Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
Google Audience Center - 3 votes and 6 comments so far on Reddit
Clearbit - Clearbit provides Business Intelligence APIs
AudienceScience - AudienceScience is an enterprise digital marketing technology solution.
DataXu - Marketing analytics for brands and agencies.