V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
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
Zoho Desk - Industry's first context-aware Helpdesk Software
Clearbit - Clearbit provides Business Intelligence APIs
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.