SOWA Privacy

What it does

Every prompt you send to a AI Chatbot may contain personal data - names, case numbers, client details - sent straight to servers outside your control. SOWA Privacy intercepts it before it ever leaves your browser. Three-layer PII detection running entirely on-premise: Zero cloud. Zero infrastructure changes. Zero disruption to your workflow. Open source, fully auditable, and GDPR-conscious out of the box. Download the free Chrome Extension and make sure none of your data is yours to lose.

SOWA Privacy erkennt und anonymisiert Ihre sensiblen und personenbezogenen Daten, bevor diese ChatGPT, Claude, Gemini und andere KI-Tools erreichen. Die Erkennung erfolgt lokal auf Ihrem Gerät; entwickelt für Teams in regulierten Branchen.

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  Private AI Assistant2024 · alohabrowser.com · ▲151

  True anonymity preventing queries from being 'fingerprinted'

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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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  QuietlyMay 2026 · quietlycode.org · ▲59

  Offline AI IDE & local Chat

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  A local-first, reversible PII scrubber for AI workflowsDec 2025 · medium.com · ▲38

  Hi HN, I’m one of the maintainers of Bridge Anonymization. We built this because the existing solutions for translating sensitive user content are insufficient for many of our privacy-concious clients (Governments, Banks, Healthcare, etc.). We couldn't send PII to third-party APIs, but standard redaction destroyed the translation quality. If you scrub "John" to "[PERSON]", the translation engine loses gender context (often defaulting to masculine), which breaks grammatical agreement in languages like French or German. So we built a reversible, local-first pipeline for Node.js/Bun. Here…

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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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  Local Browser AI2025 · blog.alexewerlof.com · ▲15

  Using the new Prompt API to build a free open source privacy-first chat extension that runs on Chrome or Edge on Linux, Mac, Windows and ChromeOS

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