What happens to the code if we leave you too?
The repository is always yours. Delete the application and the git repo is untouched: clone it, move it, self-host it, or hand it to the client. That is the whole point of the exercise.
Can someone else hold the repository instead of us?
Yes. Ownership is organisation-scoped, so the work can run in the client's or the business's own organisation with your people as members, or in yours, and be handed over later.
What does it cost per application?
A development environment is free. Beyond that you pay for the machine tier each environment runs, plus backups and outbound traffic. We're in early beta and are not publishing per-tier rates yet. Pricing will be usage-based, never metered per credit or per token.
Where does it run?
In the EU: eu-central-1 (Frankfurt), on a dedicated instance per environment. That is the only region we run today: good for data residency if your data must stay in the EU, and worth raising early if it must sit somewhere else.