ISO 27001 vs SOC 2: Which Should You Do First?
If you're running a B2B software or services company and your enterprise customers are asking for certifications, you've probably asked yourself: should we pursue ISO 27001 or SOC 2 first? Both frameworks require significant time and resources. Getting the order wrong could mean months of wasted effort. The good news is that the decision isn't as complicated as it seems—and your choice depends on who's asking.
Most founders and security leaders don't realize that ISO 27001 and SOC 2 are fundamentally different. One is a formal certification; the other is an audit report. One focuses on your entire information security management system; the other is customer-specific and time-limited. Understanding these differences will show you which one your market actually needs—and which one to do first.
What ISO 27001 Actually Is
ISO 27001 is a formal, internationally recognized certification issued by accredited auditors. It verifies that you've built and maintain a documented information security management system (ISMS) that meets a global standard.
When you pass an ISO 27001 audit, you receive a certificate valid for three years. During that time, you'll undergo annual surveillance audits to confirm you're still compliant. The framework itself covers 114 controls across topics like access control, cryptography, incident response, supplier management, and security awareness.
To get ISO 27001, you must:
The timeline is usually 6–12 months from start to certificate, depending on your starting point and the complexity of your operations. The cost typically ranges from £15,000 to £50,000+, not including the internal effort to implement controls.
Because ISO 27001 is internationally standardized and recognized by regulators in EU countries (especially under GDPR frameworks), it's the credential that companies use across multiple sales conversations and markets.
What SOC 2 Actually Is
SOC 2 is not a certification—it's an audit report. A qualified auditor examines your controls in five trust service categories (security, availability, processing integrity, confidentiality, and privacy) and issues a report attesting to how well you've designed and operated those controls during a specific time period.
SOC 2 reports are valid for one year from the audit date. Customers typically ask to see a report dated within the last 12 months. There's no "certificate"—just the audit report itself, which you can share with prospects under NDA or publish on your trust page.
There are two types of SOC 2 reports:
Most enterprise customers ask for SOC 2 Type II because it proves you haven't just documented controls on paper—they actually work in practice.
SOC 2 reports cost between £5,000 and £25,000 depending on scope and audit complexity. The timeline to a Type II report is typically 8–12 months from when you decide to start (including the observation period).
The Key Difference: Scope and Geography
Here's where the decision becomes clear: ISO 27001 covers your entire organization and is recognized globally; SOC 2 is typically customer-focused and primarily valued in North America.
If your customers are spread across multiple countries and regions, or if you're selling to European enterprises or operating in regulated industries like healthcare or finance, ISO 27001 carries more weight. Many European and UK buyers specifically ask for ISO 27001. Some government and regulated customers won't even consider a vendor without it.
If the vast majority of your customers are in the US and Canada, and they're asking "do you have SOC 2?", then SOC 2 is what you need first.
The second key difference is effort. ISO 27001 requires you to build and document controls across your entire business. SOC 2 can be scoped more narrowly—you can define the "system under audit" to cover just your SaaS platform, your data processing operations, or your customer-facing services. This means you can sometimes pursue SOC 2 faster because you're auditing a smaller surface area.
However, there's a third dimension: many customers accept SOC 2 as a substitute for ISO 27001, but not vice versa. A buyer asking for ISO 27001 usually won't accept "we have SOC 2 instead." A buyer asking for "a security audit" or compliance credential might accept either.
Which Should You Do First?
The answer depends on three things:
1. What Are Your Customers Asking For?
Pull your last 20 customer deals and RFPs. Make a list of every security or compliance question. What do they specifically request? If 80% say "SOC 2," do SOC 2 first. If it's split between ISO 27001 and SOC 2, or if your UK and EU customers are asking specifically for ISO 27001, do ISO 27001 first.
If customers aren't asking for either yet, but you know they will soon (because you're pursuing larger enterprise deals), you need to make a bet on your market. North American-focused: SOC 2. Multi-geography or European: ISO 27001.
2. Do You Have a Documented Security Program?
If you have virtually no documented policies, incident response procedures, or formal access controls in place, ISO 27001 will actually be easier to do first. Here's why: you're going to have to build these things anyway. The ISO 27001 framework gives you a complete template and checklist of what needs to exist. You implement everything, document it, and an auditor verifies it.
SOC 2 assumes you've already built some controls and just need them audited. If you're starting from zero, you'll spend months guessing which controls matter for SOC 2 scope, then end up having to build them anyway for ISO 27001 later.
3. What's Your Budget and Timeline?
If you have 6 months and a tight budget, SOC 2 Type II might be faster because you can narrow the scope to just your product and data handling operations. If you have 12 months and want a credential that unlocks enterprise sales across multiple geographies, ISO 27001 is the better bet.
The Practical Path Forward
Here's how most companies should think about it:
If you're primarily selling to North American customers: Do SOC 2 Type II first. It's what they'll ask for, it can be scoped tightly to your product operations, and it's faster than ISO 27001. Once you have SOC 2, add ISO 27001 later if you start selling internationally.
If you're selling globally or you know European/UK customers are part of your pipeline: Do ISO 27001 first. Yes, it's more comprehensive, but you're building a foundation that serves multiple markets. Once you're certified, a SOC 2 audit becomes much simpler because your controls are already documented and operating.
If you're starting from scratch with no security program: Build your program to ISO 27001 standards first, even if customers aren't asking for it yet. The framework is comprehensive and internationally recognized. Once your program is built and audited, getting SOC 2 later takes half the effort because the controls already exist.
How to Avoid Wasted Effort
Before you commit to either path, do this:
Once you've made the decision, the work begins: drafting policies, documenting procedures, gathering evidence, and preparing for audit. This is where many teams stumble—not because the standards are hard to understand, but because the logistics of collecting evidence and managing all the documentation becomes chaotic.
Tools like Korrali Trust can streamline the heavy lifting: answer security questionnaires in minutes by pulling from your policy library, generate SOC 2 and ISO 27001 policy documents directly, and organize evidence in one place so you're not hunting through email and spreadsheets during audit preparation. This won't replace the audit itself, but it takes the administrative burden out of the process so your team can focus on what actually matters: building and demonstrating that your controls work.
Conclusion
ISO 27001 vs SOC 2 doesn't have to be a guessing game. ISO 27001 is a comprehensive, globally recognized certification that gives you credibility across multiple markets. SOC 2 is a customer-focused audit report that's particularly valuable in North America and can sometimes be completed faster.
Choose based on your customers' geography and what they're asking for. If they want SOC 2, do that first. If they want ISO 27001, or if you're selling internationally, start there. If you have no security program yet, ISO 27001 gives you the clearest roadmap.
The real cost isn't the audit fee—it's the months you'll spend documenting, implementing, and gathering evidence. Get the order right from the start, and you'll avoid months of wasted effort. Start your free trial at [trust.korrali.com](https://trust.korrali.com) to organize your evidence and begin preparing for whichever certification your market needs first.