If your SaaS company is starting to feel pressure to get compliant, you've probably run into the two names that dominate the conversation: SOC 2 and ISO 27001. They get mentioned in the same breath, they overlap heavily, and picking the wrong one first can cost you months and thousands of dollars. This post explains what actually separates them and how to decide which one your company needs.
The Quick Answer
For most US-based SaaS companies selling to US customers, SOC 2 is the right place to start. It's what your prospects' security teams will ask for by name. If you sell into European or international markets, or your enterprise buyers specifically request it, ISO 27001 becomes the priority instead. Plenty of companies eventually pursue both, and because the controls overlap so much, the second certification costs far less than the first.
Now the detail behind that.
What Each One Actually Is
SOC 2 is an attestation report, not a certification. An independent CPA firm examines your controls against the Trust Service Criteria defined by the AICPA and issues a report describing how well those controls are designed and operating. Buyers read that report to decide whether to trust you with their data. For a full breakdown, see our SOC 2 compliance checklist for SaaS companies.
ISO/IEC 27001 is an international certification standard for an Information Security Management System, or ISMS. An accredited body audits your ISMS against the ISO/IEC 27001 requirements and, if you pass, issues a certificate recognized worldwide. Our guide to ISO 27001 certification for enterprise SaaS walks through the process in depth.
The Differences That Actually Matter
Market and Geography
This is the single biggest deciding factor. SOC 2 is the standard buyers expect in North America. ISO 27001 is the globally recognized standard and is expected across Europe, the UK, Asia, and Australia. Follow your customers. Whichever one your target buyers ask for is the one you need.
Certificate vs Report
ISO 27001 gives you a clean, recognizable certificate that is easy to display and instantly understood internationally. SOC 2 gives you a detailed report that a prospect's security team reads closely. A certificate is simpler to communicate. A report gives sophisticated buyers more to evaluate.
Type I vs Type II (SOC 2 only)
SOC 2 comes in two forms. Type I assesses whether controls are properly designed at a single point in time. Type II assesses whether they operated effectively over a period, usually three to twelve months. Most enterprise buyers want Type II. ISO 27001 has no equivalent split. It's a single certification with ongoing surveillance audits.
Cost and Timeline
Both require similar upfront effort to build the program. SOC 2 Type II typically takes three to six months of preparation plus the observation window, with independent audit fees often running $10,000 to $40,000 or more. ISO 27001 typically takes four to eight months, with audit fees often in the $15,000 to $45,000 range, plus annual surveillance audits and a full recertification every three years. In both cases the larger cost is the internal effort of building and running the controls, which is where a vCISO compresses the timeline.
The Overlap
SOC 2 and ISO 27001 share a large percentage of their underlying controls: access management, change management, risk assessment, vendor management, and incident response. If you build a solid program for one, you're most of the way to the other. That's why companies that want both should sequence them rather than start each from scratch.
If SOC 2 is your starting point, our checklist shows exactly what to have in place before the audit. Get the checklist (PDF).
How to Choose
Work through these in order.
- Where are your customers? US-only points to SOC 2. International or Europe-heavy points to ISO 27001.
- What are prospects actually asking for? Check your stalled deals and security questionnaires. The framework named there wins.
- What's the nearest revenue? Pursue the certification that unblocks the biggest deal in your pipeline first.
- Do you need both eventually? If so, start with the one your market demands, then add the second on top of the shared control base.
A typical scenario: A Series A SaaS company serving both US and EU customers is unsure where to start. If its three largest open deals are all US enterprises asking for SOC 2 Type II, the sensible move is to pursue SOC 2 first to unblock immediate revenue, build the ISMS documentation in parallel, and add ISO 27001 the following year at a fraction of the incremental cost.
The Mistake to Avoid
Don't pick a framework because it sounds more impressive, and don't try to do both from a standing start at the same time. Running them in parallel from zero doubles the effort and slows down the certification that is actually blocking revenue. Let your customers and pipeline decide, build the shared foundation once, and expand from there.
Not sure which path fits your company? Contact SecurePath Security for a free consultation. Our CISSP-certified team helps SaaS companies across the DC, Maryland, and Virginia region and nationwide choose the right framework and get certified without the guesswork. You can also explore our SOC 2 and ISO 27001 services to see how we run these engagements.