Red Oxygen offers powerful SMS software that enables you to send business SMS from the convenience of your PC. Email, web browser, or API options. Free trial. Red Oxygen enables businesses and organizations of all sizes to send and receive SMS from the convenience of their computer. We offer a variety of out-of-the-box, no-developer-required software to use with your preferred communication platform—whether that's Microsoft Outlook, Gmail, web browser, or API integration with your company's CRM or database. Or contact us for custom applications or partnering opportunities with profit sharing or wholesale pricing. We urge you to sign up for the free trial, to test it out for yourself