GitHub offers Tortoise TTS pay-as-you-go API, which provides users with text-to-speech capabilities and allows them to easily generate natural sounding speech from text.

The main benefits of this service include:

easy integration into existing applications, pay-as-you-go pricing, and the ability to create natural sounding speech from text.
This service can be leveraged for use cases such as creating automated customer support bots, providing audio content for websites, and providing audio versions of written content.

Screenshots

Tortoise TTS - website homepage screenshot