By George Curta · Last updated 2026-05-19
anonym.legal vs Nightfall
Nightfall recently launched a browser security solution that intercepts data in Chrome, Edge, Firefox, and Safari before it reaches AI tools — blocking submissions that contain sensitive data. anonym.legal takes the opposite approach: instead of blocking AI use, it anonymizes PII before sending, so employees keep working productively while data stays compliant. 285+ entity types, 48 languages, reversible AES-256-GCM encryption, EU servers (Germany), free tier.
Learn more about Nightfall
Feature Comparison
| Feature | anonym.legal | Nightfall |
|---|---|---|
| Primary Focus | PII Anonymization | DLP / Data Loss Prevention |
| Data Handling Approach | Yes | Block (prevent transmission) |
| Pricing | Free to €29/mo | Enterprise (contact sales) |
| Free Tier | Yes | Not found |
| PII Detection | Yes | Check |
| Entity Types | 285+ | AI-based (count not published) |
| Language Support | 48 languages | Not published |
| Reversible Encryption | AES-256-GCM | Not found |
| Browser Coverage | Yes | Chrome, Edge, Firefox, Safari + AI browsers |
| Browser Action | Yes | Block submission |
| MCP Server (AI Tools) | Yes | — |
| Office Add-in | Yes | — |
| Desktop App | Yes | — |
| DLP Policy Enforcement | No | — |
| SaaS App Monitoring | Yes | Slack, GitHub, Google Drive, Salesforce, Zendesk, M365 |
| GenAI Security | Yes | Check |
| EU Data Residency | Germany (Hetzner) | US servers |
| Zero-Knowledge Auth | Yes | — |
| Prompt Sanitization | Yes | Partial (blocking + monitoring) |
| Admin / MDM Required | No (browser-based + optional desktop app) | Yes (enterprise IT deployment) |
| AI Platforms Covered | Yes | ChatGPT, Claude, Gemini, Copilot |
| Deployment Time | Yes | Days to weeks (IT rollout) |
Comparison based on publicly available information. "Not found" indicates feature not documented on product page. Last updated February 2026.
Why Choose anonym.legal
Anonymize, Don't Block
Nightfall stops data from reaching AI tools. anonym.legal transforms it — employees use ChatGPT, Claude, and Gemini safely without blocked workflows or IT helpdesk tickets.
Anonymization-First
Purpose-built for PII anonymization with 285+ entity types. Nightfall focuses on DLP policy enforcement and blocking.
Reversible Encryption
Decrypt anonymized data when legally required for audits or court orders. Nightfall offers blocking and redaction only — no reversible output.
Transparent Pricing
Free tier + €3–€29/month plans. Nightfall uses enterprise pricing — contact sales for quotes.
MCP Server
Native AI tool integration via Model Context Protocol for Claude Desktop, VS Code, and AI pipelines. Nightfall does not offer an MCP server.
Office Add-in + Desktop
Anonymize directly in Microsoft Word, Excel, PowerPoint, or batch-process files locally. Multiple delivery methods beyond the browser.
48 Languages
Explicit multi-language support with country-specific entity recognition (German Steuer-ID, French NIR, Dutch BSN, Japanese My Number, etc.). Nightfall's language coverage is not published.
EU Data Residency
All processing on Hetzner servers in Germany. No US Cloud Act exposure. Nightfall runs on US servers.
Zero-Knowledge Security
Your password never leaves your device. Argon2id + HKDF key derivation — only a mathematical proof is sent to the server. Nightfall does not offer zero-knowledge authentication.
When Nightfall Might Be Better
Nightfall excels in specific enterprise scenarios:
- Organization-wide browser blocking: Need to prevent all AI tool submissions across Chrome, Edge, Firefox, and Safari via centralized IT policy
- SaaS monitoring: Monitor Slack, GitHub, Confluence, Google Drive, Salesforce, and Zendesk for sensitive data leaks with automated remediation
- Email DLP: Scan and block sensitive data in outgoing emails
- Endpoint DLP: Monitor file uploads, clipboard activity, Git/CLI operations, USB transfers, and cloud sync across managed devices
- Unified DLP platform: Need a single platform covering browser + SaaS + endpoint with policy management and compliance reporting
Frequently Asked Questions
Nightfall just launched a browser security product. How does it compare to anonym.legal's Chrome Extension?
Nightfall's new browser solution blocks data from being submitted to AI tools when sensitive content is detected. anonym.legal's Chrome Extension anonymizes the data and lets it through — PII is replaced with tokens before the prompt is sent to ChatGPT, Claude, or Gemini. The workflow difference is significant: Nightfall breaks the submission; anonym.legal preserves it with the sensitive data removed. Nightfall also targets enterprise IT deployment across Chrome, Edge, Firefox, and Safari. anonym.legal's extension installs directly from the Chrome Web Store with no admin or MDM required.
What's the main difference between anonym.legal and Nightfall?
anonym.legal is anonymization-first — designed to detect, transform, and optionally decrypt PII so data can be used safely in AI tools and document workflows. Nightfall is DLP-first — focused on preventing data loss through detection and blocking across SaaS applications, browser inputs, and endpoints. The core philosophy differs: Nightfall says no to the data leaving; anonym.legal says yes, but only the anonymized version.
Can I use anonym.legal alongside Nightfall?
Yes. The tools are complementary rather than competing. Nightfall provides organization-wide policy enforcement, SaaS monitoring, and endpoint DLP. anonym.legal provides individual-level anonymization with reversible encryption for workflows where data must remain usable — contract review, clinical documentation, support operations, and developer AI use. Many enterprises deploy both: Nightfall for policy control, anonym.legal for workflow-level anonymization.
What pricing models do they use?
anonym.legal offers transparent pricing: a permanent free tier with 200 tokens/month, plus paid plans from €3/month. Nightfall uses enterprise pricing — contact their sales team for quotes. There is no publicly listed price for Nightfall's new browser security product.
Does anonym.legal offer reversible encryption?
Yes. anonym.legal provides AES-256-GCM reversible encryption — you can decrypt anonymized data when legally required for audits or court orders. Nightfall offers detection, blocking, and redaction — no reversible anonymization output.
How do entity counts compare?
anonym.legal detects 285+ entity types with country-specific identifiers across 25+ countries (German Personalausweis, French INSEE, Dutch BSN, UK NIN, etc.). Nightfall uses AI-based and ML detection but does not publish a specific entity type count.
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. Nightfall does not offer zero-knowledge authentication.
Try anonym.legal Free
Anonymize instead of block. Reversible encryption. Start with 200 free tokens today.
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.