+1 on retool, my company uses retool extensively to build out admin tools for our operations and CX teams. It's incredibly straightforward and easy to hook it up directly to DB's for reading, as well as other query/requests.

Coming from building admin tools in ruby on rails previously, this is incredibly easy and straightforward. If I have the money to pay for retool I don't think I would choose another tool in the future

It's even possible to host it yourself which allows highly regulated industries to use it.

Is Retool usable enough for non-technical people? "It's easy, just wire it up to your REST service" may be scary for non-technical people. Maybe the persona isn't well-defined enough. They're somewhat technical, but don't code.

Spending over a decade programming makes it extremely difficult to reason about the the precise level of "okay, I can do this" from a semi-technical perspective.