Clearbit - Clearbit provides Business Intelligence APIs
6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.
Neustar - A trusted, neutral provider of real-time cloud-based information & analysis to the Internet, telecom, financial, media & advertising and retail industries.
LeadIQ - VP of Sales. Every second in sales counts. You hired your sales team to sell, not do data entry. LeadIQ will pump up your sales team with accurate prospect data and a smooth workflow so you can fill up your pipeline faster.
BigPicture.io - BigPicture provides company APIs for data-driven B2B teams.
LeadFuze - B2B Lead Generation & Sales Prospecting Software.