Quotes sent. Orders entered. Invoices matched.
The email comes in. The work gets done.
Custos reads your business email, looks up the answer in the systems you already run — your shop, your warehouse, your invoicing — takes the action, and replies. Your team only hears about it when their judgement is needed.
Start 14-day free trialCan you send me a quote for 250 units?
Incoming · sales@yourcompany.eu · via Outlook
Quote ready — sent after one-click approval
Drafted automatically in 40 seconds
We plug into the stack you already run.
Works in the mailbox you already have
Microsoft 365
Outlook · Exchange Online
Google Workspace
Gmail
No migration, no forwarding rules to maintain — Custos connects to your existing mailbox.
E-commerce
Shopify · WooCommerce · Lightspeed
Fulfilment / WMS
Picqer · Montapacking
Finance & CRM
Moneybird · Exact · Mollie · HubSpot
No migration. No new tool to learn. Custos connects to your existing systems and does its work there.
All trademarks are the property of their respective owners.
— How the engine works —
Six steps. Zero effort for your team.
The same engine for quote requests, repeat orders, invoice questions, delivery updates — every email your business receives. Configured once for your workflows. Then it just runs, quietly.
Read
Every email understood, attachments included
Look up
Prices, stock, orders — from your systems
Decide
Your rules: automatic, approval, or human
Act
Quote drafted, order created, invoice matched
Reply
Complete answer, in your tone of voice
Report
Full audit trail of every action
Revenue never waits in an inbox
A quote request answered in minutes, not after the weekend. Repeat orders entered the moment they arrive.
No more copy-paste work
Order entry, invoice lookups, status updates: done automatically in the systems you already use.
A human only where it counts
Approvals and edge cases reach your team with full context attached — one click to decide. That's the whole job.
We handle the AI. You get one invoice.
No API keys to manage, no models to pick, no separate AI accounts. Custos runs the right AI for each task on EU-hosted infrastructure, with a generous fair-use AI allowance included in your plan. One flat price. No surprises on your invoice. Ever.
See what's included →Platform
Fair-use AI usage included
Quote #Q-2107
approved via Slack, sent
Order #8412
created in Shopify + Picqer
Invoice query
matched in Moneybird, answered
— Built as a human-exception workspace —
The engine does the work. You handle the exceptions.
Every customer runs on the same proven engine — your workflows are configured on top. Which emails run fully automatic, which need approval, what your tone of voice is: set once, adjusted whenever your business changes. Logging in is optional — approvals arrive in Slack, Teams or a one-click magic link, and the work happens in your mailbox and your systems. When you do want to look, your dashboard shows every case, every action, every decision.
— 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 AI
Business email handled in one controlled, compliant flow — not in private ChatGPT tabs on company cards.
Compliance ready
GDPR-compliant. DPA included. Sub-processors transparently published.
SOC 2 report available on request · ISO 27001 roadmap 2026
One price. Everything in.
Custos
excl. VAT, per company
Generous fair-use included — no separate API bill.
- Business email handled by the engine — quotes, orders, invoices and more
- Your integrations connected — shop, warehouse, finance
- AI usage at cost, with a monthly budget cap and alerts — never a surprise invoice
- EU-hosted, GDPR-proof, DPA included
Onboarding — free for founding customers
Normally a paid service. We personally connect your mailbox and systems, configure your workflows, and stay close through the first weeks. Limited to our founding cohort.
No credit card required