AI · alternatives · 2026
24 alternatives to Local Privacy Firewall-blocks PII and secrets before ChatGPT sees them
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…
Local Privacy Firewall is a Chrome extension that prevents accidental leaks of sensitive data when using AI models like ChatGPT, Claude, and Gemini. It intercepts prompts before they're sent and uses local… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Stay compliant and redact sensitive data in ChatGPT
2023 · chromewebstore.google.com · its alternatives →
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HeimWall▲34Signal, not surveillance. See how your engineers use Cursor, Claude Code, and Copilot: catch leaked secrets, PII, and confidential data, without blocking them or reading their prompts.
Jul 2026 · heimwall.ai · its alternatives →
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noirdoc▲96PII guard for Claude Code to keep client data out of context
Apr 2026 · noirdoc.de · its alternatives →
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Anonymize PII before sending to ChatGPT, Claude & Gemini
Mar 2026 · anonym.legal · its alternatives →
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Lakera▲131Secure your conversations with ChatGPT
2023 · chromewebstore.google.com · its alternatives →
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Hi HN, I built PII Firewall because I got tired of watching "privacy" APIs secretly pipe user data to cloud AI models. If you're using GPT/Claude to redact PII, you're literally giving the AI your PII. What makes this different: - Zero AI – deterministic regex + 30 checksum validators (Luhn, Verhoeff, Mod 11/97) - Zero storage – processes on Cloudflare edge, no logs, no persistence - 152 PII types – SSN, Aadhaar, 50+ country IDs, 20 API key formats, crypto wallets - Two modes: `/fast` (2-5ms) for structured PII, `/deep` (5-15ms) adds names/addresses via 2000+ name…
Dec 2025 · pii-firewall-edge-web.vercel.app · its alternatives →
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I've been experimenting with Claude Code, ChatGPT Agent, and OpenClaw to perform more open-ended tasks for me online. A big blocker I've hit on shopping and research tasks is the agent getting a key piece of info wrong. For example, in one case, my agent decided to add a brand I don't like to the cart because the site flagged it as almost sold out The HN crowd is probably pretty aware of the threats and can avoid them while browsing. But what about their agents? I tried prompting, but it was ineffective, because once the AI saw the threat, it polluted/distracted its context Looking at…
Jun 2026 · github.com · its alternatives →
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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…
Dec 2025 · medium.com · its alternatives →
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Task Sentry▲129Free AI website blocker for Chrome that stops distractions in real-time. 100% private on-device processing. Block the right sites at the right time.
Nov 2025 · tasksentry.app · its alternatives →
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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
2025 · blog.alexewerlof.com · its alternatives →
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Catch credentials and PII before pasting into ChatGPT, Claude, Gemini, and more LLM chats. Runs entirely on your device. Free, open source.
Jun 2026 · redact.clearformlabs.com · its alternatives →
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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!
2025 · nichtech.uk · its alternatives →
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As I started to use Claude Code to do more random tasks I realized I could basically build any CLI tool and it would use it. So I built one that controls the browser and open-sourced it. It should work with Codex or any other CLI-based agent! I have a long term idea where the models are all local and then the tool is privacy preserving because it's easy to remove PII from text, but I'd definitely not recommend using this for anything important just yet. You'll need a Gemini key until I (or someone else) figure out how to distill a local version out of that part of the pipeline. Github link:…
2025 · cli-agents.click · its alternatives →
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AI Safeguard▲14Prevent sensitive data leaks in popular LLM's like ChatGPT
2025 · aisafeguard.co.uk · its alternatives →
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Hi HN, I’m the founder of Pangea. We’ve built a developer platform where you can easily add security to your code through a simple set of APIs - features like authentication, secrets management, audit logging, redaction of PII, restricting embargoed countries, known threat actor intelligence, etc. With the ChatGPT and LLM explosion, we thought of ways to reduce the risk of both the inputs and outputs from these services. Our NextJS sample app adds a security layer on top of ChatGPT with various security services that you can implement quickly. It’s basically a front end to the OpenAI API…
2023 · github.com · its alternatives →
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gtm-api.com▲34Give Claude & ChatGPT the keys to your LinkedIn. Free.
Sep 2026 · gtm-api.com · its alternatives →
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GitHub▲2Local sensitive data & API key blocker for ChatGPT.
Jun 2026 · github.com · its alternatives →
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I kept pasting code with hardcoded API keys, database credentials, and auth tokens into ChatGPT while debugging. Copy a failing function, paste it into AI, and realise your AWS secret key or Stripe token was right there in the snippet. So I built (with some help from Claude) a simple Chrome extension that intercepts the paste, detects secrets using local regex, and replaces them with [MASKED] before they reach the chat. Originals stay in a local AES-256 encrypted vault for unmasking. No servers. No network requests. No tracking. ~41 KB, zero dependencies. Don't take my word for it: 'grep -r…
Aug 2026 · secretsanitizer.com · its alternatives →
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Stop leaking personal data to ChatGPT, Claude & Gemini
Feb 2026 · sentinelle-pii.fr · its alternatives →
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What PII-Shield does: It's a K8s sidecar (or CLI tool) that pipes application logs, detects secrets using Shannon entropy (catching unknown keys like "sk-live-..." without predefined patterns), and redacts them deterministically using HMAC. Why deterministic? So that "pass123" always hashes to the same "[HIDDEN:a1b2c]", allowing QA/Devs to correlate errors without seeing the raw data. Key features: 1. JSON Integrity: It parses JSON, sanitizes values, and rebuilds it. It guarantees valid JSON output for your SIEM (ELK/Datadog). 2. Entropy Detection: Uses context-aware entropy…
May 2026 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →