Is Grammarly ISO 27001 certified?

Yes

Grammarly, Inc. · Writing

Yes. Grammarly, Inc. is ISO/IEC 27001 certified for Grammarly, the international information-security management standard.

What we checked

This assessment separates the consumer product from any business plan. It uses the vendor documents linked below; an unverified item is not a pass.

ISO/IEC 27001: Confirmed; Grammarly, Inc. reports ISO/IEC 27001 certification. Ask for scope and current certificate dates before treating it as supplier assurance.
SOC 2: Confirmed; Grammarly, Inc. also reports a SOC 2 attestation, which can complement but does not replace ISO scope evidence.
Default data training: Opt-out required; Grammarly does not let LLM providers train on user content, but uses aggregated, de-identified samples for product improvement and training unless the user opts out via account controls.
Business-tier training: No by default; Grammarly Business/Enterprise content is not used to train models and EU/UK user content is explicitly excluded from model training.

Practical risk: On free/Premium consumer tiers Grammarly uses de-identified content for product improvement/training unless you opt out, and HIPAA coverage requires an Enterprise BAA (not available on Free/Premium/Business).

How to make a decision

Check the precise account tier, written contract and intended data before approving Grammarly. A security certification, DPA or setting can apply to only part of a vendor's service. Keep the source links with your supplier review and revisit them when the vendor changes its terms.

More on Grammarly

Is Grammarly HIPAA compliant?Is Grammarly GDPR compliant?Is Grammarly SOC 2 compliant?Does Grammarly train on your data?

See the full Grammarly risk profile, with every data-handling fact and its source, or browse all rated AI tools.