Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Helpware - Amazing Customer Experiences. Together.
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website
DeskMoz - DeskMoz Provides 24x7 Live Chat Agents for Your Website.
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
HelpSquad - Highly Vetted, Highly Trained chat support and conversion specialists