V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Appier - Appier offers next generation cross-screen marketing solutions to advertisers across the globe.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
Drawbridge - Drawbridge is a cross-device technology solution that enables brands to have conversations with consumers.
Google Audience Center - 3 votes and 6 comments so far on Reddit
Hivestack - Hivestack is an AI-based location ad serving platform that helps marketers target customers based on where they are and places they have been.