Chat Workspace
Get your tasks done in a workspace designed for sensitive data.
Confidential AI
for Professionals
Your data stays yours, nobody but you can read it. Not even us.
Made in the EU
Zero-access by Design
GDPR-native
Inference API
Power your AI apps with verified confidentiality.
See Tresor in
action.Proof,
not promises.
Most AI providers ask you to trust their policies. Tresor is built so you do not have to.
Sealed hardware
Your data is processed where nobody can look, not even us.
Every request runs inside a hardware enclave: a sealed region of the processor where memory is encrypted by the chip itself. Cloud operators, system administrators, and Tresor staff all see the same thing, ciphertext. There is no admin override and no “just this once.”
Learn how it worksVerified runs
Every response comes with cryptographic proof of where it ran.
Each answer carries a signed receipt that proves it was processed inside the expected enclave, running the exact code we claim. Auditors, compliance teams, and curious engineers all get the same evidence.
See a sample receiptPowered by frontier models.
The best of open source, isolated and verifiable in Zero-Access TEEs.
For work you can't paste into ChatGPT.
Tresor is built for the documents, conversations, and decisions that have to stay private.
Healthcare
The patient notes and intake records that can't go near a public chatbot.
What Tresor unlocks
Clinical decision support, medical record summarisation, therapy notes, intake processing — all inside hardware nobody can inspect, including us.
Why it holds up
GDPR Art. 32 requires "appropriate technical and organisational measures" for patient data. Hardware-encrypted processing is among the strongest technical measures available — verifiable per-request.
Privacy without the trade-off.
Public AI tools read everything you send. On-prem is private but impractical. Tresor gives you both: cloud convenience, infrastructure-grade privacy.
Powerful Models
Public Cloud AI
On-Prem
Tresor AI
EU-hosted
Public Cloud AI
On-Prem
Tresor AI
Zero-Access
Public Cloud AI
On-Prem
Tresor AI
No Ops
Public Cloud AI
On-Prem
Tresor AI
No Setup
Public Cloud AI
On-Prem
Tresor AI
Verifiable Proof
Public Cloud AI
On-Prem
Tresor AI
Trusted by people who don't trust easily.
I can only use AI in coaching when it fully protects the sacred trust between practitioner and client; confidentiality is non-negotiable.
Tove Thyes
Transformational Coach and Energy Medicine Practitioner
As a software strategist, I treat privacy as the blueprint that lets my team turn client visions into AI people can trust.
Igor Miazek
CEO & Founder, Techs
At Dance, we build experiences people trust. Tresor’s approach to privacy-first AI is a simply a great match.
Christian Springub
CEO & Co-Founder, Dance
As a therapist, I can only use AI that protects client privacy. Tresor delivers exactly that.
Magali Cahen
Psychologist and Therapist, Independent
The only way to earn trust in AI is to make privacy a design principle, not a feature. Tresor’s system does exactly that.
Ingmar Schuster
CEO & Co-Founder, Provolut
In the AI era, rigorous risk-based security and GDPR-aligned privacy are non-negotiable foundations for any trustworthy system.
Davy Cox
Founder, Brainframe
Understand the technical details.
Zero-Access AI Conversations:
How Tresor Protects Your Privacy
Executive Summary
Tresor is built on a simple promise: your conversations belong to you, not us. Every message you type is protected by end-to-end encryption and processed only inside secure computing environments that even Tresor cannot inspect. Teams can now collaborate inside shared workspaces without ever handing Tresor access to their plaintext. This whitepaper explains the principles and safeguards behind Tresor’s zero-access design, showing how we deliver practical confidentiality without trade-offs in usability.