Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Birdeye - #1 most trusted reputation and customer experience platform for local business
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
Grade.us - Review marketing and monitoring platform, white-labeled for agencies and SEOs
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Podium - Podium helps your business get more customer reviews, manage customer feedback, customer interaction, and online review management from one software.