Clearbit - Clearbit provides Business Intelligence APIs
Synthesio - Synthesio is a social intelligence tool or a marketing software that is specially made for the purpose of social media monitoring and social analytics.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Swift Social - All-in-One Social Media Growth and Management Tool
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
LeadsRX - LeadsRX is a marketing attribution software that gives marketers insights into which advertising campaigns result in conversions.