We are not sure about pricing for now. We shied away from making a form builder. A la wufoo or google forms. This is made to be as close to HTML forms as possible. It's made to work on any static site with any form markup. If you are like us you are picky about your markup and wouldn't think of using an iframe.
makes sense. Since you used angular, I'd love to see JS form serialization that does good markup output. This way, you don't have to build a form builder (but I might), and the tool supports storing these forms in DB easily. Food for thought. I've written something like this already, and it's been very helpful.