Sorry no, we do not manufacture the text-to-speech voices, just the software and applications that utilize this kind of technology.
Audio can be dowloaded as MP3.
As a web application, you can login to use it from both Windows, Mac, Linux computers and all mobile devices. The application may not work as intended if using an outdated browser so please be sure that you're using the latest version of Chrome, Firefox, Edge, or Safari.
Yes! SpeechAS only keeps files locally and for your own usage. The text is sent to our servers only for the conversion process. You can delete the text and voice file after you download anytime. Nothing is kept on a permanent basis. We monitor conversion activity, not content, for security reasons and to make sure the system is working correctly and efficiently.
Yes, we do offer API. Please see upgrade options for the plans with API.