What are some alternatives?
When comparing Makebox AR and Oculus Medium, you can also consider the following products
Ameyt World - Block-crafting for Augmented Reality
MasterpieceVR - Powerful VR sculpting & painting tool
Snap Art - Snap's augmented reality platform
A-Painter - Paint in VR in your Browser
AR Fidget Spinner - Fidget spinner, re-imagined in AR
Tilt Brush by Google - Paint in spaces around you with Virtual Reality