BigPicture.io - BigPicture provides company APIs for data-driven B2B teams.
UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system
Branch Metrics - Build high quality user experiences with best-in-class deep linking, all while measuring the complete journey of your users.
UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.
Adobe Marketing Cloud - End-to-end digital marketing
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.