Open-source privacy proxy masks PII before prompts reach external AI services

Open-source privacy proxy masks PII before prompts reach external AI services
Dataiku has released Kiji Privacy Proxy, an open-source local gateway that detects and masks personally identifiable information in requests before they are sent to external AI APIs. The tool performs local PII detection with a quantized DistilBERT model (ONNX Runtime), substitutes realistic dummy values, forwards masked requests to providers like OpenAI and Anthropic, and restores original values in responses to preserve application behavior. #KijiPrivacyProxy #Dataiku

Keypoints

  • Kiji Privacy Proxy detects and masks 16+ categories of PII before requests leave the network.
  • The proxy sits between local applications and external AI APIs such as OpenAI and Anthropic to intercept traffic.
  • PII detection runs locally on a quantized DistilBERT model via ONNX Runtime with under 100 ms latency and ~94% F1.
  • Distribution includes a macOS Electron app, a Linux server binary, and a Chrome extension for browser routing.
  • The tool helps address compliance obligations under GDPR, HIPAA, and CCPA and is available free on GitHub.

Read More: https://www.helpnetsecurity.com/2026/05/01/open-source-pii-privacy-proxy/