Claude (Free/Pro) — privacy & data policy

Provider: Anthropic. PromptPrivacy score: 59/100. Last verified August 26, 2026.

What happens to your data?

Anthropic collects your account information, conversations, uploaded files, and usage diagnostics to operate Claude and train its AI models. Your content may be shared with vendors, affiliates, or third-party integrations you connect to the service. You can opt out of training in your account settings and delete conversations, which are permanently cleared from backend systems within 30 days.

Does it train on your data?

User inputs and outputs are used to train and improve Anthropic's AI models by default on Free and Pro tiers, unless the user opts out in account settings. Even with an opt-out in place, data may still be used if conversations are flagged for safety review or explicitly submitted via feedback mechanisms.

Can you opt out?

Yes, you can opt out of having your inputs and outputs used for model training via your account privacy settings, as well as opting out of targeted advertising.

Data retention

Personal data is retained as long as reasonably necessary to provide the services, comply with legal requirements, and fulfill the purposes outlined in the policy. When you delete individual conversations, they are immediately removed from your history and automatically deleted from backend systems within 30 days.

Encryption & security

Not specified in detail; the policy broadly mentions that Anthropic implements appropriate technical and organizational security measures to protect personal data from loss, misuse, and unauthorized access, alteration, or destruction.

Is it safe for work?

Use with caution for confidential or sensitive company data: free and pro tiers train models on user inputs by default unless opted out, and business-grade data protection terms are restricted to Anthropic's Enterprise offerings.

Source policy: https://www.anthropic.com/legal/privacy