I run a directory and intend to charge per lead/enquiry a vendor gets through the marketplace site. Is there a free or paid tool that will keep track of leads a vendor gets and automatically charge them at the end of the month?
What do hippages and homeadvisor use to charge per enquiry/lead their vendors get?
For call tracking, you can use IOVOX or Dialpad. For inquiries via a form, you can just build in a reporting feature that each vendor can see or use a CRM/lead distribution software.
Homeadvisor has their own custom-built system to manage communication between clients on both side of the platform. The factors that go into pricing are three-fold, lead/inquiry, advertising spend, and jobs won. You could find details out if you'd just pretend to be a contractor signing up for the platform, and you should. The way these referral companies make money is far more complex than your question suggests you assume.
No, there's no off-the-shelf software doing what you want.
CFL is not your research tool for how to build your specific business. Stop asking the same questions here again and again and start doing your firsthand research, which will teach you what you need to know about your target market and competition.
Perhaps you understand that the contractors are not happy with the current options and you're looking to do something different for them. There are many reasons that contractors don't like these platforms. And there are some very common ways they abuse the platform to get around the things they dislike about these existing marketplaces. As a consumer, I dislike them too.
That's your best niche, addressing what the competitors have not. You don't need to figure out the tools yet. You need to figure out how to win customers and draw their interest away from the methods they have of getting leads or finding contractors today.
It boils down to a quality issue. It's too easy for worthless leads to get through. And contractors are not generally lacking for leads. Contractors are not interested in responding to leads that won't turn into business. They want jobs, not leads. And they're generally not very comfortable with technology. Solve these persistent problems and you might have a lucrative business. But if it was easy to solve, someone would already be doing it.