Proprietary systems are technologies and solutions controlled by a single manufacturer, featuring specific standards and interfaces. Compatibility is generally restricted to solutions from the same manufacturer. This closed architecture has both advantages and disadvantages in building management. On the plus side, proprietary systems usually offer comprehensive support from the manufacturer, regular updates, and enhanced security standards. The components within the system are also optimally integrated. However, reliance on a single manufacturer can lead to higher operating costs and dependency on one supplier. Integration with other hardware and software components is not possible, which can limit usage and customization options. In intelligent building management, proprietary systems provide high reliability and security, but they also present challenges due to their limited flexibility.