Pricing
Pay for cloud and scale. Modelling is free.
Every importer, every export and the whole modelling surface are in the free edition. Prices are in EUR and exclude VAT — VAT is added at checkout where it applies.
Free
€0forever
The whole modelling surface, and every import and export.
- 2 diagram slots
- Every importer: SQL, Prisma, Drizzle, DBML, Mermaid, BPMN 2.0, PlantUML
- Every export: .uaml, Markdown spec, SQL, DBML, Mermaid, PlantUML, images
- Share links — private, invite-only or public
- The AI agent with your own Anthropic key (BYOK), no surcharge
- Extra slots €1 / slot / month, in packs of 5 (€5 / month)
Studio
€12/ month
or €96 / year — €8 / month, save 33%
For the developer who keeps more than a couple of systems modelled.
- 20 diagram slots included
- Full cloud save — your models on every machine you sign in from
- Versions and backups
- Works offline — cloud diagrams update when you save
- Extra slots €1 / slot / month, in packs of 5 (€5 / month)
- Everything in Free
Unlimited
€29/ month
or €264 / year — €22 / month, save 24%
For teams. No slot arithmetic, and the agent runs on the house.
- Unlimited diagram slots
- 3 seats included
- Extra seats €4 / seat / month, −10% from the tenth — up to 49
- €5 of AI credits granted every month
- Priority support and priority feature requests
- Everything in Studio
Founders Edition
€79one-time
First 500 keys. A perpetual licence, not a subscription.
- Unlimited offline storage and backups, perpetually
- €10 of AI credits, granted at purchase
- 12 months of updates included — the version you hold runs forever
- The Windows desktop app when it shipscoming
- Price grandfathering — your rate never moves
- No cloud features; pair it with a subscription if you want those
Founders is a flag on your account, not a tier — it coexists with any subscription.
Get a Founders keySeats
Unlimited includes 3 seats. Extra seats are €4 per seat per month and get cheaper as the team grows — the bands are graduated, so each seat is billed at the rate of its own band.
Up to 49 extra seats can be bought in the app. Past that we would rather talk to you than guess — get in touch and we will quote it.
Extra diagram slots
A slot is one saved CLOUD diagram — diagrams kept offline in your browser are unlimited on every edition and are never counted. Free comes with 2, Studio with 20. Need more without moving up a tier? Add slots for €1 per slot per month, sold in packs of 5 (€5 per month), on Free and Studio. Unlimited has no cap, so the add-on does not apply to it.
Add slots in the appAI credits
Or bring your own key and pay us nothing
The in-app agent runs either on your own Anthropic API key — free, we take no cut — or on credits, if you would rather not manage a key. Credits are denominated in EUR and are spent as the agent works. Unlimited is granted €5 of credits every month.
€5
€5 of credit
€20
€20 of credit
€50
€55 of credit
Any signed-in user can buy credits — including on the free edition. Bringing your own key stays free forever.
Founders Edition
First 500 keys
A one-time purchase for people backing this early. It is a perpetual licence flag on your account — not a subscription and not a tier. It coexists with any plan you later choose, and it does not include the cloud features.
- Unlimited offline storage and backups, perpetually
- €10 of AI credits, granted at purchase
- 12 months of updates included — the version you hold runs forever
- The Windows desktop app when it ships coming
- Price grandfathering — your rate never moves
- Checkout closes for good once the 500th key is sold
The small print, in plain words
VAT
All prices exclude VAT. The correct rate is calculated and added at checkout, based on where you are.
Cancelling
Monthly plans renew monthly, annual plans annually, until you cancel. Cancel from the billing portal in the app; you keep access until the period you paid for ends.
Your models
Every edition exports the full model — .uaml, SQL, DBML, Mermaid, PlantUML, Markdown. Nothing you build is held hostage by a plan.
Questions before you buy
Ask on the contact page. If something on this page is unclear, that is our bug.