Theon Express
The Private ChatGPT Alternative. 100% EU-Sovereign. Zero Setup.
Give your team the speed of advanced AI without the compliance risks. Theon Express provides an instant, web-based chat interface hosted strictly in Europe. No data logging, no model training—just pure, secure inference.
Simple, Transparent Pricing
€ 15
per user / month
Plan Includes:
- Unlimited prompts
- Isolated project workspaces
- Secure web-based AI Chat
- Upload and analyze local documents
- Standard support
Consumer Simplicity, Enterprise Privacy
Your team wants the agility of public AI chatbots, but your compliance team requires absolute data isolation. Theon Express bridges the gap on day one.
Familiar Interface
Zero learning curve. A clean, intuitive chat interface that operates exactly like the tools your team is already using, but fully locked down.
100% EU-Cloud Infrastructure
Deployed strictly on European cloud nodes. Your prompts and uploads never leave EU jurisdiction, ensuring effortless compliance with NIS2 and GDPR.
Pure Inference Sandbox
We operate on a strict zero-retention model. Your inputs are never used to train LLMs, keeping your uploaded documents and text prompts completely isolated.
Instant Corporate Pilots
Bypass lengthy IT audits and complex system integrations. Create corporate profiles today to give your department a secure playground for AI productivity.
What's best for your team?
Prometheon offers two distinct paths to sovereign AI. Theon Express is designed for speed and simplicity, giving your teams a secure, compliant chatbot environment in seconds. Theon is built for depth, providing a tailored, on-premise AI backbone that integrates directly into your existing IT infrastructure and internal data sources.


What is it?
A secure, web-based AI chatbot (your private ChatGPT alternative).
What is it?
A deeply integrated AI Knowledge Engine & Internal Search.
Deployment
Instant Web SaaS (Hosted in 100% EU-Sovereign Cloud).
Deployment
On-Premise or in your private Sovereign Cloud (Behind your firewall).
Setup Time
Instant. Ready to use in seconds.
Setup Time
Structured. Tailored deployment to your architecture.
Data Ingestion
Sandbox environment. Analyzes only the files you manually upload.
Data Ingestion
Full enterprise ingestion (SharePoint, internal databases, network folders).
Access Control
Basic user/profile management.
Access Control
Advanced Role-Based Access Control (RBAC) inherited from source systems.
Pricing Model
Simple, predictable per-user monthly fee (€15/user).
Pricing Model
Flat-rate enterprise pricing (hardware or hosting + software license + SLA).