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NIS2 vs ISO 27001

NIS2 is a binding EU legal regime implemented through national law; ISO 27001 is a voluntary information-security management-system standard and certification framework.

Quick answer

NIS2 is a binding EU legal regime implemented through national law; ISO 27001 is a voluntary information-security management-system standard and certification framework.

What this means

The two are related but different. NIS2 places mandatory duties on in-scope entities in specific sectors, enforced by national authorities. ISO 27001 is a standards-body certification covering an information security management system (ISMS). ISO 27001 supports security governance but does not by itself establish NIS2 compliance.

Key considerations

Legal force: NIS2 is implemented in national law and is binding on covered entities; ISO 27001 certification is voluntary.

Certification: ISO 27001 is certified by accredited bodies; NIS2 compliance is assessed by national competent authorities.

Relationship: An ISO 27001 ISMS is a strong foundation, but directive-specific duties — scope, incident reporting, enforcement — still have to be met separately.

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Frequently asked questions

Does ISO 27001 certification mean I am NIS2 compliant?

No. It shows a certified management system, which supports but does not prove NIS2 compliance; you still need the directive-specific obligations under national law.

Which should come first?

Start with a scope and gap assessment under the applicable national law, then build the ISMS and close NIS2-specific gaps.

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