A lot of what we're trying to do is abstract some of the backend systems to allow for quick building. When you make a form, we host it on our servers, provide an accounts system for inviting team members and a permissions system for controlling access. Right now we're working on securely implementing both custom SQL queries and javascript-based scripting for backend validation and frontend customization.
We're still working on exposing lower-level operations to advanced users. I'd still say we're a database builder, since we provide a system for making relational connections, and allow all CRUD operations on records. A form builder would probably only provide Create.
The accepted keywords for this kind CRUD-application builder are pretty generic, to be honest. The biggest one that I see used is "Online Database", which is so broad it's nearly meaningless.
