SOC 2 vs ISO 27001: Which Does Your Business Need?

Both SOC 2 and ISO 27001 prove to customers that you take security seriously, and their underlying controls overlap heavily — but they are not the same thing, and which you need depends on who is asking.

What is SOC 2?

SOC 2 is an attestation report produced by a CPA firm against the AICPA’s Trust Services Criteria (security, plus optionally availability, confidentiality, processing integrity, and privacy). A Type I report assesses control design at a point in time; a Type II assesses how controls operated over a window (commonly 3–12 months). It is the de-facto expectation for US SaaS vendors.

What is ISO 27001?

ISO/IEC 27001 is an international certification of an information security management system (ISMS) — a documented, risk-based program for managing security, audited by an accredited body. It is recognized worldwide and is often expected by European and global enterprise buyers.

Key differences

• Attestation vs certification: SOC 2 yields a report you share under NDA; ISO 27001 yields a public certificate.
• Audience: SOC 2 is US-centric; ISO 27001 carries more weight internationally.
• Focus: SOC 2 evaluates controls against fixed criteria; ISO 27001 certifies that you run a risk-management system.
• Cadence: SOC 2 Type II repeats each observation period; ISO 27001 runs on a three-year cycle with annual surveillance audits.

Which should you pursue?

If your buyers are primarily US SaaS customers, start with SOC 2. If you sell into Europe or to global enterprises, ISO 27001 may open more doors. If you do not yet have a request in hand, SOC 2 Type I is often the fastest first proof point.

Can you do both?

Yes — and most growing companies eventually do. Because the control sets overlap substantially (access management, change control, logging, risk assessment), a well-run program implements once and maps the evidence to each framework, rather than running two separate projects.

RHC Solutions runs compliance and audit-readiness programs from gap assessment to certification, and provides fractional CISO leadership to own the program.