Saysimple - Saysimple is a business communication platform that helps small businesses communicate faster and more effectively with their customers.
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.
Whelp - AI-based Omni channel customer support platform with chat bot system (On premise and cloud based)
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
B2Chat - Instant messaging software to unify all of your chats in one single inbox.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.