In addition to searching for articles on specific companies similar to your proposed business, look for information on the entire industry. You can use keywords to identify your industry or search by NAICS codes. The image below illustrates how to search by NAICS code. Note that the pull down arrow by theSelect a Field box has been used to change the choice to IC NAICS Code. Both Business Source Complete and Regional Business News allow searching by NAICS code.
This search reflects a search by someone interested in the industry identified as 541219 (Accounting services not CPAs) and the billing services portion of that industry.