Most of the cost of software is not in writing it. It is in the years afterwards — the upgrade nobody scheduled, the bug that reappears, the developer who left with the only copy of how the deploy works.
We build with that in mind. Code that a stranger can read, data models that refuse to hold nonsense, and a handover written down instead of held in someone head. A client who decides to leave should be able to, and take everything with them.
That is an unusual thing to advertise. We think it is the only honest way to sell software.