Find your way
to build.

Free includes the hardware library, wiring and bill of materials tools, browser upload on compatible devices, HardwareOS Desktop, 3 cloud builds a day, and 1 cloud project.

The limits. Hobby allows 20 cloud builds a day and 10 cloud projects. Pro allows 100 builds a day and 100 projects, and its builds go ahead of lower plans in the build queue. The datasheet library grows from 10 files on Free to 40 on Hobby and 100 on Pro.

Connect an API account from Anthropic, OpenAI, Google Gemini, OpenRouter, or a compatible endpoint. Provider credentials are encrypted and referenced by connection ID; they are never included in project files. ChatGPT, Claude, and Codex consumer subscriptions do not provide transferable API credit.

Yes, on boards that Web Serial can reach in Chrome or Edge. When a board needs a native driver, a mass-storage flow or a vendor tool, the same project opens in HardwareOS Desktop.

HardwareOS Desktop is the native companion to the web workbench. It opens the same projects, builds with local toolchains, and uploads to boards that a browser cannot reach.

Yes. You can change your plan or billing period at any time. Annual billing saves 17% on Hobby and 17% on Pro.

Cancel any time from Manage billing. The plan stays active until the end of the paid period. Monthly plans are not refunded. Cancel any time to stop the next charge. Yearly plans are refunded in full within 14 days when the plan has seen little activity, and otherwise for unused whole months. Additional usage is refunded in full or not at all.

Your projects belong to your account, and other accounts cannot read them. When you use the assistant, the files it needs are sent to the AI provider that answers. Builds run on our cloud builder. AI provider keys are stored encrypted.