CallTrackingMetrics - Know who is calling and how they found you. Maximize the return on your advertising.
Clearbit - Clearbit provides Business Intelligence APIs
Invoca - Call tracking & analytics software
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Scorebuddy - SO WHAT IS SCOREBUDDY ALL ABOUT? Years ago, physical score cards or computer spreadsheets were used to track customer interactions.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.