Direct SMS - Direct SMS is an SMS API & SMS Software provider specializing in SMS services in Australia.
Twilio - Brings voice and messaging to your web and mobile applications.
Twilio SMS - Send and receive text messages globally with Twilio SMS.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
nimbusIT API SMS Service - nimbusIT API SMS Service is a website that persuades you to send bulk SMS on smartphones for digital or online marketing of a specific brand and logo.
Clockwork SMS - Clockwork is an Easy Text Message API. An SMS API for Developers. Build powerful apps and include SMS. Signup is free, Try it now.