Clearbit - Clearbit provides Business Intelligence APIs
Zint - Zint is a top-of-the-line sales intelligence platform that makes it easier for businesses to find and track their most important prospects.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
RampedUp - RampedUp offers data appending, data cleansing and account based selling solutions for Salesforce.com
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Growthlead.io - Growth Lead is a B2B social selling tool for Linkedin that helps you scale your outreach.