Free · open source · every trade
A building model you can open in a browser, free.
MutinyBIM is an open-source building model for every trade: plans, 3D, sheets and schedules, with several people editing the same model live. Bring your own AI assistant to work beside you.
Your models, saved.
Open them from any computer, with branches and saved versions kept.
Work together.
Share a model with a colleague to view or edit, and see each other's changes live.
Your AI, your bill.
Paste your own Claude, ChatGPT or Grok key, or connect your assistant app. This app pays for no AI and never sees your key.
Open source.
The same engine runs on your own computer with npm run demo.