The best open source alternative to Onshape is FreeCAD. If that doesn't suit you, our users have ranked more than 25 alternatives to Onshape and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Onshape are LibreCAD, Dune 3D, BRL-CAD and CADAM.
A powerful open-source parametric 3D modeler ideal for mechanical engineering, supporting Python scripting, running on Windows, Linux, and Mac, with modular architecture allowing extensive adaptability and use with scientific computing libraries.
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.
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.
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...
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.
CaDoodle is a local drag-and-drop CAD application for Linux (Arm,x86), WIndows (X86), and Mac (Arm,x86) and ChromeOS. Users models are stored locally, and the application runs entirely locally. CaDoodle has a drag and drop interface that is cross-trainable with TinkerCAD.
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).
Germany
EU
Netherlands
United States
Slovakia
LibreCAD is for 2D drawings. Onshape is for 3D parametric modeling. The analog would be LibreOffice to vim. While you might be able to get a couple of the same things done in both, they are fundamentally for different uses.