Your AI team · Ready when you are

Hi, we're your agent team.

Ready to save your team a serious amount of time.

Nine specialists for marketing, sales, support, finance and more — working in a closed, GDPR-compliant environment inside Europe.

Start 14-day free trial
No credit cardEU-hostedGDPR-compliant
9 agents online
Closed workspace
Marketing
Sales
Support
Legal
Finance
Operations
HR
Data & BI
Product
Frankfurt + Amsterdam · ZDR · GDPR Art. 28

— The Custos Method —

Six steps. One workflow. Every leak sealed.

The same method for sales emails, contract reviews, customer support, meeting summaries — anything your team does with AI. Learn it once. The whole company saves money forever.

1

Project

Context, structured

2

Knowledge

Your data, indexed

3

Prompt

Right brain, every time

4

Chat

Streaming with context

5

Output

Upgrade only if needed

6

Library

One win, whole team

The leak
The step that seals it
×150The wrong model
STEP 03Custos shows every model's cost per task — you pick the right one with the math in front of you.
×7The sloppy prompt
STEP 03Built-in prompt coach turns a vague request into a structured prompt that works the first time.
×50The lonely top-prompt
STEP 06Winning prompts saved to the team library. One click, whole company uses them.
×0The "no method" tax
STEP 01–06The same workflow every time, for everyone — sales, support, ops, finance.
STEP 03 · PROMPT

The right brain — chosen for you, before you spend.

Write your prompt or let Custos help you build one. Then Custos shows you the available models with the exact cost per task — before you press send. You see Mistral Small can do it for €0.001. You see Claude Opus would cost €0.15 — 150× more for the same answer. You pick. No more guessing.

Seals the wrong-model leak and the sloppy-prompt leak. You stay in control — Custos just makes the right choice obvious.

See real numbers in the cost calculator →
STEP 06 · LIBRARY

One person's winning prompt becomes everyone's default.

A prompt that works gets saved to the team library. The whole company uses it from tomorrow with one click. Your best colleague's brain becomes the team's baseline. Quality scales without training, without onboarding sessions, without anyone documenting their process.

Seals the lonely-top-prompt leak. The smartest person in the room defaults the whole room up.

STEP 01 · PROJECT

Start in the right context. Every time.

Every client, case, or department gets its own workspace. Files, chat history, team members — structured from minute one. Nobody loses context. Nobody pastes the same background into 12 different chats. Nobody starts from scratch when they already had the answer last Tuesday.

Stops the 'what was I working on?' tax that eats ten minutes per session.

— No vendor lock-in —

Four AI providers. One workspace. Zero lock-in.

Mistral, Claude, GPT, Gemini — all in the same chat. Custos tells you which one to use per task. When provider prices change, your team automatically uses the best deal. No single vendor can hold your team hostage. Not OpenAI. Not anyone.

Custos teams cut their AI bill by ~31% on average by routing tasks to the right model instead of defaulting to flagship.

See the math in our cost calculator →

MATCHING TASK TO MODEL

Summarising a 20-page contract…

GPTAI
ClaudeAI
GeminiAI
MistralAI

— Built for European businesses —

EU-hosted only

All conversations stored in Frankfurt and Amsterdam. No transatlantic data flows.

Your data stays yours

AES-256 encrypted at rest. Never used to train any AI model. Ever.

No shadow ChatGPT

One company workspace. No more private subscriptions on company cards. No private chatter mixed with work.

Compliance ready

GDPR-compliant. DPA included. Sub-processors transparently published.

SOC 2 report available on request · ISO 27001 roadmap 2026

Fair pricing · No surprises

One workspace for your whole team

All features included. You pay AI providers directly — we charge €0 margin.

Save 2 months with yearly billing

Workspace

€82,50/month

€990 yearly, excl. VAT

5 seats included · €12 per extra seat

  • 9 AI agents (Marketing, Sales, Support, Finance, and more)
  • All LLM providers via BYOK (OpenAI, Anthropic, Google, Mistral)
  • Team workspaces + shared knowledge base
  • Hard budget caps per user
Start 14-day free trial

No credit card required

Enterprise

Custom

From 100 team members · Custom contract

  • Everything in Workspace
  • SLA guarantee + dedicated support
  • On-premise / self-hosted available
  • Custom DPA + ISO-ready documentation
Request a quote
14 days freeNo credit cardCancel monthlyEU-hostedGDPR-compliant

Frequently asked questions

How does Custos actually reduce my AI bill?+
Custos shows the cost of every model before you send a prompt, so your team picks the cheapest one that handles the task. Most companies default to flagship models like Claude Opus or GPT-4o for everything — even simple emails. With Custos, your team sees that Mistral Small costs €0.001 versus €0.15 for Opus on the same task. They make informed choices. The average team cuts their AI spend by around 31%. Verify with our cost calculator.
My team is small. Is this overkill?+
No. Custos works from a small team up. The shared prompt library means that the moment one person finds a strong prompt, the whole team uses it. From 5 users, the savings on AI tokens typically already cover the subscription.
What if my team won't follow the method?+
The method isn't a process document — it's the UI. Every time someone opens Custos to ask AI something, the steps are already there: pick a project, see the cost, send. There's nothing extra to learn. The shared prompt library is the closest thing to training your team needs, and it works the first time someone clicks 'use this prompt.'
Where does my company's data go?+
Nowhere outside the EU. All conversations are stored in Frankfurt and Amsterdam, encrypted at rest (AES-256), and never used to train any AI model. You also get a signed Data Processing Agreement (DPA) and a public list of sub-processors. Your accountant and your DPO will both be fine with it.
Do I have to bring my own API keys (BYOK)?+
Yes — and that's the point. You connect your own OpenAI, Anthropic, Google or Mistral keys. Custos never charges margin on AI usage; you pay the providers directly. Custos only charges for the platform: €99/month for the workspace including 5 seats.
What happens if my team hits the budget limit?+
Custos stops the call before it reaches the provider. No overage, no surprise invoice. Users get alerts at 50% and 80% of their monthly budget, and at 100% requests are blocked. The cap is enforced in code, not in policy — you set €100, you spend €100 maximum.

Start saving on AI costs today.

14 days free. No credit card.

Start 14-day free trial →