SOC 2 got you in the door. Europe wants ISO 27001 too.

The pattern repeats every quarter now. A 60-person B2B company earns its SOC 2 Type II, closes two US enterprise deals with it, and then the first serious European prospect shows up. Their security review doesn't ask for SOC 2. It asks for ISO 27001, and the deal team learns in real time that the certificate that opens doors in Boston doesn't open them in Berlin.

This isn't procurement being difficult. It's two markets with two defaults, and in 2026 the pressure to hold both went from occasional to structural.

Do you need both SOC 2 and ISO 27001?

The honest decision tree is short:

• You sell only into the US. SOC 2 Type II remains the answer. Nobody in a US mid-market deal is asking for ISO 27001 first.
• You sell into the EU or UK, or your customers do. ISO 27001 is the default ask. European buyers treat it the way US buyers treat SOC 2: the ticket that gets you past the first screen.
• You sell into both, or plan to within 18 months. You'll end up with both, and the only real question is whether you build them as one program or pay for two.

There's a third pull worth naming: security reviews flow downhill. ISC2's supply chain research found 77% of organizations put SOC 2, ISO 27001, or NIST at the top of their vendor evaluation requirements. When Verizon's Data Breach Investigations Report measured third-party involvement in breaches doubling year over year, every procurement team read the same memo, and the questionnaires got longer for everyone.

Why 2026 moved this from nice-to-have to default

NIS2, the EU's network and information security directive, stopped being a lawyer's briefing note and became an operational reality this year: national regulators moved from an educational posture into active supervision and audits. Here's why that reaches you even without an EU entity. NIS2 makes covered companies responsible for their supply chain, so they push the obligations down contractually. A regulated EU customer can't prove their own compliance without evidence from their vendors, and the evidence format they recognize is ISO 27001.

If you're a US or LATAM company selling software or services into Europe, you won't be regulated by NIS2 directly. You'll be asked to behave as if you were, by customers who are.

Can you reuse SOC 2 evidence for ISO 27001?

Mostly, yes, and this is where the economics turn in your favor. Compliance-platform analyses consistently put the control overlap between SOC 2 and ISO 27001 at roughly 70 to 80%. Access management, encryption, logging, incident response, vendor management, business continuity: one control, one piece of evidence, two frameworks satisfied. If you're already collecting evidence continuously for SOC 2, most of the ISO work is mapping, not building.

The delta is real but bounded. ISO 27001 asks for a management system, not just controls: a written risk assessment methodology, a Statement of Applicability covering the Annex A controls, internal audits, and management reviews with minutes. It's paperwork with a purpose (it forces the security program to have an owner and a heartbeat), but it's structure around what you already do, not a second security program.

In the programs we've seen, a company with a live SOC 2 Type II program reaches ISO 27001 certification in roughly 4 to 6 months. Starting from zero, the same certification is a 12-month project. The overlap is the discount.

The efficient order of operations

1. Map before you buy. Take your existing SOC 2 control set and map it against ISO 27001 Annex A. The gap list, not a vendor's pitch, tells you the real scope.
2. One evidence pipeline. Whatever you use for continuous monitoring, point both frameworks at the same evidence. Two audit trails is how dual compliance doubles in cost.
3. Build the ISMS layer once. Risk register, Statement of Applicability, internal audit cadence. Write them so your future frameworks (HIPAA, PCI DSS 4.0, the EU AI Act) plug into the same system.
4. Sequence the audits. Schedule the ISO certification audit and your SOC 2 renewal into one evidence-collection window. Your team answers each question once a year instead of twice.
5. Tell sales. A certificate nobody mentions in deals is a cost center. Both badges belong in your trust center and your security questionnaire answers from day one.

The dual-framework question is a revenue question: it decides which markets your pipeline can enter. It's also exactly the kind of work our Secure practice runs, and if the SOC 2 half is the part you're missing, our SOC 2 Sprint is the productized version with a fixed scope. Where security sits among your eight dimensions is what the DGTL Readiness Index is for.

Related: SOC 2 without the pain → · GDPR for B2B, practically → · AI governance for B2B →