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Twilio - Brings voice and messaging to your web and mobile applications.
GatewayAPI - GatewayAPI is a professional SMS gateway with first-rate services at low prices worldwide. Over 300 million SMS messages are sent annually through GatewayAPI by among other Google, Visma, Pfizer & Samsung.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Sinch - Sinch is a powerful voice and messaging SDK that lets you bring your apps to life with VoIP and...
CallHippo - Easy to use Phone System with World-Class Support
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs