Best LLM API Providers with Zero Data Retention (ZDR) & Privacy

Zero data retention (ZDR) for LLM APIs means prompts and outputs are not stored after processing, but it differs from data residency, which determines where data is processed and which laws apply; organizations handling sensitive information may require both protections. The discussion compares five European providers—Prem AI, Scaleway, OVHcloud, IONOS, and Regolo AI—on their stated retention practices, deployment models, European hosting, and infrastructure controls. Prem AI emphasizes confidential computing, hardware-based trusted execution environments, and cryptographic attestation alongside ZDR, while Scaleway, OVHcloud, IONOS, and Regolo describe default or stateless retention policies with varying exceptions, logging practices, and levels of regional control. Key evaluation criteria include whether ZDR covers all models and endpoints, contractual guarantees such as DPAs, exclusions for features like agents or file storage, compliance certifications, and deployment options including managed APIs, private clouds, and dedicated infrastructure. The material advises customers to validate claims through signed agreements, audits, certifications, technical verification, and clarification of how providers handle legal requests, security investigations, and changes to services.

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