🛡️ What is Zero Data Retention?

ZDR-compliant endpoints process your AI requests without storing any data. This means:

• No prompt logging or training data usage
• No conversation history retention
• Maximum privacy for sensitive data
• Ideal for confidential business information, personal data, or sensitive research

Note on Caching: In-memory caching of prompts is typically not considered "retaining" data (or it is at least of a very different nature than organizations that log prompts, write them to databases, or even use them for additional training or publish prompts). This keeps repeated prompt data in an in-memory cache in the provider's datacenter so that the repeated part of the prompt does not need to be re-processed, leading to considerable cost savings. OpenRouter's stance is that in-memory caching is compatible with ZDR, and therefore allows endpoints/models with implicit caching to be hit when a ZDR routing policy is in effect. If you need complete non-retention (no caching), use the "No Caching" filter.

Read OpenRouter's official ZDR policy →

⚠️ Disclaimer

I have not personally audited this list. This catalog relies on OpenRouter's research and public documentation. While I strive to maintain accurate information, always verify ZDR compliance directly with providers before handling sensitive data.