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

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

ChatWoot - Open-source omnichannel customer engagement platform

MomentCRM - MomentCRM is a platform for support, sales, marketing, and product development.

HelpCrunch - HelpCrunch Live Chat: Turn prospects into customers, drive sales and improve retention with a rich toolbox combining modern live chat, in-app messenger, email marketing, CRM and marketing automation.

Chaskiq - Turn strangers into leads, maintain data ownership. Easy to install, develop, and measure.