Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Clearbit - Clearbit provides Business Intelligence APIs
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.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Stonly - Create interactive step-by-step guides
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.