Most companies facing their first compliance request are not choosing between zero frameworks and one. They are being asked about two or three at the same time.
ISO 27001 vs SOC 2 vs GDPR vs PCI DSS:
ISO 27001 from a European client. SOC 2 from a US prospect. GDPR from their legal team. PCI DSS from their payments integration.
Doing all of them at once is rarely the right answer. The right answer depends on three things: where your clients are, what industry they’re in, and what triggered the request.
ISO 27001 vs SOC 2: Start with where your clients are
This is the question founders ask most often, and it has a simple starting point: geography.
ISO 27001 is the default in European and UK enterprise sales. If your main clients are EU or UK businesses, especially in financial services, healthcare, or the public sector, ISO 27001 is what they expect. It is internationally recognised, independently audited, and certifiable by a third party. The certification covers your whole information security management system, not just one product or team, unless you define a narrow scope on purpose.
SOC 2 is the US enterprise equivalent. If your first big contract is with a US company, especially a SaaS company or one in a regulated US industry, SOC 2 is what their procurement team will ask for. It is an AICPA standard, so it is not internationally certifiable the way ISO 27001 is. But it is well known and widely required in US B2B sales.
There are two types worth knowing:
- SOC 2 Type I checks your controls at a single point in time
- SOC 2 Type II checks your controls over a period, usually six to twelve months, and is what most enterprise clients actually want
The practical takeaway ISO 27001 vs SOC 2: if US enterprise sales are on your roadmap, start your SOC 2 Type II engagement early. Aim for at least twelve months before you expect to need the report. Recent industry benchmarks put a full first-year SOC 2 Type II programme in the tens of thousands of dollars for most B2B SaaS companies. That figure includes audit fees, tooling, and engineering time. Costs scale higher for fintech or larger teams.
GDPR vs ISO 27001: A regulation is not a certification
This is the distinction that trips up the most founders.
You cannot get “GDPR certified” the way you can get ISO 27001 certified. GDPR is a legal obligation, not a certification you apply for. If you process personal data belonging to people in the EU, GDPR already applies to you. The real question is not whether to comply. It’s whether you are compliant, and whether you can prove it if asked.
Here’s the part that helps: ISO 27001 and GDPR overlap heavily in their controls. If you build a proper ISO 27001 system, you will cover a large share of your GDPR technical requirements along the way. But not all of them.
A few things stay GDPR-specific and need to be built separately:
- Your Record of Processing Activities
- Data subject request procedures
- Your breach notification process
If you’re already working toward ISO 27001, treat your GDPR programme as a parallel track. Let it borrow heavily from the same evidence, rather than starting from scratch.
PCI DSS: Does it even apply to you?
PCI DSS applies to a narrow group: companies that store, process, or transmit cardholder data.
Here’s the test that settles it quickly. If your payment flow uses a redirect-only integration, think Stripe, PayPal, or Adyen with hosted fields, cardholder data never touches your systems. In that case, PCI DSS does not apply to you directly.
If you store card data yourself, process it directly, or run a hybrid setup where card data passes through your systems, PCI DSS applies. The level of assessment required then depends on your transaction volume. Lower volumes can usually self-assess with a questionnaire. The highest-volume merchants need an annual on-site audit by a Qualified Security Assessor.
Most B2B SaaS companies using modern payment processors do not need PCI DSS. Fintech companies processing payments directly usually do, often alongside SOC 2 or ISO 27001.
The practical decision table
Here’s how to prioritise based on your actual situation:
| Your situation | Start here |
|---|---|
| Clients are mainly EU or UK based | ISO 27001, with GDPR built alongside it |
| Clients are mainly US based | SOC 2 Type II |
| Selling into both markets | ISO 27001 first for broader geographic coverage, then add SOC 2 in year two |
| You store or process card data directly | Add PCI DSS regardless of the above |
| Card payments go through a hosted redirect (Stripe, PayPal, Adyen) | PCI DSS likely does not apply to you |
ISO 27001 and SOC 2 share a lot of the same control territory: access management, encryption, incident response, vendor oversight. Building one properly tends to make the other faster and cheaper, since you’re reusing most of the same evidence.
So which one do you actually need first?
If you’re only being asked about one framework right now, start there. Don’t pre-build for a request that hasn’t come in yet.
If you’re being asked about two or three at once, that’s increasingly common for Series A and B companies selling across multiple markets. Start with geography as your first filter. Then layer in GDPR, if you handle EU personal data, and PCI DSS, if you touch card data directly, as separate, narrower workstreams.
The biggest mistake we see is companies trying to run all four programmes at once with no sequencing. That’s how compliance projects stall, burn budget, and still leave you unable to answer the one question that actually closed the deal.
How Riskora.io can help
Not sure which framework fits your situation? A 20-minute call usually gives enough clarity to make the decision.
Contact us at support@riskora.io.
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