17 · The deal

Terms of service

Plain-language terms: the simulator is free, your projects are yours, don’t abuse the service, and simulation results come with no warranty, so verify before you build.

Effective 4 October 2026. Using Breadboard means agreeing to these terms. They are deliberately short.

The service

The simulator is free and runs in your browser. Paid features may exist later; the core simulator (solver, parts, MCUs, examples, tutorials, local saves, exports) stays free.
Your projects are yours. Anything you design here belongs to you, including anything you later choose to publish or share. We claim no rights over your work.
The service may change or pause. It is provided on a reasonable-effort basis, not under a contractual SLA. Your work is safe regardless: it lives on your machine.

Breadboard's own code

Breadboard itself is separate from your projects. The simulator, the analog and digital engine, the microcontroller emulator cores, the part and device models, the examples, tutorials, documentation and the machine-readable design guide, both as source and as the JavaScript and WebAssembly your browser downloads, are the copyright of Breadboard (breadboard.build), all rights reserved.

You get a limited, personal, revocable right to run that software in a browser through this site. You may not copy it, download it for reuse, extract it from the page, decompile, disassemble or reverse engineer it, host it elsewhere, or use any part of it to build another product or service, except where the law gives you a right that a contract cannot remove (for example the interoperability decompilation right under UK and EU law). Exports of your work, such as project files, images and firmware you built, are yours and are not affected by this.

Third-party and open-source components, and example firmware and sketches distributed under their own licences, including everything served under /firmware/, are governed by those licences. Nothing in these Terms restricts the rights those licences grant. This includes the Arduino-ESP32 and UNO R4 firmware, their relink packages and corresponding source.

Acceptable use

Don't attack, overload, or probe the service or its infrastructure; don't use it to host or distribute anything illegal; don't misrepresent Breadboard's output as certified engineering analysis. That's it.

No warranty: verify before you build

Breadboard simulates faithfully but is provided as is, without warranty of any kind. A simulation is not a substitute for real-world verification: always validate designs with real components, real ratings, and real safety margins before building physical circuits, especially anything involving mains voltage, batteries with real energy, or safety-critical use. To the maximum extent permitted by law, liability for damages arising from use of the service is excluded.

Contact & governing law

Questions, problems, takedowns: [email protected]. These terms are governed by the law of England and Wales.

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