The best Game Development alternative to Sketchfab is Verge3D. It's not free, so if you're looking for a free alternative, you could try SEA3D or DX Studio. If that doesn't suit you, our users have ranked more than 50 alternatives to Sketchfab and seven of them are Game Development Tools so hopefully you can find a suitable replacement. Other interesting Game Development Tool alternatives to Sketchfab are Toolbag, Zmodeler, Grit Game Engine and Awakening.
Sketchfab alternatives are mainly Game Development Tools, but if you're looking for
3D Modelers or Animation Makers you can filter on that. Other popular filters include
Free and
Open Source. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Sketchfab.
Verge3D comes with free 3D hosting service