True. every business is unique and so does the requirement for the software system. The customized software is developed from scratch to meet business-specific needs. Developing advanced functionalities, designing appealing UI, and ensuring robust security increases the upfront cost. Furthermore, in order to create such a software system you will also require the manpower that takes the overall budget up. Depending upon your product requirement you may need to hire team members such as designers, developers, QA, testers, analysts, managers, and many other which looks like you have hired a whole town to build your software. But everything pays off with improved user experience, increased sales and profit, seamless integration with the existing system (if you have any), and post-development support. So even though it feels that building custom software is expensive you must not forget the benefits that it will provide over a long time.