Backfrom StepFun’s own policies · verified 2026-09-02
StepFun: data residency & retention
Headquarters
🇭🇰 Hong Kong (China)
Where inference runs
US
Platform privacy policy states 'Our servers are located in the United States' for the international StepFun Open Platform (platform.stepfun.ai), operated by STEPFUN TECHNOLOGY (HK) LIMITED — the HK arm of the Shanghai-based StepFun lab; governing law is Hong Kong.
Region pinning
Not disclosed
No residency or region controls mentioned; ToS grants StepFun a worldwide license over prompts, outputs, and API call logs.
Prompt retention
Retained
Policy says StepFun 'may use and retain' API data (prompts, outputs, call logs) for issue analysis and model improvement; no retention window disclosed for prompts (only e.g. IP addresses: 3 years).
Trains on API data
Yes, by default
Explicit: 'StepFun may use Usage Data, including personal data contained in Prompts and Outputs, to train, fine-tune, and improve its artificial intelligence models.' Opt-out only by not participating in the relevant program or negotiating 'alternative arrangements'.
Zero data retention
Not offered
No ZDR offering; ToS suggests contacting StepFun to discuss alternative arrangements.
Compiled from StepFun’s published privacy policy, terms, and documentation on 2026-09-02. “Not disclosed” means StepFun publishes nothing on the point. Policies change without notice, so verify against the sources above before relying on this for compliance decisions.