By George Curta · Last updated 2026-05-28
anonym.legal vs Kong AI Gateway
Kong AI Gateway is an API gateway that governs and secures LLM traffic, with an optional PII Sanitizer plugin for detecting and redacting sensitive data. anonym.legal is a PII anonymization platform with reversible encryption, 285+ entity types, and user-level tools for transforming data before sharing with AI.
Learn more about Kong AI Gateway
Feature Comparison
| Feature | anonym.legal | Kong AI Gateway |
|---|---|---|
| PII Detection | Yes | Check |
| PII Redaction/Anonymization | Yes | Check |
| Reversible Encryption | AES-256-GCM | Not found |
| Entity Types | 285+ | Not documented |
| Languages Supported | Yes | Not documented |
| REST API | Yes | Check |
| MCP Server | Yes | Not found |
| Chrome Extension | Yes | Not found |
| Office Add-in | Yes | Not found |
| Desktop App | Yes | Not found |
| GenAI Security Gateway | No | Check |
| Self-Hosted Option | No | Check |
| EU Data Residency | Germany (Hetzner) | Not documented |
| Free Tier | Yes | Not documented |
| Starting Price | Free / €3/mo | Contact sales |
| Zero-Knowledge Auth | Yes | — |
Comparison based on publicly available information. "Not found" indicates feature not documented on product page. Last updated February 2026.
Why Choose anonym.legal
Reversible Encryption
AES-256-GCM encryption with your keys. Decrypt when needed for audits, court orders, or compliance reviews.
285+ Entity Types
Detect PII across healthcare, financial, legal, and personal data categories with checksum validation for IDs.
Chrome Extension
Protect data before sending to ChatGPT, Claude, or Gemini. Browser-level anonymization for AI workflows.
MCP Server
Native integration with Claude Desktop via Model Context Protocol. Build privacy-first AI workflows.
48 Languages
Multi-language entity recognition with country-specific ID validation. Global coverage for international documents.
Transparent Pricing
Free tier + €3-29/month plans with no sales calls required. Know your costs upfront.
Zero-Knowledge Security
Your password never leaves your device. Even if our servers were breached, your credentials remain safe.
Choose Kong AI Gateway when you need:
- Full API gateway with LLM traffic management
- Self-hosted Docker deployment
- Integration with existing Kong infrastructure
- Centralized API governance and rate limiting
- Full control over LLM proxy routing
Frequently Asked Questions
How does Kong AI Gateway differ from anonym.legal?
Kong AI Gateway is an API gateway focused on managing and governing LLM traffic at the infrastructure level. anonym.legal is a PII anonymization platform with end-user tools (Chrome Extension, Office Add-in, Desktop App) for transforming sensitive data before sharing with AI services.
Does Kong's PII Sanitizer support reversible anonymization?
Kong's PII Sanitizer plugin performs PII detection and redaction, but reversible tokenization is not documented in their public product pages. anonym.legal offers reversible encryption with AES-256-GCM for scenarios where you need to restore original values.
Can I use both solutions together?
Yes. Kong can handle API gateway routing and rate limiting for LLM traffic. Meanwhile, anonym.legal can provide pre-gateway anonymization or end-user tools for direct AI interaction. They address different layers of AI security.
What about EU data residency?
anonym.legal processes all data in Germany (Hetzner infrastructure) with no US cloud providers. Kong can be self-hosted but data residency depends on your deployment configuration.
Which solution is more cost-effective?
anonym.legal offers transparent pricing starting at €3/month with a free tier. Kong pricing requires contacting sales and typically involves enterprise licensing. For teams not already using Kong infrastructure, anonym.legal provides a more accessible entry point.
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.
Try anonym.legal Free
Start protecting sensitive data today with 285+ entity types, 48 languages, and reversible encryption.
About this page
We update this page when our platform or the law changes.
Read our founder note for how we work.
Each change shows up in the timestamp at the top.
Related reading
- Common questions
- Glossary
- How tokens work
- Security posture
- Where we comply
- What we detect
- Case studies
- Release notes
We follow these rules
- GDPR (EU 2016/679).
- ISO/IEC 27001:2022.
- NIS2 (EU 2022/2555).
- HIPAA safe harbor under 45 CFR § 164.514(b)(2).
Our promise
We do not sell your data.
We do not train models on your text.
We store your files in Germany.
You can delete your account at any time.
You own your work.
Where we run
Our servers live in Falkenstein, Germany.
We use Hetzner. They hold ISO 27001 certification.
All data stays in the EU.
Backups run every day.
Need help?
Email support@anonym.legal.
We reply within one business day.
How we test
We run a full check suite on every release.
Each surface gets its own sweep script and report.
Human reviewers spot-check the output each week.
We track recall and precision on a labelled set.
Bad runs block the deploy.
What we never do
- We never sell your information to third parties.
- We never train models on what you upload.
- We never keep your work after you delete it.
- We never share keys with any outside firm.
- We never run ads inside the product.
Plans in plain words
We sell credits, not seats.
One credit covers one short job.
Long jobs use a few credits each.
You can top up at any time.
Unused credits roll over each month.
Read the plans page for current rates.
Who built this
A small team of engineers and lawyers built this.
We ship from Europe and work in the open.
Our founder note spells out why we started.
Where to start
- Open the web app and try a sample file.
- Learn how credits get counted.
- See current plans and limits.
- Meet the team behind the product.
How the parts fit
A browser add-on cleans text inside Chrome.
A Word plug-in handles drafts in Office.
A small desktop tool works on whole folders.
An agent protocol link feeds large models safely.
All four share one core engine and one rule set.
Words from our team
We started this work after a lunch about cookies.
One friend kept getting odd ads on her phone.
We asked why a court file leaked through a draft.
We sketched the first build on a napkin that week.
By month three we had a tiny demo for a friend.
She used it on her first case the next day.
Common questions we hear
Can the tool read scanned PDFs? Yes, with OCR.
Does it work on long files? Yes, in small chunks.
Can I roll my own rule set? Yes, save it as a preset.
Does it run offline? The desktop build runs offline.
Do you keep my files? No, the cloud build wipes after each run.
Will it learn from my work? No, we never train on inputs.
A short tour of the workflow
Upload a file or paste a snippet of prose.
Pick the entities you want gone from the draft.
Choose a method: replace, mask, hash, encrypt, or redact.
Press run and watch the side panel show each hit.
Skim the result and tweak any rule that misfired.
Save the cleaned file or send it to a teammate.