tau

Tau is an open-source, browser-based, AI-native CAD platform at tau.new. Designs are written as code, so they are precise and version-controlled, and a natural-language interface creates and modifies designs. A parametric editor adjusts parameters with a real-time preview, and the platform exports to STL, 3MF and slicer-compatible formats. No installation is required to run it in the browser.

Tau is kernel-agnostic: the user chooses the CAD engine for the project. Implemented mechanical integrations listed in the README are OpenRSCAD, Replicad, Manifold, Zoo with KCL, JSCAD, OpenCascade, Build123D on desktop, PicoGK and PicoVoxel, with Onshape, Fusion 360, Curv, ClassCAD and Truck planned. TSCircuit is implemented for electrical design, with Atopile planned. Every project keeps its own ecosystem's files, such as package.json, pyproject.toml or a .csproj, so it runs with npm ci, uv, dotnet, OpenSCAD or the Zoo CLI outside Tau.

The platform also includes a file converter between 39 input formats and 14 output formats, including STL, STEP, GLTF, FBX, 3MF, OBJ and USDZ. The README lists use cases in 3D printing, game development, industrial design, CAD prototyping and academic research.