The person doing the job of a business concierge offers services:
Competitor's sales figures
and many more
There are several individuals and companies offering this service in every area. All you need to do is hire one among those. Make sure the individual or the company you're hiring is the best there. How would you know that the individual or the company is the best? The reviews of the previous clients would be useful in this.
Try to find out what the previous clients of the company are saying about the company. Are they satisfied with the quality of the service provided? It is advised to go further only you get a positive response from all the research done.