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Tech riderRev. 7 Oct 2026

PII Firewall

Ch 155.9of 21 AI Guardrail Software
  1. 1Runs onLinux, self-hosted
  2. 2CostsFree plan
  3. 3Deploymentself hosted
  4. 4Prompt injection defenseNo
  5. 5PII detectionYes
  6. 6Jailbreak detectionNo
  7. 7Custom policiesYes
  8. 8SDK languagesPython
8 lines stated Written from the maker's own pages: pii-firewall.com
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The PII Firewall homepage

Overview

PII Firewall is ranked #15 of 21 in AI guardrail software on Specifiction. It runs on Linux, Self-hosted. There is a free plan.

PII Firewall plans and pricing

All plans
Open source Free Apache 2.0 · Python package · regex-only install needs no ML dependencies pii-firewall.com · 7 Oct 2026

Compared on AI guardrail software

Deployment
self_hostedpii-firewall.com
Prompt injection defense
Nopii-firewall.com
PII detection
Yespii-firewall.com
Jailbreak detection
Nopii-firewall.com
Custom policies
Yespii-firewall.com
SDK languages
Pythonpii-firewall.com

Facts

Purpose
Intercepts and anonymizes PII before it reaches an LLM, then restores original values in the response.pii-firewall.com · 7 Oct 2026
Domain profiles
Built-in profiles include healthcare, finance, legal, generic, and custom.pii-firewall.com · 7 Oct 2026
Detection
Detection backends include regex, Presidio, GLiNER, Transformers, OpenAI Privacy Filter, hybrid, and custom options.pii-firewall.com · 7 Oct 2026
PII handling
Six disposition actions are supported: keep, pseudonymize, redact, generalize, mask, and hash.pii-firewall.com · 7 Oct 2026
Languages
The product says it supports 55+ languages with automatic language detection and locale-specific patterns.pii-firewall.com · 7 Oct 2026
Integrations
Examples cover OpenAI, Anthropic, LangChain, FastAPI, streaming transport, Ollama, LiteLLM, and arbitrary HTTP LLM endpoints.pii-firewall.com · 7 Oct 2026
Data controls
The maker describes tenant-scoped token mappings and a forget operation that deletes vault mappings for a thread or case.pii-firewall.com · 7 Oct 2026
Audit
Each call produces a trace with detected entity types, confidence scores, and applied replacements.pii-firewall.com · 7 Oct 2026
License
The project is open source under the Apache 2.0 license.pii-firewall.com · 7 Oct 2026
Install
The maker provides a Python package install; the base regex-only install has no ML dependencies.pii-firewall.com · 7 Oct 2026
Intended users
The maker highlights healthcare, finance, and legal use cases, including clinical NLP, fintech support automation, and legal document review.github.com · 7 Oct 2026
Notable limit
The maker says the HASH action is for analytics workflows and is not used in built-in presets.pii-firewall.com · 7 Oct 2026

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Where it ranks on Specifiction

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