Open CASCADELinux
vs
SolidWorksWindows
Open CASCADE as a Linux alternative to SolidWorks
Updated
Our verdict
Open CASCADE is not a direct drop-in replacement for SolidWorks. It is a geometry kernel, not a complete CAD application. You need a frontend like FreeCAD or Salome to use it. For mechanical engineers relying on SolidWorks’ integrated assembly management and simulation, the switch is difficult. It suits developers or advanced users who want to build custom CAD tools or need a lightweight geometry engine. If you just need to model parts, use FreeCAD with the Open CASCADE backend. Expect a steep learning curve and missing high-level features like automatic drawing generation or complex assembly constraints.
- License
- LGPL-2.1
- Price
- Free
- Latest version
- —
- Rating
- —
What works the same
- Both support parametric solid modeling concepts
- Both can handle surface modeling operations
- Both support standard CAD file formats like STEP and IGES
- Both are used in industrial CAD/CAM/CAE workflows
What is different
- Open CASCADE is a library, not a standalone GUI application
- Lacks built-in assembly management and constraint solvers
- No integrated simulation or CAE modules out of the box
- Requires programming knowledge to extend or fully utilize
- Does not provide automatic 2D drawing generation without external tools
Opening your SolidWorks files
Open CASCADE supports importing and exporting STEP, IGES, STL, DXF, and BREP formats. It does not natively read or write SolidWorks’ native .sldprt or .sldasm files. You must export from SolidWorks to STEP or IGES before importing into applications built on Open CASCADE. This conversion may lose some parametric history or specific SolidWorks features, so verify geometry integrity after transfer.
Switching from SolidWorks to Open CASCADE, step by step
- Install a frontend application like FreeCAD or Salome that uses Open CASCADE
- Export SolidWorks parts and assemblies to STEP or IGES format
- Import the STEP/IGES files into your chosen Open CASCADE-based tool
- Verify geometry accuracy and repair any broken faces or edges
- Rebuild parametric features if needed, as history is often lost in conversion
- Set up any required plugins for drawing or simulation tasks
Key features of Open CASCADE
- C++ API for geometry, topology and meshing
- Support for STEP, IGES, STL, DXF and many other CAD formats
- Built‑in visualization with OpenGL
- Extensible via plugins and custom modules
- Cross‑platform (Linux, Windows, macOS)
- Active community and documentation
- Open source under LGPL‑2.1
- Designed for both commercial and academic use
Frequently asked questions
Can I use Open CASCADE directly like SolidWorks?
No. Open CASCADE is a C++ library. You need a GUI frontend like FreeCAD to interact with it visually. It is not a standalone application.
Does it handle assemblies like SolidWorks?
Not natively. Open CASCADE handles geometry and topology. Assembly management requires additional logic or a frontend that implements it, such as FreeCAD’s Assembly workbench.
Is it free for commercial use?
Yes. It is licensed under LGPL-2.1, which allows both open-source and proprietary commercial use, provided you comply with the license terms.