Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Live Chat by Landbot - Live chat that combines chatbots with human chat
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
Tolstoy - Communicate with interactive videos
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website