Your source for direct mail, telemarketing, and email marketing data

Gemstone Data is the industry’s leading provider for direct mail lists, telemarketing lists, and email marketing lists. You can login to our data portal and create customized prospecting lists tailored to your specific campaign requirements, run an unlimited number of counts, and download your direct mail lists, telemarketing lists, and email marketing lists in real-time! We update each of our marketing databases monthly, and more importantly the accuracy of every prospecting list you download is guaranteed in writing.