Off-the-shelf software cannot meet every need. If your business has specialized needs, custom software may be better qualified to meet them.
Canned solutions are rigid. The vast majority of off-the-shelf software will not allow you to modify it’s functionality in a meaningful way. It may be difficult to add or remove built-in features, leading to either too many or too few functions for your company.
Off-the-shelf software may not be compatible with other programs. Your business might rely on Software A to complete one task and Software B to finish a second, related task. If the two programs do not communicate effectively, they may hinder your efficiency. If you build your own software, you can integrate with a wider set of APIs from different software and data partners.