Free alternatives to SketchUp

Trimble's easy 3D modelling tool, popular in architecture and woodworking. Here are 2 free options, most popular first.

Blender

Mesh & visualisation

Free and open-source 3D creation suite

Stars
★ 21k
Licence
GPL-2.0+
Updated

Alternative to 3ds Max, Rhino

Sweet Home 3D

Architecture & BIM

Free interior design and floor-plan app with 3D preview

Licence
GPL-2.0
Updated

Alternative to SketchUp

Check file compatibility before switching. Free tools import STEP, DXF and other neutral formats well, but native SolidWorks, Altium or Revit files, drawing standards and PDM workflows may not carry over cleanly.