anonym.legal vs ARX Data Anonymization
ARX is an open-source desktop tool for statistical anonymization of tabular datasets using k-anonymity. anonym.legal provides real-time PII detection in unstructured text. Different tools for different use cases.
Feature Comparison
| Feature | anonym.legal | ARX Data Anonymization |
|---|---|---|
| Pricing | Free to €29/mo | Free (Open Source) |
| License | Yes | Apache License 2.0 |
| Primary Use Case | Yes | Tabular dataset anonymization |
| Real-time Text Detection | Yes | No |
| k-Anonymity | No | Yes |
| l-Diversity / t-Closeness | Yes | Yes |
| Differential Privacy | No | Yes |
| NER-based Detection | Yes | No |
| Entity Types | 285+ | Attribute-based (user-defined) |
| Language Support | 48 languages | Language-agnostic (data-based) |
| Deployment | Yes | Desktop (self-hosted) |
| Web Application | Yes | No |
| Desktop App | Yes | Yes |
| Chrome Extension | Yes | No |
| Office Add-in | Yes | No |
| API Access | Yes | Java API |
| Risk Analysis Tools | Yes | Yes |
| HIPAA Safe Harbor | Yes | Yes |
| Reversible Encryption | AES-256-GCM | No |
| Zero-Knowledge Auth | Yes | N/A (offline) |
Comparison based on publicly available information. "Not found" indicates feature not documented on product page. Last updated February 2026.
Why Choose anonym.legal
Real-Time Text Detection
Detect PII in unstructured text as you type. ARX works on pre-structured tabular data only.
AI Chatbot Protection
Chrome Extension intercepts data before it reaches ChatGPT, Claude, or Gemini. ARX doesn't support this use case.
Reversible Encryption
AES-256-GCM encryption lets you decrypt data later. ARX uses irreversible generalization and suppression.
285+ Entity Types
Pre-built recognizers for names, SSNs, credit cards, medical IDs, and country-specific identifiers across 48 languages.
No Setup Required
Managed cloud service. No Java installation, no configuration. Sign up and start immediately.
Zero-Knowledge Security
Your password never leaves your device. Even if our servers were breached, your credentials remain safe.
Frequently Asked Questions
What is the main difference between ARX and anonym.legal?
ARX is designed for statistical anonymization of tabular datasets using k-anonymity and differential privacy. anonym.legal detects and anonymizes PII in unstructured text in real-time. ARX is for data scientists preparing datasets for publication; anonym.legal is for protecting sensitive information in documents, emails, and AI conversations.
Is ARX free?
Yes. ARX is open-source software released under the Apache License 2.0. You can download and use it at no cost. anonym.legal offers a free tier with 200 tokens, then paid plans starting at €3/month.
Can ARX detect names and SSNs in text?
ARX is not designed for real-time text PII detection. It works on pre-structured tabular data where you define which columns contain quasi-identifiers. For detecting PII in unstructured text, you need a tool like anonym.legal that uses NER and pattern matching.
Does anonym.legal support k-anonymity?
No. anonym.legal uses different anonymization methods: replacement with fake values, masking, redaction, hashing, and reversible encryption. K-anonymity is a statistical privacy model for tabular data, not a text anonymization method.
Which tool should I use for HIPAA compliance?
Both tools support HIPAA. ARX has built-in Safe Harbor detection for the 18 HIPAA identifiers in structured data. anonym.legal detects all 18 HIPAA identifiers in unstructured text and provides reversible encryption for authorized access. Use ARX for dataset publishing, anonym.legal for document and communication protection.
Does anonym.legal offer zero-knowledge authentication?
Yes. anonym.legal uses zero-knowledge authentication with Argon2id and HKDF. Your password is processed on your device — only a mathematical proof is sent to the server, never the actual password. ARX is offline desktop software and doesn't require authentication.
Need Text PII Detection?
If you need real-time PII detection in unstructured text, try anonym.legal free. For tabular dataset anonymization, ARX is an excellent open-source choice.