iSpeech, a leading provider of speech technology solutions and mobile applications, has just announced the launch of the iSpeech Publishing Platform which makes it possible to convert text from books, websites, mobile applications and other text-based content into human quality audio. iSpeech also provides a suite of Text to Speech APIs and SDKs for developers to use in web and mobile applications.
If it's speech-to-text services you're after, Vocapia Research is in the game, offering a variety of speech technology services and working with their clients to adapt, fine tune or create products that are relevant for specific applications. One of Vocapia's products is the VoxSigma speech-to-text software suite that is suitable for many languages and a variety of audio data types. The VoxSigma API is available as a Web service via a REST API over HTTPS.