Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Drift - A messaging app that helps you grow your business.
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Crisp Livechat - The most modern experience to talk to website visitors
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community