Resenmble.ai - AI Voice Generator with Text to Speech and Speech to Speech
Custom AI Voice Generator. Create realistic text-to-speech AI voices with Resemble's voice cloning software. Real-time API's and 44kHz audio.
Amazon Polly - Text to Speech Software
Amazon Polly turns text into lifelike speech, allowing you to create applications that talk and build entirely new categories of speech-activated applications.
IBM Watson Text to Speech
Watson Speech to Text is an API that transcribes speech to text in a variety of languages. It’s available as SaaS or for self-hosting.
Piper Voice Samples
https://github.com/rhasspy/piper/blob/master/VOICES.md
IBM TTS