The best 3D Printing alternative to Spline is SketchUp. It's not free, so if you're looking for a free alternative, you could try Womp. If that doesn't work for you, our users have ranked more than 10 alternatives to Spline, but unfortunately only two of them are 3D Printing Tools.
Spline alternatives are mainly 3D Animators, but if you're looking for
3D Modelers or 3D Printing Tools you can filter on that. 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 Spline.
Took me just 1 video to learn Womp - so easy, I love using this app