Plans and billing

1. 1Try the scratch canvas with no account: 1 AI diagram and 2 AI edits a day, the full manual editor, and PNG, JPEG and JSON export.
2. 2Create an account, which starts a 7-day free trial of Pro, billed monthly or yearly. A card is required, and nothing is charged before the trial ends.
3. 3Use everything: unlimited AI diagrams and edits, saved projects, repository sync, live embeds, sharing, and the MCP server.
4. 4Cancel any time from Manage billing on your profile. Cancel within the 7 days and you pay nothing.

The scratch canvas needs no account, and the prompt box on the homepage opens the same canvas.

• 1 AI diagram a day. Describing a system counts, and so does pasting SQL, Prisma, or Terraform: that is the day's diagram. The limit is enforced server-side and resets daily.
• 2 AI edits a day with the AI panel, on the scratch canvas.
• Manual editing and PNG, JPEG and JSON export, with no daily limit. The diagram is saved in your browser's local storage, so clearing browser data clears it.
• The free allowance is for visitors without an account. An account is Pro or Team: signing up starts the 7-day free trial. A signed-in account without an active subscription has no free AI; it can open and export what it made.
• Connecting an MCP client and listing its tools is open. Calling the tools needs Pro or Team.

Unlimited means there is no counter to watch during normal work. A daily fair-use ceiling sits far above what one person does by hand and exists to stop automated abuse. Reaching it pauses AI until the next day and nothing else.

The same rules apply wherever the work starts: the dashboard prompt bar, the AI panel on the canvas, or an agent calling MCP tools.

• Pro and Team both start with 7 days free, with everything included, MCP and repository sync too.
• A card is required to start the trial. If you cancel before it ends, you are not charged. If you do not, the first payment is taken when the trial ends.
• There is one trial per person. Polar, which runs checkout, refuses a second trial for an email address or card that has already had one.

Start one from the pricing page, or simply by creating an account: signing up goes straight to the same checkout.

Open your profile and choose Manage billing. It opens the Polar customer portal, where you cancel, update your card, and find past receipts. A cancelled subscription stays active until the end of the trial or of the period already paid for, then does not renew.

The precise consequences, once the paid period ends:

• Opening your diagrams and exporting them as PNG, JPEG or JSON: unaffected. They open read-only.
• Public links and embeds you already published keep serving, so a README or wiki page that shows a diagram keeps showing it.
• Deleting your projects, folders and repository connections stays available, and so does taking a project private.
• Editing, AI diagrams and edits, new projects and folders, repository sync, sharing, and the MCP tools wait for a subscription. There is no free AI allowance on an account.
• Repository sync pauses. Each diagram stays as it was at its last sync.

Payments are processed by Polar, our merchant of record, which sends a receipt for every charge. Business details can be added at checkout. There are no refunds for a partial billing period, except where consumer law requires one; write to [email protected] if something was charged that should not have been.

Team is $99 a month, flat, for up to 5 seats, held by the workspace owner and with the same 7-day free trial. Every member gets everything in Pro, plus a shared workspace whose projects belong to the team, need-to-know folders, and member management. See Teams and folders.

Subscribers keep the plan they have, and every account keeps its diagrams. An account without a subscription can still open and export everything it made; editing and AI start again with a 7-day free trial.