CloudCompare is described as '3D point cloud (and triangular mesh) processing software. It has been originally designed to perform comparison between 3D points clouds only. It relies on a specific octree structure that enables great performances(1) relatively to this particular function' and is an app. There are five alternatives to CloudCompare for Windows, Linux and Mac. The best CloudCompare alternative is MeshLab, which is both free and Open Source. Other great apps like CloudCompare are Autodesk ReCap, 3D Reshaper, Geomagic Verify Viewer and Geomagic Design X.
Both are great, easy to use, and complementary: