Security

What we collect, where it lives, who can see it and how we prove it. Figures here are placeholders until Cardinal confirms them.

Your dataPrivate
Training on your dataNever
EncryptionAES-256 at rest, TLS 1.3 in transit
Data regionUS, or EU on request
RetentionDeleted 30 days after you leave
We never train on your data

Cardinal uses your data to work for you and no one else. It never trains shared models, and our model providers are contracted not to train on it either.

  • No training on customer data
  • Zero-retention agreements with model providers
  • You can export or delete everything, any time
Model providersZero retention
OpenAINo training, no retention
AnthropicNo training, no retention
Pen test results

An independent firm tests Cardinal every year. The full report is available under NDA from the trust center.

Penetration test, 2026Independent firm
Critical0
High0
Medium2Fixed
Low5Fixed
Data handling and GDPR

Least access

Each person sees only what they can already see in your CRM.

GDPR ready

A DPA on request, with EU hosting for teams that need it.

Your controls

Admins decide what syncs, what sends and what gets deleted.

Sending safety

Dedicated domains

Sends go from secondary domains, so your main domain stays clean.

Warm-up

New mailboxes ramp over three weeks before plays use them.

Daily limits

Per mailbox and per play, set by you and never exceeded.

Trust centerReports, policies and our sub-processors, in one place.Visit the trust center
Security review

Send us your security questionnaire. We’ll return it with the pen test summary, our DPA and a call with an engineer.

Your reviewIn progress
Questionnaire142 answersDone

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