Clearbit - Clearbit provides Business Intelligence APIs
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
LinkedIn Sales Navigator - Sales tool for LinkedIn users.
BrandWatch - The best social monitoring tool