CATIA is the defacto industry leader in 3D CAD. AutoCAD is the defacto industry leader in 2D CAD (given got some 3D support too). Though as more and more compa

CATIA is the defacto industry leader in 3D CAD. AutoCAD is the defacto industry leader in 2D CAD (given got some 3D support too). Though as more and more companies are moving to 3D CAD, they are looking for 3D CAD software built from the ground up for 3D CAD. 3D CAD is not just 3D, it's about parametric geometric kernel, CAM, CAE. AutoDesk's "real 3D CAD" is called Autodesk Inventor. Competitors are SolidWorks, Solid Edge, Siemens NX, PTC Creo Direct/Pro, CATIA, FreeCAD.