Clearbit - Clearbit provides Business Intelligence APIs
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Zoho CRM - Omnichannel CRM for Businesses of all sizes
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.