Yes. You absolutely own the software that you have paid us to develop. You may do anything you wish with this software, from giving it away for free, to selling it to another party. We retain no rights to it. If a future customer approached us with a similar idea, we would recommend they contact you to purchase rights to use your software.

When we develop software, we look at the final product as an important asset that we strive to make as valuable and robust as possible.