Clearbit - Clearbit provides Business Intelligence APIs
SharpSpring - Simple Marketing Automation for Agencies and SMBs
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Lead Forensics - B2B website analytics and lead generation.
LinkedIn Sales Navigator - Sales tool for LinkedIn users.