SOC 2 vs. ISO 27001: Which Does Your Business Actually Need?
If a customer or prospect has ever asked whether you’re “SOC 2 compliant” or “ISO certified,” you’ve run into one of the most common sources of confusion in security compliance. The two frameworks overlap heavily, and they’re often treated as interchangeable, but they were built for different purposes and different audiences.
The real question isn’t which framework is “better.” It’s which one your customers and your market expect you to have. Here’s how to decide.
What SOC 2 is, in plain terms
SOC 2 (System and Organization Controls 2) is a reporting framework developed by the American Institute of Certified Public Accountants (AICPA). It evaluates how a service organization manages data based on five Trust Services Criteria: Security, Availability, Processing Integrity, Confidentiality, and Privacy.
There are two types of SOC 2 reports, and the distinction matters:
- Type I evaluates the design of your controls at a single point in time.
- Type II evaluates whether those controls operate effectively over a defined period, usually three to twelve months.
SOC 2 is especially common among SaaS providers, cloud platforms, and any business that handles sensitive customer or partner data, particularly in the United States.
What ISO 27001 is, in plain terms
ISO 27001 is an international standard for information security management. Rather than producing an attestation report, it certifies that your organization has built and operates a full Information Security Management System (ISMS), spanning risk assessments, documented policies, and internal audits.
The output is a certificate issued by an accredited certification body, recognized internationally. Where SOC 2 produces a report you share under NDA, ISO 27001 produces a credential you can point to.
The practical differences
| SOC 2 | ISO 27001 | |
|---|---|---|
| Origin | US / AICPA | International / ISO |
| Output | Attestation report | Certification |
| Built around | Trust Services Criteria | An ISMS (management system) |
| Commonly requested by | US SaaS buyers, enterprise procurement | International and EU customers |
| Format | Report shared under NDA | Publicly verifiable certificate |
How to choose
The decision usually comes down to where your customers are and what they ask for in procurement:
- Mostly US customers, especially SaaS: SOC 2 is typically the first move. It’s what enterprise buyers’ security questionnaires ask for.
- International customers or an EU presence: ISO 27001 carries more weight and is more widely recognized outside the US.
- Selling up-market or into both regions: Many organizations end up pursuing both, because that’s what their largest deals require.
You don’t always have to pick just one
Here’s the part most comparisons miss: SOC 2 and ISO 27001 share a large amount of underlying control work. A single, well-designed control program can support both frameworks at once, which means the second certification is far less work than the first if you plan for it.
At SRG, our compliance work includes custom framework mapping and crosswalks precisely so you aren’t building two separate programs to satisfy two overlapping standards. The goal is one set of real controls that satisfies whichever frameworks your market demands.
Not sure which fits your business?
Choosing between SOC 2 and ISO 27001, or sequencing both, depends on your customers, your industry, and your growth plans. If you’d like help mapping the right path, explore our Compliance and Regulation services or get in touch and we’ll help you figure out which one your market actually expects.