Littleton, Colorado-based netFactor, a web lead and search engine marketing firm, and Jigsaw, a provider of business contact information, have partnered. netFactor said that it will include Jigsaw business contact information in order to allow its users to have real-time access to visitor information, without requiring registration. The two companies will link netFactor's VisitorTrack software to Jigsaw's database of business and contact information, in what the company calls "Caller-ID for Websites". netFactor's VisitorTrack software provides information on what companies are visiting a web site, in order to help drive sales. The link provides additional contact names and information pulled from Jigsaw's contact and leads database.