No matter what type of app you are thinking of, one that would simplify the process or provide B2B integration solutions, or one that would imply integrated data analysis, without a business intelligence database it would be hard to accomplish, especially if you are thinking about big data integration. Moreover, aside of the time and money you'd have to waste on 1) collecting the information you’d need and 2) on formulating a sound data integration strategy to base your API application on, and 3) only then build the API itself, you might also miss the business opportunity that has made you start the entire process in the first place, especially if a competitor does that faster than you and enters the market before you do.

The good news is that the latest B2B integration trends show, that the API data integration architecture is built in a more friendly way so that it becomes a lot easier to apply to data integration solutions without too much hassle, or oftentimes without any trouble at all. Business directories’ APIs, most often, are ready-made for both web data integration and mobile data integration, generally being qualified for immediate B2B data exchange. How else could you deliver value to your target users, if you don’t offer them what they need right away? Of course, giving it all at once may not be that smart of a business decision unless you have a continuous monetization system (affiliate and/or subscription-based). Otherwise, the service you provide would bring you nothing else but losses.
Therefore, with data provided by business intelligence platforms, you get a white label solution for the application you are willing to build, cutting-off resources and time allocated to collecting, continuous updating, loading, verifying, improving the quality of data as well as from many other actions you’d need to perform. As the quality of company data is the providers’ job, and as the APIs implied usually deliver integrated data solutions, you can focus on the improvement (if needed) and sales of your app.
To sum up…
Building an app is never easy, and requires a big bunch of resources. However, B2B data providers come up with data integration solutions, by offering both information and API data integration. When applying to company directories, you save time and money (especially in the case of big data integration) and can redirect your business efforts towards the enhancement of the features of your app as well as towards its marketing and sales.