The best open source 3D Modeler alternative to ArchiCAD is FreeCAD. If that doesn't suit you, our users have ranked more than 50 alternatives to ArchiCAD and nine of them are open source 3D Modelers so hopefully you can find a suitable replacement. Other interesting open source 3D Modeler alternatives to ArchiCAD are Sweet Home 3D, Dune 3D, Bonsai BIM Add-on and CAD Sketcher.
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.
Open-source, Java-based software that allows users to create detailed floor plans, arrange furniture, and explore the final layout in 3D, assisting in interior design projects with ease and flexibility.
Sweet Home 3D is a good tool for newbies and people "always in a hurry"
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.
An add-on for beautiful, detailed, and data-rich OpenBIM with Blender. It was named BlenderBIM until 2024. It uses the ifcopenshell.
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.
Sverchok is a parametric tool for architects and designers. You can use it to program objects' shapes without knowing any programming languages.
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.
B-processor is BIM software that has been and currently is still developed by the Arhus School of Architecture in cooperation with the Alexandra institute.
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Archicad is a professional BIM-Solution, Sweet home is simple 3D for personal interior design. Nice software, just not the same thing at all.