The AI-native CAD platform — open-source, browser-based, and kernel-agnostic. Design anything from 3D prints, game assets, and more.
🚧 Tau is currently under heavy development. APIs and interfaces may change as we add new features and improvements.
- Open Source — Apache-2.0 across the complete Tau codebase (see LICENSING.md)
- Browser-Based — Run CAD on mobile or desktop, no installation required
- Code-Based CAD — Precise, version-controlled designs through code
- AI-Powered — Natural language interface for design creation and modification
- Parametric Editor — Adjustable parameters with real-time preview
- Multi-Kernel — Choose the right CAD engine for your project
- Embeddable — Components to bring CAD into any web application
- 3D Printing — Design and export to STL, 3MF, and slicer-compatible formats
- Game Development — Create 3D models for games and simulations
- Industrial Design — Create 3D models for industrial design and manufacturing
- CAD Prototyping — Parametric code with version control and instant iteration
- Academic Research — Kernel APIs for computational geometry and educational tools
Tau's multi-kernel architecture lets you choose the best engine for your needs. We support mechanical CAD and electrical design, with plans to expand into firmware development and simulation.
| Category | Type | Implemented | Planned |
|---|---|---|---|
| Mechanical | CAD | • OpenRSCAD • Replicad • Manifold • Zoo (KCL) • JSCAD • OpenCascade (direct libcascade)• Build123D (Desktop) • PicoGK (ShapeKernel) (Desktop) • PicoVoxel |
• OnShape • Fusion360 • Curv • ClassCAD • Truck |
| Sim | — | • FEAScript | |
| Electrical | CAD | • TSCircuit | • Atopile |
| Sim | — | • ngspice • CircuitJS |
|
| Firmware | CAD | — | • Arduino • MicroPython |
| Sim | — | • QEMU • Wokwi |
Convert between 39 input formats and 14 output formats including STL, STEP, GLTF, FBX, 3MF, OBJ, USDZ, and more.
- Discord — Join our community
- Documentation — tau.new/docs
- GitHub Discussions — Ask questions and share ideas
We welcome contributions! Please see our Contributing Guide for development setup and guidelines.
For security concerns, please review our Security Policy.
Please read our Code of Conduct before participating.
Tau is built on a foundation of excellent open-source projects:
| Category | Technologies |
|---|---|
| State Management | XState v6 |
| UI Framework | React 19, React Router, Radix UI, shadcn/ui, Tailwind CSS |
| Workspace Layout | Dockview |
| Code Editor | Monaco Editor, Shiki |
| 3D Rendering | Three.js, React Three Fiber |
| AI Agents | Pi, AI SDK |
| API | NestJS, Fastify, Better Auth |
| Database | Drizzle ORM |
| Git Operations | Isomorphic Git |
| Desktop | Electron |
Special thanks to OpenSCAD Playground for inspiring the browser-based code-CAD architecture.
All Tau-authored code is Apache-2.0, including the applications, internal libraries, tools, examples, published packages, and the GeoSpec engine. It may be forked, modified, embedded, hosted, and redistributed, including commercially, subject to the Apache licence and notice requirements.
See LICENSING.md for repository-wide details, previous-release treatment, and third-party notices.
Full third-party license inventory: license-deps.