Source code

Source code

Delft3D FM is fully open source (GNU AGPL). However, as (1) the 1D-2D-3D architecture is still subject to change and (2) we have to focus our limited resources, we are NOT promoting this actively.

At this moment 447 people, in 49 countries worldwide, are actively involved in the software development of the Delft3D FM Suite. The support of this limited group is something we can handle, but supporting the current 30.000+ members is not.


In more detail, we would like to emphasize that:

  • Delft3D FM is available under GNU AGPL 
  • we are continuously improving the source code, to be ready for the worldwide open source release 
  • the source code can be shared with everybody, but we are not actively building a worldwide Delft3D FM open source community yet 
  • we do offer support on (a) beta functionality and on (b) source code to a selected group of Partners in Development 
  • we aim at actively promoting Delft3D FM in open source in 2022.


Please note that we are currently switching to using CMake for compilation, both on Windows and Linux. The transition phase is planned to end Q1 2022.


More details can be obtained by joining our Delft3D FM Beta testing program. Please send your request to