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Every account starts with three free designs, with no card. After that you pay for finished boards, or bring your own model API key.

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Free designs

A design runs on Koppar’s model keys until your free generations are used. Every schematic you generate, edit or retry uses one; the composer and Settings → Usage show how many are left. A board that fails KiCad’s check is not charged.

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Your own API key

In Settings → Your API keys, add a key from Anthropic, OpenAI or Google Gemini. Runs on your key are not counted against your free designs and bill to your provider account. With more than one key stored, you choose which provider does the work. A key is encrypted before it is stored and never shown again; only its last four characters are displayed. Design work driven from your own agent over MCP, the CLI or REST uses your agent’s model and costs no Koppar generations.

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Prices

Prices are in euros before VAT in Europe, and in US dollars excluding tax elsewhere: set prices, not a conversion. A finished board is one that passed the release gate: Gerbers, BOM and the KiCad project.
Paid plans open in 2027, and there is no checkout yet. Until then every account gets three free designs, and teams on a pilot get boards and seats from us: write to hello@koppar.ai.

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Teams and seats

Create a team in Settings → Team. The owner invites colleagues by email; they join when they sign in with that address, and a pending invitation holds a seat. A design started by a member draws from the team once that member’s own free designs are used. Seats come with a plan or with board credits. On a paid team, edits to an existing design are free. The owner sees the team’s ledger: every plan change, seat change and board credit, with the balance after it.