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
Outbound Apps by Intercom - Embed apps right inside your messages
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Intercom App Store - Integrate with Intercom and grow your business
LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.