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FreeCAD vs Siemens NX: catalog facts
FreeCAD	Siemens NX
Free Free and open source, funded by donations and sponsorship.	Paid Commercial enterprise licensing; no free tier.
Windows, macOS, Linux	Windows, Linux
Parametric: change a dimension and the model updates through its history Sketch constrained 2D geometry and build 3D objects on top of it	Integrates CAD, CAM, and CAE simulation in one suite for large-scale product design Widely adopted in aerospace and automotive, so it is a common requirement in those industries
Workbenches vary a lot in polish and consistency CAD concepts plus FreeCAD’s own conventions make for a long learning curve	Aimed at large enterprise teams, with pricing and complexity to match Interactive use is Windows-only, with Linux limited to solvers and batch processing
Downloadable app	Downloadable app
Open source	Closed source
License: LGPL-2.1	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.