Autodesk Inventor is described as 'CAD software for 3D design, simulation, and documentation, offering parametric, direct, freeform design options with integrated CAM tools' and is a CAD software in the photos & graphics category. There are more than 50 alternatives to Autodesk Inventor for a variety of platforms, including Windows, Mac, Linux, Web-based and SaaS apps. The best Autodesk Inventor alternative is FreeCAD, which is both free and Open Source. Other great apps like Autodesk Inventor are SketchUp, SOLIDWORKS, Autodesk AutoCAD and Autodesk Fusion.