There is deliberately no price list on this page. The Launch Package carries a fixed price because its scope is fixed and we can stand behind the number. Custom work isn't like that — a login area showing five numbers and one showing five thousand are different builds, and pretending otherwise is how projects end in an argument.
So it's quoted per project, after the call and after we've checked what your systems allow. The quote sets out one fixed price for the build and, beside it, the monthly support it needs, so you see both before any work starts.
If we look at what you need and the honest answer is that an existing tool already does it for a fraction of the money, that's what you'll be told. We'd rather lose the job than sell you a build you didn't need.