Kastel
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Own your intelligence

Your Kastel holds your company’s knowledge. Connect the AIs of your choice, and they become experts in your business.

Join the beta
  1. 01

    You connect your data.

    Each department head picks what Kastel is allowed to read.

  2. 02

    Your Kastel takes shape.

    No data team: it structures your knowledge, and you stay in control.

  3. 03

    You no longer depend on any model.

    Your AIs become relevant to your business, and you switch them in one click.

SlackGmailGoogle DriveNotionHubSpotOrganisationProcessesMemoryRulesClaudePlugged inGPTPlugged inMistralPlugged inOpen modelPlugged in

Your AIs know your records
and how your company works.

Documents

04
Client history
Sales process
Pipeline and offers
Sales arguments

Decisions

CFCamille Fabre approvesSales director
01Discount above 15%
02Opening a key account
03Exception to sales terms

Permissions

Quote AgentClaudeRead
Marc LenoirRead
Follow-up AgentMistralRead

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.

They only see and write what you decide.

You decide what each AI is allowed to see and write to your Kastel, department by department. The rest stays closed to it.

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 ↻

Your Kastel. It belongs to you.

Your data. Your context. You choose where to host them. You can export everything.

Host it yourself

Your environment. Your infrastructure.

We host it for you

In Europe on a dedicated server.

Join the beta

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

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
The blog

The questions we get asked

All articles
New hire arrival5 min

Can a new hire use the company's AI on day one?

Yes, once their read scope is set. Attaching someone to a department is immediate in managed mode, no invitation to accept, and the AI working for them inherits that scope at once: it reads the department's existing pages, no more, no less. What it actually knows depends on something the attachment does not manufacture: what that department had already bothered to write down.

Read the article
Knowledge continuity6 min

When someone leaves, what happens to what they knew?

Whatever was written down in the company's tools stays; whatever only existed in someone's head goes with them, and no tool recovers it. The difference is settled before the leaving date: a governed company memory attaches every page to a department and a named owner, so the successor inherits the read scope, and the AI working for them keeps answering.

Read the article
Access scope4 min

Can you connect an AI to your internal tools without exposing sensitive folders?

Yes, provided the right to read is attached to the responsibility of the person the AI works for, rather than ticked tool by tool. A per-tool box opens the whole tool, sensitive folders included. A responsibility-based rule hands each AI only the slice that person is allowed to read, and nothing else.

Read the article

Let’s build your fortress.

Join the beta
Read our manifesto →