Speech Central is described as '? The best text-to-speech experience - our proprietary engine significantly enhances the output of Apple's voices and AI voices (OpenAI, Azure, Google) by infusing their readings with emotion and variation' and is a Text to Speech service. There are more than 50 alternatives to Speech Central for a variety of platforms, including Windows, Mac, Web-based, Linux and iPhone apps. The best Speech Central alternative is Read Aloud Extension, which is both free and Open Source. Other great apps like Speech Central are Balabolka, Kokoro, NaturalReader and eSpeak.