Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Ocamba - An all-in-one marketing solution designed to help you increase your revenue with push notifications, web & mobile analytics, and ad exchange technology.
Plivo - Plivo simplifies your customer engagement.
Braze - Braze is an engagement platform that empowers growth by helping marketing teams to build customer loyalty through mobile, omni channel customer experiences.