Comparison
AiCadGen vs FreeCAD
FreeCAD is a capable, free, open-source parametric modeller — and, like AiCadGen, it is built on the OpenCASCADE kernel, so STEP files move between them cleanly. The difference is the workflow: FreeCAD asks you to model manually across its workbenches, while AiCadGen generates a real solid from a sentence. Generate in AiCadGen, then open the STEP in FreeCAD to keep editing for free.
| AiCadGen | FreeCAD | |
|---|---|---|
| Starting point | Plain-English description | Manual modelling |
| Time to first model | Seconds | Minutes to hours |
| Learning curve | None | Moderate to steep |
| Geometry kernel | OpenCASCADE (shared) | OpenCASCADE |
| Output | STEP (AP242), STL, DXF, OBJ | Native + all common exports |
| Cost | Free tier | Free & open source |
| Best for | Fast first models from text | Free manual parametric CAD |
Which should you use?
Both export and read STEP via the same kernel, so they pair naturally: let AiCadGen create the solid from a description, then refine it in FreeCAD at no cost.