Do I need both SOC 2 and ISO 27001?
Usually not at first. Most US startups start with SOC 2 to close deals; ISO 27001 matters more for international or enterprise buyers. Many companies eventually hold both because auditors can reuse overlapping evidence.
The full answer
The two frameworks overlap heavily but serve different audiences. SOC 2 is an AICPA attestation used mostly in North America; enterprise security questionnaires commonly ask for a SOC 2 Type 2. ISO 27001 is an international management-system certification that European, Middle Eastern, and Asian buyers often expect. If all your prospects accept SOC 2, you may never need ISO 27001.
Cost is a real factor. SOC 2 audits booked through the AuditNex network start at $2,500 promotional and average about $5,000, per the AuditNex 2026 rate card. ISO 27001 Stage 1 plus Stage 2 certification audits run roughly $14,000 to $50,000 for small and mid-size companies, with annual surveillance audits of about $3,000 to $10,000, per OneTrust and StrongDM 2025 cost guides. Doing both means funding both cycles.
The upside of holding both is efficiency. Evidence for encryption, access control, vendor management, and incident response satisfies requirements in each framework, so the second audit reuses much of the first year's work. Start with the framework your pipeline demands, then add the other when a deal actually requires it.
To decide, map active and target deals to the framework each buyer names, then scope accordingly. If you are unsure, get a quote for SOC 2 first and add ISO 27001 later.
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Related questions
Can one audit firm do SOC 2 and ISO 27001 together?
Often yes, if the firm holds both a CPA license for SOC 2 and ISO 27001 accreditation, or partners with an accredited certification body. Many providers now run a combined audit that shares evidence and fieldwork to save time.
Do government buyers accept SOC 2?
Sometimes. State and local agencies and government contractors often accept a SOC 2 Type 2, but most federal cloud work requires FedRAMP, and defense contracts increasingly require CMMC. SOC 2 helps, yet rarely replaces those government-specific programs.
Does PCI DSS overlap with SOC 2?
Yes, they share many technical controls — access management, encryption, logging, and vulnerability management — but they don't substitute for each other. PCI DSS is a prescriptive, mandatory standard for handling cardholder data; SOC 2 is a flexible CPA attestation.
Does SOC 2 cover AI and LLM features?
Yes, indirectly. SOC 2 has no AI-specific criteria, but its technology-neutral Trust Services Criteria cover any system in your defined scope — including AI and LLM features — for security, availability, confidentiality, processing integrity, and privacy.
Does SOC 2 help with GDPR?
Partly. SOC 2 is not a GDPR certification, but a report with the confidentiality and privacy criteria demonstrates many security safeguards the GDPR expects. You still need GDPR-specific steps like lawful basis, data subject rights, and processing agreements.
Does SOC 2 satisfy HIPAA?
No. SOC 2 is a voluntary AICPA attestation; HIPAA is US federal law for protected health information. A SOC 2 report can show strong security controls, but it does not prove HIPAA compliance or replace a HIPAA risk assessment.
Sources: AuditNex network rate card, 2026; OneTrust and StrongDM ISO 27001 cost guides, 2025. Answer written and maintained by the AuditNex research team; last reviewed July 26, 2026. AuditNex is a marketplace — accredited firms price and scope engagements independently.