Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.

Demografy - Demografy is a SaaS platform that uses AI to predict customer demographics from names. It provides full coverage, accuracy estimate before purchase and work with even masked names enabling privacy and GDPR-compliance.

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

Datafinder - Datafinder offers self-serve predictive marketing suite offering clients with relevant consumer data.

Google Audience Center - 3 votes and 6 comments so far on Reddit

DTScout - DTScout provides global behavioural and demographic audience data.