Autodesk Alias is described as 'Design, conceptualize, and surface models in one pipeline, with collaboration, VR design, automated surfacing, algorithm-based tools, and assembly updates' and is a 3D Modeler in the photos & graphics category. There are more than 10 alternatives to Autodesk Alias for a variety of platforms, including Windows, Mac, Linux, Web-based and iPad apps. The best Autodesk Alias alternative is SketchUp. It's not free, so if you're looking for a free alternative, you could try Autodesk Fusion or Ayam. Other great apps like Autodesk Alias are Autodesk Maya, Autodesk 3ds Max, Rhinoceros and MoI - Moment of Inspiration.
Maya is polygonal based like Blender.