ChatWhale - Gamify your customer communication and loyalty rewards
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Promoter - The Most Effective Way To Engage And Learn From Customers
Crisp Chat - Multi-channel customer support software
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Drift for Enterprise - Automatically turn website traffic into sales meetings