Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.
Twilio - Brings voice and messaging to your web and mobile applications.
Flexmail Solution - Professional email marketing with powerful and easy-to-use features
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Awesome Mails - Awesome Mails creates beautiful image map emails, featuring an easy to use drag-and-drop editor...
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates