Houseparty - Brining empathy to online communication.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Huddle - Huddle | The Enterprise Content Collaboration Platform
WhatsHelp - Communicate personally with your customers via Messenger
WUT - Anonymously chat with friends
Chatra - Live chat software that helps to increase revenue and collect feedback providing an easy way for website owners to talk to visitors in real time.