Clearbit - Clearbit provides Business Intelligence APIs
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Plivo - Plivo simplifies your customer engagement.