Custom software (also known as bespoke software or tailor-made software) is software that is specially developed for some specific organization or other user. ... Custom software development is often considered expensive compared to off-the-shelf solutions or products.
Custom software development is often considered expensive compared to off-the-shelf solutions or products. This can be true if one is speaking of typical challenges and typical solutions. However, it is not always true. In many cases, COTS software requires customization to correctly support the buyer's operations. The cost and delay of COTS customization can even add up to the expense of developing custom software. Cost is not the only consideration however, as the decision to opt for custom software often includes the requirement for the purchaser to own the source code, to secure the possibility of future development or modifications to the installed system.