Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
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
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Google Audience Center - 3 votes and 6 comments so far on Reddit