Is Sierra ISO 27001 certified?

Yes

Sierra · Customer support

Yes. Sierra is ISO/IEC 27001 certified for Sierra, 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; Sierra reports ISO/IEC 27001 certification. Ask for scope and current certificate dates before treating it as supplier assurance.
SOC 2: Confirmed; Sierra also reports a SOC 2 attestation, which can complement but does not replace ISO scope evidence.
Default data training: Not verified; Sierra's trust page says data is only used as you instruct and never shared with other customers, but no explicit 'we do not train on your data' statement was found. Verify in the contract and DPA.
Business-tier training: Not verified; No separate business tier was confirmed for this profile.

Practical risk: Sierra is ISO 27001 and 42001 certified, lists SOC 2 and HIPAA as maintained standards, and publishes a subprocessor list. Much of the granular detail (no-training commitment, retention, BAA, EU residency, SSO) sits behind a gated trust center and per-customer DPA.

How to make a decision

Check the precise account tier, written contract and intended data before approving Sierra. 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 Sierra

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

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