Open-source software is free of licensing fees. Furthermore, it is easy to adapt and enhance with new features. Nevertheless, using open-source frameworks is not for free. Like in closed-source software, no one is an expert on every framework. The total cost of ownership also includes training, adoption, enhancement and maintainance of a framework. It might take significantly more time for somebody new to the project to extend a certain feature than for the person who is familiar with the framework. Furthermore, software has to be maintained. Even if this can be done literally by everybody for open-source software, a professional maintainance agreement with fixed response times is often mandatory in an industrial setting. This ensures your productivity. EclipseSource employs several Edapt committers and offers professional support and training.