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RapCAD

Free#78 of 80 in 3D CAD Software3D Modeling Software

RapCAD: A free, open-source CAD environment for code-driven 3D designs and rapid prototyping. Ranked #78 of 80 in 3D CAD Software by our editors (3.0/10); pricing: Free plan; best for programmers creating procedural 3D models.

3.0/10Editor score
Visit RapCAD
RapCAD3.0 Visit RapCAD

At a glance

  • Editor score
    3.0 / 10
  • Pricing
    Free plan
  • Best for
    Programmers creating procedural 3D models
  • Free plan
    Yes
  • Paid from
    Free
  • Facts checked
    19 Sep 2026
RapCAD screenshot

  • Where it wins

    • Define designs with a modular scene-description language.
    • Reuse component modules and design libraries.
    • Run on Windows, Ubuntu Linux, and macOS.

  • Where it doesn't

    • Code-centric modeling may not suit graphical CAD workflows.
    • The documented focus is rapid prototyping, not general mechanical CAD.
    • No verified assemblies or specific file-format support.

Our verdict on RapCAD

RapCAD is an open-source CAD integrated development environment for rapid prototyping, particularly for RepRap and RepStrap 3D printing machines. It is aimed at people who prefer to define designs in a modular scene-description language rather than work through a conventional graphical interface. That makes it a fit for programmers creating procedural 3D models, especially when designs benefit from reusable components and text-based source control.

The workflow is its defining strength. Designs can combine 2D and 3D modeling, use reusable component modules and design libraries, and apply Boolean operations to 3D Nef polyhedra. RapCAD also supports arbitrary-precision arithmetic using GMP and MPFR, OpenGL rendering and display, and multi-threaded operation. These capabilities suit code-centered prototyping and iterative model definition; buyers seeking a primarily visual interface may find the approach a poor match.

RapCAD is free and open source, with official installation options for Windows, Ubuntu Linux, and macOS. Its documented focus is narrower than general-purpose mechanical CAD: the product information does not establish assembly, sheet-metal, surface-modeling, or cloud-collaboration workflows, nor specific file-format support. Choose it for procedural, text-defined prototyping across supported desktop platforms. Consider another CAD tool if your work depends on verified mechanical assemblies, specialized manufacturing workflows, or documented interchange formats.

Your product? Our editors can test RapCAD in depth and publish a review, labelled as paid · from $149/mo →

RapCAD pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on rapcad.org

RapCAD fact sheet

Free planYes
Paid fromFree
Modeling methodNot verified
Assembly designNot verified
Sheet-metal toolsNot verified
Surface modelingNot verified
Cloud collaborationNot verified
Supported platformsWindows, Ubuntu Linux, macOS
File import and exportNot verified
DeploymentDesktop
PlatformsWindows, Linux, macOS
PricingFree plan
Websiterapcad.org
Facts checked19 Sep 2026

Alternatives to RapCAD

See all RapCAD alternatives →

Also Ranked In

RapCAD is ranked in 2 of our directories.

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Featured on iTechGuides

Featured on iTechGuides — RapCAD 3.0/10

RapCAD is listed in our 3D CAD Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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