On the Internet, Web sites and search engines can be excellent sources of leads, although the process can be time consuming. Web sites, such as TechTarget.com, have evolved for the specific purpose of making it easy for personnel to obtain leads. Companies have emerged that specialize in lead generation for a fee. They perform the research, and then provide the client with a list of leads. Services of this kind have been used by insurance companies, real estate agents, wholesalers, marketing firms, private investigators, research scientists and educational institutions.
Sales leads are generated on the basis of demographic criteria such as FICO score (United States), income, age, household income, psychographic, etc. These leads are resold to multiple advertisers. Sales leads are typically followed up through phone calls by the sales force. Sales leads are commonly found in the mortgage, insurance and finance industries.