Your employees use ChatGPT.
So does your data.
Control generative AI usage and reduce your GDPR exposure.
Automatic protection of sensitive data in ChatGPT, Claude and Gemini.
Free forever — installs in 30 seconds
The problem
Shadow AI is expensive. Very expensive.
of employees use AI without IT authorization
Salesforce, 2024
of annual revenue: maximum fine (Article 83 GDPR)
EU Regulation 2016/679
average cost of a data breach in France
IBM Cost of a Data Breach, 2024
Every day, your teams copy-paste client emails, phone numbers, and IBANs into ChatGPT or Claude. Without realizing it, they expose your company to data leaks and financial penalties.
The risk is real: mandatory notification to regulators within 72 hours, compliance audit, fines up to €20M or 4% of global revenue.
Free — installs in 30 seconds, no credit card
Why Sentinelle PII
100% local, zero cloud
No sensitive data ever leaves your browser. Ever.
Exportable DPO report
A PDF ready for your audits: detections by type, by user, by site.
Proof of compliance measures
GDPR Article 32: demonstrate that you actively protect AI data.
The solution
How does it work?
Detection
The extension scans text in real time. Emails, phone numbers, IBANs, credit cards, social security numbers, names of people and organizations are identified instantly — thanks to a built-in AI engine running 100% in your browser.
Pseudonymization
Before sending, sensitive data is replaced with anonymous tokens. The AI never sees the real values.
Re-injection
When the AI responds, tokens are replaced with the real data. You see a complete response, without friction.
File attachments included— CSV, Excel and Word files are also analyzed before upload. You are alerted and can choose to block or allow the upload.
Demo
See it in action
An email and a phone number detected, pseudonymized, then re-injected — fully transparent.
Loading demo...
Flash Audit — 3 minutes
How much sensitive data are you exposing?
Don't take our word for it. Test it yourself in 3 minutes and discover the scale of the problem.
Install the free version
30 seconds, no setup. The extension activates automatically.
Use ChatGPT as usual
Write an email, ask for a client analysis, ask an HR question. Do what you do every day.
Count the alerts
Sentinelle displays every sensitive data item detected. Emails, phone numbers, IBANs — you'll be surprised.
In our internal tests, an employee triggers more than 15 detections per day on average. Multiply by the number of team members using AI — that's the volume of data you're exposing every day.
Start my free auditWho is it for?
Built for demanding professionals
Sentinelle PII is for anyone who handles sensitive data with AI tools.
DPO
Document your clients' compliance with the monthly DPO report. Proof of compliance measures for regulatory audits.
Accounting firm
Protect your clients' financial and banking data when your staff uses AI tools.
CIO / CISO
Control ChatGPT usage without blocking it. Visibility on exposed data, no server configuration needed.
Lawyer
Automatically anonymize your clients' personal data (emails, IBANs, phone numbers) before sending to AI. A technical protection layer for your confidentiality obligation.
Dashboard
A complete compliance dashboard
Everything a DPO needs to document and manage AI data protection.
Plan
TEAMDetections
247
Users
4
Breakdown by PII type
Top sites
185
chatgpt.com
42
gemini.google.com
20
claude.ai
Dashboard
Overview: quota, statistics, 30-day detection history.
Monthly DPO report
PDF export ready for audits. Detections by type, by user, by site.
Team management
Add members, track usage per team member. Up to 5 seats included.
Detections by site
Identify which AI tools are most used: ChatGPT, Gemini, Claude...
Security & benefits
Privacy by Design
Built for professionals who care about their data
local — no PII sent
data types detected
AI platforms supported
Automatic protection
Your employees don't change anything about their habits. Protection is invisible and instant — text and file attachments are analyzed, with alerts before upload.
Zero sensitive data sent
Detection and pseudonymization are 100% local. No personal data leaves your browser.
GDPR compliance evidence
The detection counter proves you've taken action. Your DPO will thank you.
Deploy in 3 minutes
No IT needed. Install the extension, you're done. Works immediately.
Embedded AI, zero cloud
An AI model runs directly in your browser to detect names, organizations and places. No server calls, no data transmitted.
100% local detection — Sensitive data never leaves your browser
chrome.storage.session — Tokens disappear when you close the browser
No data transmitted — Only a JWT authentication token and anonymous counter pass through
Compliant with GDPR Articles 25 & 32 — Data protection by design
Pricing
Choose your plan
Start free, scale as you grow.
Early-adopter pricing — This price is for early subscribers
Solo
To discover Sentinelle PII
- 10 detections per day
- ChatGPT, Claude, Gemini
- File attachment analysis
- Session history
- 1 seat
- Community support
- AI detection — names, organizations, places
Pro
For demanding professionals
- Unlimited detections
- AI detection — names, organizations, places
- Custom websites
- PII file analysis & blocking
- Decoded responses
- Dashboard & 30-day history
- PDF / CSV export
- Email support within 48h
Account activated instantly, log in from the extension
Team
For teams that protect their data
- Unlimited detections
- AI detection — names, organizations, places
- Custom websites
- PII file analysis & blocking
- Team dashboard & DPO report
- 30-day synced history
- 5 seats included
- Priority support within 24h
Additional seats
5 seats included, additional seats at €5/month each
Manage your team from the dashboard
See detailed plan comparison →
No commitment. Cancel in one click from the extension.
DPO, GDPR consultant? Discover our partner program — 30% recurring commission
FAQ
Frequently Asked Questions
Join the first companies protecting their data
Stop exposing your data to AI
Installs in 30 seconds. No credit card required. No commitment.