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uAI
AI assistant
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Présentation
Tout votre espace de travail.
Dans un onglet de navigateur.
uOS est un vrai bureau qui s'ouvre dans un onglet. Chat, mail, files, documents, spreadsheets, boards, calendar and AI — fifteen applications sharing one file system and one identity, on any device, with nothing to install. Your messages, files and documents are end-to-end encrypted in your browser. Built and run in the European Union, and free forever for individuals and families.
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Ce que vous en faites
Une journée de travail, le tout dans une fenêtre.
Sign in and your desktop is there — the same one, on your laptop, your phone, a borrowed machine. Nothing to install, nothing left behind when you close the tab.
Talk to your people
Message one-to-one or in groups, send voice notes and files, and jump into a video call — with automatic translation across 26 languages when you need it.
Chat and calls →Handle your mail
A real inbox with folders, attachments, replies and search — plus contacts and a calendar that share the same address book, so scheduling never leaves the workspace.
Mail and calendar →Keep your files
Folders, drag-and-drop upload, previews and sharing with read, write or admin rights per file — synced across every device you sign in on.
Files and storage →Write and calculate
Documents and spreadsheets with real-time co-editing — you see who else is in the file, formulas work, and .xlsx files import and export cleanly.
Documents and sheets →Run your projects
Kanban boards with cards, checklists, assignees and due dates, quick notes for anything you need to capture, and a task list that keeps the rest straight.
Boards, notes and tasks →Put AI to work
An assistant that reads your documents and helps you write, and a builder that turns a plain-language description into a working internal tool — no server to set up.
AI and Studio →
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Voir ça courir
Pas un paquet d'onglets. Une seule machine.
Every application below is a real window in the same desktop, sharing one file system, one contact list and one identity. Pick any of them to watch it run.
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uChat
Messaging and conversations
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uMeet
Direct peer-to-peer video & audio calls
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uMail
Encrypted email
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Contacts
People and groups
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uLine
Social feeds inside the OS
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Calendar
Events
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uTodo
Encrypted to-do list
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uBoards
Kanban boards
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uFiles
File management
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uNotes
Encrypted personal notes
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uDoc
Document editor
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uSheet
Spreadsheet editor
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uStudio
AI-powered app builder
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Account
Identity, recovery and audit
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Souveraineté
Trois propriétés que vous ne trouverez nulle part ailleurs.
Chacun est une propriété de la façon dont le système est construit, et non une revendication de marketing.
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Construit et exploité en Europe
Infrastructure hosted in the European Union. GDPR-compliant by architecture. Source code, deployment, support — all European.
Pourquoi ça compte ?
L'infrastructure européenne signifie que la loi américaine CLOUD ne s'applique pas. Aucun accès extraterritorial à vos données, jamais.
Pas de loi américaine sur le CLOUD · Pas de compétence extraterritoriale
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Zéro cookies, zéro suivi
No cookies. No trackers. No data resale. The server only stores public keys and encrypted blobs — it cannot read your content.
Pourquoi ça compte ?
Sans scripts tiers, il n'y a pas de vecteur d'attaque de chaîne d'approvisionnement. Aucun tiers ne peut profiler votre lecture.
Serveur stocke le chiffrement seulement
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Votre AI, votre modèle
L'IA intégrée utilise le fournisseur que vous choisissez : modèle interne, déploiement cloud privé ou API commerciale sur votre propre clé.
Pourquoi ça compte ?
Vos instructions et conversations ne sont pas utilisées pour former des modèles commerciaux. L'inférence AI reste privée à votre compte.
Aucun fournisseur imposé, jamais
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Génie
Comment nous protégeons vos données.
If you are not an engineer, here is the idea: there are computers — quantum computers — that one day will be able to decrypt what is encrypted today. UltimaOS already uses the new generation of cryptography, NIST-standardized, designed to resist these quantum computers. This is the architectural choice, not a feature you can toggle off.
For engineers — the cryptographic stack ANNEXE
| Calque | Algorithme | Norme |
|---|---|---|
| Signatures | ML-DSA-65 | FIPS 204 |
| Encapsulation des clés | ML-KEM-768 | FIPS 203 |
| Chiffrement symétrique | XChaCha20-Poly1305 | RFC 8439 |
| Dérivés clés | HKDF-SHA256 | RFC 5869 |
Zero RSA · Courbe elliptique zéro · 100% post-quantum
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Accès rapide
Rejoignez la première génération d'utilisateurs européens.
UltimaOS is in active development. Access is free during the early access phase, invite-only. Organizations: direct access to the team building the system. Individuals: ask for an invite.
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Foire aux questions
Questions sur l'espace de travail chiffré post-quantum.
Qu'est-ce qu'un espace de travail chiffré post-quantum?
Réponse courte
A workspace whose cryptography resists attacks by future quantum computers. UltimaOS uses the NIST-standardized post-quantum algorithms ML-DSA-65 (FIPS 204) for digital signatures and ML-KEM-768 (FIPS 203) for key exchange, layered with classical XChaCha20-Poly1305 symmetric encryption. Private keys never leave your device.
UltimaOS GDPR est-il conforme?
Réponse courte
Yes. Infrastructure is hosted in the European Union, our company is established in the EU, and the architecture is GDPR-compliant by design — we cannot read your data, we do not run advertising, and we set zero cookies. See the page de sécurité pour plus de détails.
Quelles applications UltimaOS inclut ?
Réponse courte
Fifteen applications today: Account, Contacts, uMeet, uFiles, uChat, uTodo, uStudio, uAI, uDoc, uSheet, Calendar, uBoards, uMail, uNotes, uLine — with uMarket and others on the roadmap. Chat, mail, files, notes, tasks, documents, spreadsheets and private boards are end-to-end encrypted in your browser; calendar events, AI conversation history and Studio app source are readable server-side today, and each application page says which applies.
UltimaOS peut-il être utilisé pour les affaires?
Oui. uOS for Business offers European organizations a zero-knowledge workspace for their teams. Invite-bound membership, signed audit logs, bring-your-own-AI, managed single-tenant deployment, and EU-only data residency.
Qu'est-ce qui rend UltimaOS différent de Signal ou Proton ?
UltimaOS is a full operating system — chat, mail, files, documents, boards, calendar, contacts — running in your browser with a single private key working across every app. It is post-quantum end-to-end, across every operation, with no fallback to classical primitives. And it is built and operated in the European Union under EU privacy law.
Comment la chiffrographie post-quantique me protège aujourd'hui ?
A "store now, decrypt later" attack records encrypted traffic today and decrypts it once a sufficiently powerful quantum computer is available. Post-quantum algorithms defeat that attack vector. UltimaOS keys are rotated frequently, so even a quantum breach would yield only a narrow slice of historical data.
Où puis-je en savoir plus sur les choix chiffrographiques?
Our engineering pages document the exact cryptographic stack, with references to NIST FIPS 203, FIPS 204, and the relevant IETF RFCs. Those algorithms are public standards you can verify independently. The client ships to your browser as a standard single-page app, so the code that runs can be inspected directly in developer tools — inspectable today, with signed reproducible builds on the roadmap to make it mechanically verifiable. The backend is proprietary; you can query its behaviour from inside uOS, where uAI answers questions about how it works.
Comment puis-je essayer UltimaOS ?
L'accès est gratuit pendant la phase d'accès précoce, uniquement sur invitation. Demander une invitation and the team will respond within a few days. Organizations can demander un accès direct pour un pilote prolongé.
Vous cherchez autre chose ? Voir le texte intégral FAQ or sur l'équipe.