CleverTap - CleverTap offers blazing fast analytics, powerful real-time segmentation, multi-channel messaging, A/B testing and personalization in one unified solution.
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
Apple App Analytics - Apple's very own iTunes Connect App Analytics
Zoho Desk - Industry's first context-aware Helpdesk Software
Callcounter.eu - Callcounter gathers API usage data and gives you insight in trends, slow parts and errors.
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.