RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Clearbit - Clearbit provides Business Intelligence APIs
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.