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

GetSiteControl - Website popup builder & email marketing suite for ecommerce

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

Adoric - Adoric is SaaS and enterprise services company which provides solutions for inbound marketing and funnel optimization. 

ChatWoot - Open-source omnichannel customer engagement platform

Conversant - Conversant provides online advertising campaigns and programs for advertisers and advertising agency customers.