The best Interior Design alternative to Autodesk Revit 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 Revit and six of them are Interior Design Apps so hopefully you can find a suitable replacement. Other interesting Interior Design App alternatives to Autodesk Revit are SketchUp, ArchiCAD, Edificius and Home Designer.
Autodesk Revit 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,
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Open Source,
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Mac. 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 Revit.
The FreeCAD BIM Workbench is increasingly a useful alternative to Autodesk Revit. It includes many similar tools and has good IFC support. So while it is not a drop-in replacement, it is viable for smaller projects. Do some research on their forum and see what you think.