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Open CASCADE Technology project preview
Developer ToolsAlternative to ACISAlternative to ParasolidAlternative to CGM Geometric Engine

Open CASCADE Technology

Industrial 3D surface and solid modeling CAD kernel and geometric algorithm suite.

View on GitHub Visit website
LicenseLGPL-2.1
GitHub stars2.5k
Last commit1 weeks ago
Tags6 topics
Brep Solid ModelingCad Cam CaeDeveloper ToolsCppGeometric KernelNurbs Curves
Overview

Why consider Open CASCADE Technology?

Open CASCADE Technology (OCCT) is an industrial-grade software development platform for 3D CAD/CAM/CAE applications. Written in C++, it provides 3D boundary representation (B-Rep) modeling, NURBS curves, Boolean operations, and STEP/IGES data exchange.

Guided learning

Learn Open CASCADE Technology by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of Open CASCADE Technology

OCCT serves as the core 3D solid geometry calculation engine behind FreeCAD, CadQuery, and industrial aerospace design tools.

Installation

bash
1# Ubuntu
2sudo apt install libocct-modeling-algorithms-dev

Open CASCADE Technology is licensed under the GNU LGPL-2.1 license with Open CASCADE exception.

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Open CASCADE Technology FAQs

Open CASCADE Technology is listed as a Developer Tools tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

Open CASCADE Technology is listed under the LGPL-2.1 license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

Open CASCADE Technology is listed as an alternative to ACIS. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.