The best open source alternative to FreeCAD is OpenSCAD. If that doesn't suit you, our users have ranked more than 100 alternatives to FreeCAD and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to FreeCAD are SolveSpace, BRL-CAD, LibreCAD and Dune 3D.
OpenSCAD is a software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and MacOS.
Assurance of code based parameters
SolveSpace is a parametric 3D CAD program with extrude, revolve, union and difference functions. Save/Export as DXF, PDF, SVG, STL, STEP. Mesh generation expected by most 3d printers. Constraint solver point tracing for motion analysis.
BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for...
LibreCAD is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.
The major difference is that LibreCAD is 2D while FreeCAD is 3D
FreeCAD = 3D LibreCAD = 2D
LibreCAD is 2D, FreeCAD is 3D
Dune 3D operates as a parametric 3D Computer-Aided Design (CAD) software. It provides users with the capability to sketch and constrain both in 2D and 3D dimensions. Furthermore, it allows for the addition of chamfers and fillets to designs.
QCAD is an application for computer aided drafting in 2D. With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schemas and diagrams.
Easy to use, well maintained and regularly updated - rock stable
CAD Sketcher is a free and open-source project looking to enhance precision workflows in Blender by bringing CAD like tools, features and usability to Blender.
MakerSCAD is a web-based parametric 3D design software with a block-based programming language to create objects for 3D printing, animations, games and websites.
SolidWorks is a CAD software that can be used to create parametric models, assemblies, and drawings. It's typical to work with relationships (the alignment of elements with one another) and dimensions (alignment through values).
CadQuery is an intuitive, easy-to-use python based language for building parametric 3D CAD models. CadQuery is for 3D CAD what jQuery is for javascript. Imagine selecting Faces of a 3d object the same way you select DOM objects with JQuery!
An add-on for beautiful, detailed, and data-rich OpenBIM with Blender. It was named BlenderBIM until 2024. It uses the ifcopenshell.
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Both can do parametric modelling. While OpenSCAD focuses on your whole design being described in code, FreeCAD allows you to draw a sketch and add parameters as needed.