Clearbit - Clearbit provides Business Intelligence APIs
Drip Scripts - Create automated email sequences in 60 seconds
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Campaign Genius - Send dynamic email content through any platform, instantly.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Polymail Sequences - Simple, powerful multi-stage email campaigns