Talon.One - Talon.One is the world's most flexible Promotion Engine.
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
AdCurve - AdCurve is an online campaign management platform for retailers.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
Uniqodo - Uniqodo is cloud-based software for a coupon, voucher or discount code marketing campaigns.
Google Audience Center - 3 votes and 6 comments so far on Reddit