The best Interior Design alternative to Autodesk Fusion is FreeCAD, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Autodesk Fusion and three of them are Interior Design Apps so hopefully you can find a suitable replacement. Other interesting Interior Design App alternatives to Autodesk Fusion are SketchUp and DDL - Digital Dry Layout.
Autodesk Fusion alternatives are mainly Interior Design Apps, but if you're looking for
3D Modelers or CAD Software you can filter on that. Other popular filters include
Linux,
Free and
3D Modelling. 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 Autodesk Fusion.
It's the most similar to Fusion 360 while still being free.