Since neither of these two other tools are dedupers it is kind off a apples vs. oranges comparision. Neither of these products has the capability of finding a properly merging duplicate records that are already in the Salesforce.com database.

RingLead and Web2Lead (our business partner) are incoming filters (and good ones too). The act of pre-filtering in DemandTools is not done with the deduper that Scott / Steve reviewed, it is done with our Discovery modules (FindLeadID, FindContactID and FindAccountID. These modules do have the capability that you are referencing.

Be on the lookout for our new import module to be released before Dreamforce. We are working with 4 very large Salesforce.com customers to spec and battle test “PeopleImport”, The ultimate way to import lead/account/contacts with all the bells and whistles including multiple dedupe passes against other leads, contacts and accounts. Automatic tasking, campaign attachments, event notation and more. It also has the ability to map a save location for “contradictory field values”

Thanks

Mark Esdale
VP Business Development
CRMfusion Inc.