i've had some luck with using Claygent to do general research by company, a lot of the info comes from press releases, linkedin, and news articles
you could maybe do a flow of prompts like this
"google 'is /comany + /domain a franchise?'"
if no info is found, look for press releases and linkedin posts that mention /company and "franchise"
look at Franchising websites like IFPG, Franchise Direct, IFA etc for any information on /company
i haven't done this to find franchises but i have to determine if a company is shrinking, stable, or expanding. Claygent does pretty well if you give it steps to follow. Biggest issue for me is getting it to return a simple yes/no or one word answer cause it loves to return a paragraph of knowledge lol