DocsSign inInstall Kastel
They want to lock you in.

Kastel isn’t an AI.It’s the fortress that belongs to you.

It holds your company’s knowledge, you plug in the AIs of your choice, and they become experts in your business.

Install Kastel

This is your Kastel.

Your Kastel
Your Kastel
Department
Sales86%
Context coverage
What your Kastel holds
#Pipeline & offers#Sales process#Customer history#Talk tracks
Who decides
Head of Sales

Approves discounts above 15% and opening key accounts.

AI agents
Quotes agentClaude Coworkreal time
Leads agentMistrallaunched 2d ago

AIs that stop being generic.

Plugged into your Kastel fortress, the AIs you choose work on your reality. They know your processes, your organisation, your domain knowledge.

They answer right.

On your processes, your customers, your decisions. Not on web generalities.

They remember everything.

Your company memory grows with every exchange. Nothing is lost: everything is stored in your Kastel, and it belongs to you.

Learn more about the product

And your AIs self-improve.

Every exchange moves your Kastel forward. An improvement only applies once the department owner has approved it.

Your Kastel
You work

You grant a 20% discount to a loyal customer.

Kastel notices

No written rule covers this case. It proposes one.

You approve

The Head of Sales confirms, edits or rejects.

Kastel applies

The next AI will know when a discount is justified.

You work

You grant a 20% discount to a loyal customer.

Kastel notices

No written rule covers this case. It proposes one.

You approve

The Head of Sales confirms, edits or rejects.

Kastel applies

The next AI will know when a discount is justified.

and the loop starts again

Building your Kastel? Just a conversation.

The AI asks you a few questions, you answer, and your Kastel is built.

Preview
What are your departments?
Management, Sales, Operations, Logistics, Finance, HR.
Building40 people · 6 departments
ManagementSalesOperationsLogistics…FinanceHR
DriveWebsiteOrg chartProcedures

Two ways to bring AI into your company. Only one belongs to you.

The AI you rentWith Kastel
Your dataLives on their serversStored behind your walls: you decide what each AI is allowed to see
The modelThe vendor’s, imposedAny model, switched in 1 click
OwnershipYour data, captive at the vendorYour data, your context, your infrastructure: yours, exportable
Audit & exportOpaque, no exportFully auditable and exportable
The costThe price rises with the dependencyFree to self-host
Your data
The AI you rent
Lives on their servers
With Kastel
Stored behind your walls: you decide what each AI is allowed to see
The model
The AI you rent
The vendor’s, imposed
With Kastel
Any model, switched in 1 click
Ownership
The AI you rent
Your data, captive at the vendor
With Kastel
Your data, your context, your infrastructure: yours, exportable
Audit & export
The AI you rent
Opaque, no export
With Kastel
Fully auditable and exportable
The cost
The AI you rent
The price rises with the dependency
With Kastel
Free to self-host

You leave whenever you want. With everything.

The AI is a mercenary you replace in one click. The knowledge, the data and the context stay in your Kastel. And your fortress settles wherever you want.

Your Kastel
#context#agents#governance#data
Stays yours
AI switched in 1 click
The AI plugged in
Claude · Anthropic
Install Kastel

Clear pricing, by the size of your company.

Self-host
Free
you host it, the full core
Managed
from €39/ mo
hosted in Europe, on an isolated instance
Enterprise
On quote
compliance, audit, regulated
See all pricing

Need help building your Kastel? Our partner integrators handle it.

Do you operate in a regulated sector?

See Kastel Enterprise

Let’s build your fortress.

Install Kastel
Read our manifesto