Open-source 3D modeling and CAD software in 2026
30 open-source projects, ranked by GitHub stars and how recently each was worked on. FreeCAD leads with 35k stars, ahead of Editor. 30 had code pushed in the last three months. Most common licenses: MIT (11), GPL-3.0 (7) and Apache-2.0 (6). Commercial 3D modeling and CAD software are listed separately.
New this season
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1
SolidCraft tangency-labs
SolidCraft: an open-source parametric 3D CAD application built in pure Rust. Desktop, web, and automation through MCP.
Complete system Experimental You want to try a new open parametric CAD tool for hobby parts.
★ 13k Apache-2.0 Rust Active, pushed today -
2
Openharness autonomous-ai
The ultimate harness for coding agents and beyond. All your agents. All your machines. One command center. Start with code, then follow your curiosity and build across disciplines: CAD, circuits, robots, games and music.
Developer tool Experimental You run several AI coding agents on multiple machines and want one place to supervise them.
★ 1.4k MIT TypeScript Active, pushed today -
3
Multi-Agent CAD Pan-Chera
MAC (Multi-Agent CAD): A decoupled multi-agent framework for text-to-CAD generation via constrained test-time compute
Framework or platform Experimental You research or prototype text-to-CAD for assemblies and can run LLMs locally or via API.
★ 1.1k MIT Python Active, pushed 5 days ago
All open-source 3D modeling and CAD software, ranked
Complete systems you can adopt 13
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1
FreeCAD FreeCAD
Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.
Complete system Production-ready Engineers, makers or small firms need free parametric CAD without SolidWorks or Fusion licences.
★ 35k LGPL-2.1 C++ Active, pushed today -
2
Editor pascalorg
Open-source 3D architectural editor with a local CLI, MCP tools, and practical workflows for humans and AI agents.
Complete system Usable You want to sketch building layouts in 3D and let AI agents help.
★ 25k MIT TypeScript Active, pushed today -
3
SolidCraft tangency-labs
SolidCraft: an open-source parametric 3D CAD application built in pure Rust. Desktop, web, and automation through MCP.
Complete system Experimental You want to try a new open parametric CAD tool for hobby parts.
★ 13k Apache-2.0 Rust Active, pushed today -
4
CADAM Adam-CAD
CADAM is the open source text-to-CAD web application
Complete system Usable Makers want quick printable parts from a description and simple parameter tweaks.
★ 5.4k GPL-3.0 TypeScript Active, pushed 19 days ago -
5
Chili3D xiangechen
A browser-based 3D CAD for AI-assisted, parametric and direct modeling.
Complete system Usable You want real B-rep CAD in a browser without installing anything.
★ 5k AGPL-3.0 TypeScript Active, pushed yesterday -
6
SolveSpace solvespace
Parametric 2d/3d CAD
Complete system Production-ready You want a small, fast constraint-based CAD tool for simple mechanical parts.
★ 4.2k GPL-3.0 C++ Active, pushed 2 days ago -
7
OpenCADStudio HakanSeven12
A CAD application built with Rust — 2D/3D drawing, DWG/DXF support, and GPU-accelerated rendering
Complete system Experimental You need a free tool to open and edit DWG or DXF drawings and accept a young project.
★ 3.8k GPL-3.0 Rust Active, pushed today -
8
Kicad-source-mirror KiCad
This is an active mirror of the KiCad development branch, which is hosted at GitLab (updated every time something is pushed). Pull requests on GitHub are not accepted or watched.
Complete system Production-ready Engineers or companies want professional PCB design without Altium licences.
★ 3.1k GPL-3.0 C++ Active, pushed today -
9
LibrePCB LibrePCB
A powerful, innovative and intuitive EDA suite for everyone!
Complete system Usable Beginners or hobbyists want a simpler PCB tool than KiCad.
★ 3k GPL-3.0 C++ Active, pushed today -
10
Astral3D mlt131220
基于Vue3 + THREE.JS 免费开源的三维引擎及配套编辑器，包含BIM轻量化、CAD解析预览、粒子系统、插件系统等功能。 A free and open-source 3D engine based on Vue3 + THREE.JS and its accompanying editor, featuring functions such as BIM lightweighting, CAD parsing preview, particle system, and plugin system.
Complete system Usable A Chinese-speaking team needs a browser 3D scene editor for BIM or digital twin projects.
★ 2.5k Apache-2.0 JavaScript Active, pushed 3 days ago -
11
Mayo fougue
3D CAD viewer and converter based on Qt + OpenCascade
Complete system Usable You need to view or convert CAD files without a full CAD package.
★ 2.3k BSD-2-Clause C++ Active, pushed 5 days ago -
12
Dune3d dune3d
3D CAD application
Complete system Usable You design enclosures or simple parts and find FreeCAD and SolveSpace awkward.
★ 2.1k GPL-3.0 C Active, pushed 16 days ago -
13
OpenConstructionERP datadrivenconstruction
Open-source construction ERP - BOQ, PDF/CAD/BIM takeoff, AI cost matching, 293 guided cases. 120,000+ priced positions, 44 languages, 190+ modules, cost data for 40+ markets. AGPL-3.0. pip install openconstructionerp
Complete system Experimental A construction estimator or small contractor wants to trial open-source BOQ and takeoff tools with bundled cost data.
★ 1.1k AGPL-3.0 TypeScript Active, pushed 5 days ago
Frameworks and platforms to build on 1
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1
Multi-Agent CAD Pan-Chera
MAC (Multi-Agent CAD): A decoupled multi-agent framework for text-to-CAD generation via constrained test-time compute
Framework or platform Experimental You research or prototype text-to-CAD for assemblies and can run LLMs locally or via API.
★ 1.1k MIT Python Active, pushed 5 days ago
Building blocks for your own system 9
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1
Build123d gumyr
A python CAD programming library
Building block Usable You prefer to model parts in Python code for reuse, version control and parametric families.
★ 3.6k Apache-2.0 Python Active, pushed today -
2
OCCT Open-Cascade-SAS
Open CASCADE Technology (OCCT) is an open-source software development platform for 3D CAD, CAM, CAE.
Building block Production-ready You are building CAD, CAM or CAE software and need an open B-rep kernel.
★ 3.1k LGPL-2.1 C++ Active, pushed 13 days ago -
3
Maker.js microsoft
📐⚙ 2D vector line drawing and shape modeling for CNC and laser cutters.
Building block Usable You generate cut paths or parametric 2D drawings in Node.js or the browser.
★ 2k Apache-2.0 TypeScript Active, pushed 4 days ago -
4
Pythonocc-core tpaviot
Python package for 3D geometry CAD/BIM/CAM
Building block Production-ready You build CAD or engineering tools in Python and need full OpenCascade access.
★ 2k LGPL-3.0 SWIG Active, pushed today -
5
Truck ricosjp
Truck is a Rust CAD Kernel.
Building block Experimental You are building Rust or WebAssembly CAD software and want a native kernel rather than OpenCascade bindings.
★ 1.7k Apache-2.0 Rust Active, pushed yesterday -
6
LibreDWG LibreDWG
Official mirror of libredwg. With CI hooks and nightly releases. PR's ok
Building block Usable You need to process DWG files in open-source software and GPL is acceptable.
★ 1.7k GPL-3.0 C Active, pushed today -
7
Cad-viewer mlightcad
The world’s first fully web-based DXF/DWG viewer and editor that runs entirely in the browser — no backend server required.
Building block Usable Your web app needs to display or lightly edit AutoCAD drawings without a server.
★ 1.2k MIT TypeScript Active, pushed today -
8
GDSFactory gdsfactory
A Python library for designing chips (Photonics, Analog, Quantum, MEMS), PCBs, and 3D-printable objects. We aim to make hardware design accessible, intuitive, and fun—empowering everyone to build the future.
Building block Production-ready A photonics or chip team wants code-driven, reproducible layouts integrated with KLayout and simulators.
★ 1.1k MIT Python Active, pushed yesterday -
9
ACadSharp DomCR
C# library to read/write cad files like dxf/dwg.
Building block Usable A .NET application must read or generate AutoCAD drawings without an AutoCAD licence.
★ 912 MIT C# Active, pushed yesterday
Integrations 2
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1
Text-to-cad earthtojake
Design physical products with AI
Integration Experimental You design simple mechanical parts and want an AI agent to produce manufacturable files.
★ 25k MIT Python Active, pushed today -
2
SolidWorks Automation Skill wzyn20051216
Reliable AI Skill + MCP toolkit for agent-driven desktop CAD automation.
Integration Experimental You run SolidWorks on Windows and want agents to automate repetitive modelling or drawing tasks.
★ 1.7k MIT Python Active, pushed yesterday
Developer tools 5
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1
Atopile atopile
Design circuit boards with code! ✨ Get software-like design reuse 🚀, validation, version control and collaboration in hardware; starting with electronics ⚡️
Developer tool Usable Your hardware team wants software-style reuse, validation and version control for electronics.
★ 4k MIT Python Active, pushed 19 days ago -
2
Tscircuit tscircuit
Create real electronics with Typescript and React
Developer tool Usable Software developers want to design PCBs in code with AI coding tools.
★ 2.9k MIT TypeScript Active, pushed today -
3
CascadeStudio zalo
A Full Live-Scripted CAD Kernel in the Browser
Developer tool Usable You want scripted CAD in a browser with full B-rep operations like fillets and sweeps.
★ 1.5k MIT JavaScript Active, pushed 14 days ago -
4
Openharness autonomous-ai
The ultimate harness for coding agents and beyond. All your agents. All your machines. One command center. Start with code, then follow your curiosity and build across disciplines: CAD, circuits, robots, games and music.
Developer tool Experimental You run several AI coding agents on multiple machines and want one place to supervise them.
★ 1.4k MIT TypeScript Active, pushed today -
5
CQ-editor CadQuery
CadQuery GUI editor based on PyQT
Developer tool Usable You model parts in CadQuery and want a dedicated viewer next to your code.
★ 1.3k Apache-2.0 Python Active, pushed 21 days ago
Compared head to head
Looking for an alternative to
Open-source licenses
- Permissive: 18. Use it anywhere, including in closed products. You keep the copyright notice; Apache-2.0 also grants patent rights.
- Strong copyleft: 7. If you distribute the program or anything built on it, you must release the whole source under the same license.
- Weak copyleft: 3. Changes to the licensed files must be shared, but you can link them into a closed program.
- Network copyleft: 2. Like GPL, and running a changed version as a web service counts as distributing it, so its users get the source too.
Languages
TypeScript 8, Python 7, C++ 6, Rust 3, JavaScript 2, C 2, SWIG 1 and C# 1.
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