In-house development is the process of creating software within an organization or company, using its own resources, technology and staff. Internal development can be conducted both for internal use and for commercial purpose, i.e. for selling the software on the market. In the first case, a company creates software to improve its own processes, increase efficiency and automate business processes. In the second case, the company may create software that can be sold in the market to make a profit. I advise you to read interesting information on this subject https://silicophilic.com/in-house-vs-outsourced-development/.