OpenCossan logo The OpenCOSSAN Engine is an invaluable tool for uncertainty quantification and management. It represents the core of COSSAN software. All the algorithms and methods have been coded in a matlab toolbox allowing numerical analysis, reliability analysis, simulation, sensitivity, optimization, robust design and much more. Released under the LGPL license, the engine can be used, modified and redistributed free of charge. It is supported by an extensive documentation and tutorials.


OpenCossan: Development Version

OpenCossan Development Version contains not only new capabilities and toolboxes, but significant changes in the code structure that simplify the user interaction and the maintainability of the software. The new version of OpenCossan has the necessary capabilities to handle cutting-edge concepts and analyses like imprecise probabilities.

OpenCossan: Stable Version


OpenCOSSAN can only be used via Matlab command line interface. This interaction method is especially offered to provide a high-level programming environment for advanced users.

OpenCossan Apps

OpenCOSSAN Engine Matlab Interface Using the command line interface, users and researchers can modify pre-written solution sequences, explore data, implement new algorithms, and more. This offers the abilility to simply create custom tools, which enable the solution of specialised problems.

If you are looking for a more user friendly and intuitive interface you should consider using COSSAN-X.

Shared development

The OpenCOSSAN Engine is developed by a large number of researchers from all over the world. You can download the engine, check the code, implement new features and propose patches and modifications. We really value your feedback!

OpenCOSSAN account registration is now open! Register here to signup and receive your login details. Then, OpenCOSSAN can be downloaded from user area section of this website.