Side by side
build123d vs DesignSpark Mechanical
Both stand on 3d cad software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacWindows
Choose build123d if you want a free, open-source way to create parametric CAD models in Python, with manufacturing exports and several modeling styles. Consider another approach if you need cloud collaboration or if a required shape cannot be built with the underlying CAD core.
Visit build123d Free plan Windows
DesignSpark Mechanical offers a free entry plan for direct modeling, with advanced file options and assembly tools in paid tiers. Check plan-specific format support and Windows compatibility before choosing it.
Visit DesignSpark MechanicalThe facts
| build123d | DesignSpark Mechanical | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Windows | Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 3 |
| Maker | Not published | Not published |
| Website | build123d.readthedocs.io | rs-online.com |
| On 3d cad software | #17 of 79 | #21 of 79 |
build123d: what it does well
- Free Python package for Windows, macOS, and Linux.
- Supports builder and algebra modeling styles.
- Includes assembly, surface, and sheet-metal tools.
- Imports STEP, STL, and 3MF.
- Exports to several formats, including STEP, STL, DXF, and 3MF.
What to know first
- Some parts may not be constructible by the underlying CAD core.
- Cloud collaboration is not supported.
- Requires working with a Python package.
DesignSpark Mechanical: what it does well
- Explorer is free with no hidden fees.
- Supports 2D and 3D modeling.
- Part library contains over one billion models.
- Engineer includes assembly constraints and exploded views.
- Drawing annotations support four named standards.
What to know first
- Cloud collaboration is not available.
- Creator and Engineer prices are not printed.
- Assembly Tool is available in Engineer.
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