What it is
A practical CAD workbench
Build parametric parts and structured assemblies in the browser, inspect the exact document, and export normal engineering files. Local CAD needs no account. Agent access is explicit and scoped.
Access
Free, by intent
Yes. PartMode is free to use and is intended to remain free. It is proprietary software.
Maker
About Sphinx
PartMode is made by Sphinx. Sphinx's interests include software, manufacturing, and how practical knowledge becomes repeatable work.
Foundation
Industrial geometry, local control
PartMode uses OpenCascade compiled to WebAssembly, with replicad and three.js. Browser projects, geometry, and recovery history stay on the device unless you explicitly choose a server-headless agent project.