eSpeech solves the problem of managing your text to speech synthesis from multiple providers like Microsoft Cognitive Services, Google Cloud Platform, Amazon Polly, and IBM Watson. It provides the platform where you can synthesize the text of any language from all the given providers without needing to worry about the hectic integration process. You just focus on your business model and it will take care of all the other technical aspects of the system.

Demo: https://codecanyon.net/item/espeech-text-to-speech-marketplace-with-saas/35226226