BizProspex - BizProspex offers CRM data cleaning solutions.
Eyeota - Eyeota is a audience data supplier provides marketers with the data they need to reach the right online audiences.
RingLead - RingLead offers a complete end-to-end suite of products to clean, protect, and enhance company and contact information.
dstillery - Dstillery is an advertising technology provider enabling marketers to target prospects through scientific methods.
TowerData - demographic data on email addresses
Datafinder - Datafinder offers self-serve predictive marketing suite offering clients with relevant consumer data.