Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
HelpCrunch - HelpCrunch Live Chat: Turn prospects into customers, drive sales and improve retention with a rich toolbox combining modern live chat, in-app messenger, email marketing, CRM and marketing automation.
Crisp Chat - Multi-channel customer support software
Stonly - Create interactive step-by-step guides
Mutiny - Personalize your website for each visitor
Drift - A messaging app that helps you grow your business.