPs | ISO mandates |
Which framework do you need?
Choose SOC 2 if…
- Your buyers are primarily U.S.-based enterprise companies
- Prospects are requesting a SOC 2 report during security reviews
- You need to demonstrate control effectiveness over time (Type II)
- You're a SaaS or cloud-native company with a defined system boundary
- You want flexibility in which Trust Services Criteria to include
Choose ISO 27001 if…
- You sell to international or European customers
- Prospects require ISO 27001 certification (not just a report)
- You need a management system that covers your entire organization
- Regulatory or contractual obligations mandate ISO 27001
- You want a publicly shareable certificate for marketing and trust
Choose both if…
- You serve both U.S. and international markets
- Enterprise customers require both SOC 2 and ISO 27001
- You want to maximize control reuse across frameworks
- You need a unified compliance program that scales
~80% control overlap
SOC 2 and ISO 27001 share approximately 80% of their control requirements. Companies pursuing both frameworks can leverage shared controls, evidence, and documentation to reduce cost and timeline by 20–30%.
Shared controls include
- Access control and identity management
- Change management and SDLC
- Incident response and monitoring
- Risk assessment and treatment
- Vendor and third-party management
- Business continuity and disaster recovery
- Security awareness and training
3FACTOR's dual-framework approach
- Unified control matrix mapping both frameworks
- Single evidence collection process, no duplication
- ISO 27001 ISMS as the foundation, SOC 2 as evidence layer
- Coordinated audit timelines to minimize disruption
- 20–30% cost reduction vs pursuing separately
Frequently Asked Questions (FAQs)
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