Legal notice
Last updated 2026-07-17
In accordance with Article 6-III of French Law No. 2004-575 of 21 June 2004 on confidence in the digital economy (LCEN), this legal notice identifies the publisher and host of the usekayu.com website.
1. Site publisher
The usekayu.com website and the Kayu app are published by:
- Publisher: Lucas Tostee
- Status: sole proprietor (auto-entrepreneur / micro-entreprise regime)
- Address: 66 rue des Remparts, 33000 Bordeaux, France
- SIRET: 830 928 412 00014 (SIREN 830 928 412)
- VAT: VAT not applicable, Article 293 B of the French General Tax Code (VAT-exempt small business — no intra-EU VAT number)
- Contact:
app.kayu@gmail.com
2. Publication director
The publication director is Lucas Tostee.
3. Site host
The usekayu.com website is hosted by:
- Vercel Inc.
- Address: 340 S Lemon Ave #4133, Walnut, CA 91789, USA
- Website:
https://vercel.com
4. App backend hosting
The backend services of the Kayu mobile app (authentication, database, SMS delivery, logs) are hosted by Amazon Web Services EMEA SARL (Luxembourg), in region eu-west-3 (Paris, France). Personal data processed by the app stays within the European Union; details are in the Privacy Policy.
5. Intellectual property
All elements of the site and app (brand, logo, design, text, code) are protected by intellectual property law and remain the property of Lucas Tostee. Medication data comes from public government sources (ANSM in France, Health Canada in Canada) and is used under their respective open-data licences.
6. Personal data and privacy
The processing of personal data, cookies, and your rights (access, rectification, erasure, objection) are described in the Privacy Policy. For any request regarding your data, write to app.kayu@gmail.com.
7. Contact
For any question: app.kayu@gmail.com.
This document was drafted with AI assistance and reflects the LCEN requirements as understood on 17 July 2026. It is not a substitute for review by a licensed lawyer.