I simply want use a platform that I can connect to an API that has company information, so I can build lists quickly. Is there a software service that does this already? I'd rather not code it.
What kind of company information? Name, address, phone? Or something more detailed like # employees, revenue, and email address? For the former, try http://www.factual.com/.
I'm not worried about the data sources. I'm wondering if you know of a user interface that simply builds lists and connects to databases? Not sure if I am explaining this well. Does that make sense?