zdr.dev

AI data retention research and consulting

Zero doesn’t always mean 0

An AI provider’s zero data retention promise can depend on the model, feature, configuration, and agreement. Compare residual retention on the ZDR Rankings board, then work with us to review coverage and prepare for negotiations. For why ZDR matters beyond the marketing claim, read the position paper.

zero data retention (ZDR), n. The claim that an AI endpoint does not keep the prompt, the completion, or other residue of a request after the call finishes. Read the position paper.

Speak to a ZDR expert See ZDR Rankings

33 endpoints · 24 labs on the register

AlibabaZDR 3.0 AnthropicZDR 1.0 AWSZDR 0.5 CerebrasZDR 0.5 CloudflareZDR 3.0 CohereZDR 1.0 DeepSeekZDR 4.0 Fireworks AIZDR 0.5 GoogleZDR 1.0 GroqZDR 0.5 Hugging FaceZDR 3.0 MetaZDR 3.0 MicrosoftZDR 1.0 MiniMaxZDR 4.0 MistralZDR 1.0 MoonshotZDR 4.0 NVIDIAZDR 4.0 OpenAIZDR 1.0 OpenRouterZDR 0.5 PerplexityZDR 0.5 ReplicateZDR 2.0 Together AIZDR 0.5 xAIZDR 0.5 Z.AIZDR 1.0

ZDR Rankings

Sorted by score ascending (0.0 first), then evidence grade strength, then name. Dense rank: equal scores share a rank; the next distinct score takes the next integer. Origin flag shows lab country. Self-host means published weights can run on customer infrastructure; Provider-hosted means API-only. PRC-origin sink is a registry custody view, not this ranking.

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Rank Provider / service Score Lane Hosting License Δ Last verified
1 United StatesAWSBedrock, data_retention_mode:none, non-covered models aws/bedrock · mode:none ZDR 0.5 · A ZDR Self-host open-weight seeded 2026-08-24 (registry)
1 United StatesFireworks AIopen models fireworks/api · open models ZDR 0.5 (f) · B ZDR Self-host open-weight seeded 2026-08-24 (registry)
1 United StatesGroqZDR toggled groq/api · zdr toggled ZDR 0.5 · B ZDR Self-host open-weight seeded 2026-08-24 (registry)
1 United StatesOpenRouterhop, zdr enforced openrouter/api · zdr ZDR 0.5 (f,x) · B ZDR Self-host open-weight seeded 2026-08-25
1 United StatesPerplexityChat Completions / Sonar API perplexity/api · chat completions ZDR 0.5 · B ZDR Provider-hosted proprietary seeded 2026-08-25
1 United StatesxAIZDR toggled xai/api · zdr toggled ZDR 0.5 (r) · B ZDR Provider-hosted proprietary seeded 2026-08-24 (registry)
1 United StatesCerebrasinference API cerebras/api · inference ZDR 0.5 · C ZDR Self-host open-weight seeded 2026-08-24 (registry)
1 United StatesTogether AIserverless default together/api · serverless default ZDR 0.5 (x) · C ZDR Self-host open-weight seeded 2026-08-24 (registry)
2 United StatesAnthropicZDR org, non-covered models anthropic/api · zdr org, non-covered ZDR 1.0 (s,f,r) · A ZDR Provider-hosted proprietary seeded 2026-08-24 (registry)
2 United StatesOpenAIfirst-party API, ZDR approved openai/api · zdr org ZDR 1.0 (s,f,r) · A ZDR Provider-hosted proprietary seeded 2026-08-24 (registry)
2 ChinaZ.AIinternational Model API (api.z.ai), not mainland BigModel z.ai/api · international ZDR 1.0 (s) · A ZDR Self-host open-weight seeded 2026-08-25
2 CanadaCohereSaaS API, ZDR approved cohere/api · zdr ZDR 1.0 (s,r) · B ZDR Provider-hosted proprietary seeded 2026-08-25
2 United StatesGoogleVertex / Gemini Enterprise Agent Platform google/vertex · geap ZDR 1.0 (s,f,r) · B Enterprise Provider-hosted proprietary seeded 2026-08-24 (registry)
2 United StatesMicrosoftAzure OpenAI / Foundry, modified abuse monitoring microsoft/azure-openai · foundry ZDR 1.0 (s,f,h,r) · B Enterprise Provider-hosted proprietary seeded 2026-08-24 (registry)
2 FranceMistralZDR approved mistral/api · zdr approved ZDR 1.0 (f) · B ZDR Self-host open-weight seeded 2026-08-24 (registry)
3 United StatesAnthropicFable 5 / Mythos 5, all platforms anthropic/claude-fable-5 · all platforms ZDR 2.0 (s,h) · A Enterprise Provider-hosted proprietary seeded 2026-08-24 (registry)
3 United StatesAnthropicfirst-party API, default anthropic/api · default ZDR 2.0 (s) · B API default Provider-hosted proprietary seeded 2026-08-24 (registry)
3 United StatesGoogleGemini Developer API, paid tier google/gemini-api · paid tier ZDR 2.0 (f,h) · B API default Provider-hosted proprietary seeded 2026-08-24 (registry)
3 United StatesGroqfirst-party API, default groq/api · default ZDR 2.0 · B API default Self-host open-weight seeded 2026-08-25
3 FranceMistralfirst-party API, default mistral/api · default ZDR 2.0 (f) · B API default Self-host open-weight seeded 2026-08-25
3 United StatesOpenAIfirst-party API, default openai/api · default ZDR 2.0 (f,h) · B API default Provider-hosted proprietary seeded 2026-08-24 (registry)
3 United StatesReplicatePredictions API, not the web UI replicate/api · predictions ZDR 2.0 (f) · B API default Self-host open-weight seeded 2026-08-25
3 United StatesxAIfirst-party API, default xai/api · default ZDR 2.0 · B API default Provider-hosted proprietary seeded 2026-08-25
4 ChinaAlibabaQwen / Model Studio API alibaba/qwen · model studio ZDR 3.0 (f) · B API default Self-host open-weight seeded 2026-08-25
4 United StatesCloudflareWorkers AI API cloudflare/workers-ai ZDR 3.0 (f) · B API default Self-host open-weight seeded 2026-08-25
4 United StatesHugging FaceInference Providers hop huggingface/inference · router ZDR 3.0 (x) · B API default Self-host open-weight seeded 2026-08-25
4 United StatesOpenRouterhop, default routing openrouter/api · default ZDR 3.0 (x) · B API default Provider-hosted proprietary seeded 2026-08-25
4 United StatesMetaMeta Model API meta/model-api ZDR 3.0 · C API default Self-host open-weight seeded 2026-08-24 (registry)
5 United StatesNVIDIAAPI Catalog / hosted NIM trial nvidia/api-catalog · trial ZDR 4.0 (s,x) · A API default Self-host open-weight seeded 2026-08-25
5 CanadaCohereSaaS Platform API, default cohere/api · default ZDR 4.0 (s,h,r,x) · B API default Provider-hosted proprietary seeded 2026-08-25
5 ChinaDeepSeekfirst-party API deepseek/api · first-party ZDR 4.0 · B API default Self-host open-weight seeded 2026-08-24 (registry)
5 ChinaMiniMaxOpen Platform first-party API minimax/api · first-party ZDR 4.0 (s) · B API default Provider-hosted proprietary seeded 2026-08-25
5 ChinaMoonshotKimi API, first-party moonshot/kimi-api · first-party ZDR 4.0 (f) · B API default Provider-hosted proprietary seeded 2026-08-25

Full registry with search

Review the terms for your deployment

We help engineering, security, procurement, and legal teams check ZDR coverage and prepare negotiation requests for their model providers. A scoped review connects the relevant terms to the services you use and the promises you make to customers.

Speak to a ZDR expert Browse the full registry

About these rankings

zdr.dev is an independent public register of zero data retention claims for AI endpoints. The rankings board orders endpoints by residual retention on the ZDR Scale (lower is better). Each dossier cites the published sentences we reviewed. We do not invent scores or Elo ratings.

Open the shareable rankings page · Read our methodology