NMB Shadow

What it does

Intercepts sensitive PII and Credentials locally before submitting to AI chatbots. Protect your company's most sensitive data from accidental AI exposure. NMB Shadow (by NoMoreBreach) acts as a local security layer that sits between your browser and AI chatbots. It automatically detects and intercepts sensitive information in real-time before it ever leaves your machine.

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  Local Privacy Firewall-blocks PII and secrets before ChatGPT sees themDec 2025 · github.com · ▲111

  OP here. I built this because I recently caught myself almost pasting a block of logs containing AWS keys into Claude. The Problem: I need the reasoning capabilities of cloud models (GPT/Claude/Gemini), but I can't trust myself not to accidentally leak PII or secrets. The Solution: A Chrome extension that acts as a local middleware. It intercepts the prompt and runs a local BERT model (via a Python FastAPI backend) to scrub names, emails, and keys before the request leaves the browser. A few notes up front (to set expectations clearly): Everything runs 100% locally. Regex detection…

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  Shadow AI Blocker2025 · chromewebstore.google.com · ▲10

  Mitigate the use of unauthorized AI tools

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  Sentinelle PIIFeb 2026 · sentinelle-pii.fr · ▲2

  Stop leaking personal data to ChatGPT, Claude & Gemini

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  AI Safeguard2025 · aisafeguard.co.uk · ▲14

  Prevent sensitive data leaks in popular LLM's like ChatGPT

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  ShadowAI-GuardAug 2026 · shadow-ai-guard-plat-c0ir.bolt.host · ▲1

  Zero-trust AI perimeter that masks PII for privacy

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  NICH: GPT Anonymizer2025 · nichtech.uk · ▲14

  I built NICH after realising I couldn't use ChatGPT for my conflict research work without risking data leaks. It's a browser extension that: - Anonymises names, emails, and addresses in one click - Preserves context for AI to understand - Restores original data in AI responses - 100% browser-based (no cloud, data never leaves your device) Built it for researchers, lawyers, HR professionals or simply anyone handling confidential data who wants AI assistance without compliance nightmares. Free to use: https://www.nichtech.uk Would love feedback from the HN community!

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