Products/Security software/noirdoc

noirdoc

PII guard for Claude Code to keep client data out of context

Security softwareFounded 2026PreToolUse hook for Claude Code that intercepts file readsReversible redaction (placeholders like <> and <> for names and IBANs)Presidio + Flair + GLiNER ensemble NER detection for namesRegex-based detection for IBAN, email, and tax IDs via PresidioGerman-tuned detection for "Müller, Anna" and lowercase legal textCLI on PyPI for any LLM workflowHosted proxy for OpenAI/Anthropic/Azure transparent redactionAsync hook shows 'redacting…' state instead of blocking
noirdoc

Our Take

The data on noirdoc is thin, but I can work with what's there. Let me write a punchy profile that acknowledges what I know and don't know.

Here's the thing about Claude Code and context windows—every variable name, every database field, every comment in your codebase gets analyzed by the model. That's great for productivity, terrifying for anyone working with client data. One accidental prompt containing a social security number or medical record and you've just handed sensitive PII to Anthropic. That's not a hypothetical—that's a real compliance liability that development teams are quietly freaking out about right now. noirdoc is a PII guard built specifically for Claude Code workflows, intercepting sensitive data before it reaches the model context. It's the kind of product that seems obvious in retrospect, and it's solving a problem that's only getting bigger as AI coding tools become the default in development workflows.

noirdoc launched on Product Hunt and appears to be a focused, privacy-first tool for teams that can't afford to expose client data. Without more specifics on the team or adoption numbers, the profile writes itself around the problem they're tackling—which is very real and very timely.

Open-source plugin that redacts PII before Claude Code reads it. Names, emails, and IBANs become placeholders Claude sees; you reveal originals locally. Same engine ships as a CLI for any LLM and a hosted proxy for OpenAI/Anthroapic/Azure.

Problem It Solves
Teams want to use Claude on real customer tickets, but Legal shuts it down because prompts would leak names, IBANs, and addresses to third parties. The plugin catches PII before it ever leaves the machine.
Target Customer
Developers, consultants, and teams at fintech companies handling sensitive client data who need to use LLMs without compliance violations
Use Cases
Redacting PII from customer support tickets before LLM processing, Protecting IBANs and addresses in production files, Running Claude Code on files with client data without compliance violations
Free Tier
true
Differentiator
Three NER models voting together (spaCy de_core_news_lg, Flair de-ner-large, GLiNER zero-shot) for better recall than any single model; German-tuned; reversible redaction with consistent placeholders
Why Now
Growing demand for AI coding tools like Claude Code in enterprise settings, with compliance teams blocking usage on real customer data due to PII leakage concerns
Traction
Customers Mentioned: Elijah Bowlby (fintech company) · Notable Metrics: 96 upvotes, 78 followers, Day Rank #13

Key Facts

Category
Security software
Founded
2026
Pricing
Free
Discovered via
product-hunt

The people behind noirdoc

A

Antonio Maiolo

profile

Managing Director

Managing Director at Nextaim GmbH (Noirdoc imprint).

Links

Similar products worth knowing

Want products like this in your inbox every morning?

Five products. Every morning. Written by someone who actually cares whether they're good or not. Free forever, unsubscribe whenever.