One advantage of open source (content management) systems is obvious: download and use are free of charge. This would even make it possible to test different systems for one's own website, since there are no costs for use. In addition, open source systems offer other advantages that should not be underestimated. Since the code is freely accessible, an active community gathers around almost every open source CMS, which works on extensions and the development of the respective system. With the necessary technical skills, such a system can be flexibly adapted to your own or the community's desired requirements. Often, additionally developed plugins and functions are also free of charge.