Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Now Platform - Get native platform intelligence, so you can predict, prioritize, and proactively manage the work that matters most with the NOW Platform from ServiceNow.

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

IBM Watson Assistant - Watson Assistant is an AI assistant for business.

JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website

Tars - TARS enables users to create chatbots that replaces regular old webforms.