Free alternatives to CATIA

Dassault Systèmes' high-end CAD platform used in aerospace and automotive. Here are 2 free options, most popular first.

FreeCAD

3D & parametric CAD

Open-source parametric 3D modeller for real-life objects

Stars: ★ 34.5k
Licence: LGPL-2.1+
Updated: yesterday

Alternative to SolidWorks, Fusion 360

BRL-CAD

3D & parametric CAD

Constructive solid geometry modelling system with decades of history

Licence: LGPL-2.1
Status: Open source

Alternative to CATIA

Check file compatibility before switching. Free tools import STEP, DXF and other neutral formats well, but native SolidWorks, Altium or Revit files, drawing standards and PDM workflows may not carry over cleanly.