Who builds Kastel

We builtwhat they didn’t want built.

A company should own its context layer, host it wherever it wants and take it along the day it leaves. No vendor whose business is lock-in had any reason to build that.

Our story.

See how it works

The model in place

Enterprise AI arrives as a rental. You plug your knowledge into a vendor, they host it, learn it, and bill you to access it. The day you want to leave, your context stays with them.

What we built

Kastel isn’t an AI. It’s the layer you own. Your processes, decisions, organisation, structured into files that belong to you, exposed to the AI of your choice. Claude, GPT, Mistral, a local model. You switch models in one click. You leave with everything, whenever you want.

Our position.

You own it.

You decide what each AI is allowed to see. Your context, agents, and decisions stay on your infrastructure. Switch provider in one click.

Deployable at your place, tonight.

Your Kastel runs on your own infrastructure. The interface is open: any AI plugs into it over MCP. Not a promise. A reality you can verify on your own infrastructure.

Audit. Export. Leave.

Full export in one command. Zero phone-home. Portability isn’t an option. It’s in the architecture.

Portrait de Alexis PRAT, fondateur de Kastel

A word from the founder

A company’s knowledge is the company itself. Not its servers, not its tools. It. The day that knowledge moves to a vendor’s platform, the company loses something it doesn’t get back. We built Kastel so that never happens.

Alexis PRATFounder · Kastel.AI

We chose our side. Our adversary: lock-in.

They want your company.

Control, lock-in, dependence.

What they host is no longer yours.

Your context, your decisions, your data. On their servers, you’ve lost the keys.

Take back control.

You own your context, switch models in one click, and leave with everything whenever you want.

Read the manifesto →

Let’s build your fortress.

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