OpenFOAM primarily operates as a toolbox for C++, requiring users to engage with coding rather than relying on a graphical user interface like ANSYS Workbench. While it is not inherently GUI-based, there are third-party options available, such as Helyx and simFlow, that provide graphical interfaces for easier interaction. Users should be prepared for a programming-centric approach similar to that of ANSYS Classic. The discussion highlights the necessity of coding knowledge for effective use of OpenFOAM. Overall, familiarity with programming is essential for leveraging OpenFOAM's capabilities.