There is a MIT license in the repo. In that sense it's open source. It's using "Edge TTS", which I believe means using API keys [1] stolen from Microsoft Edge

There is a MIT license in the repo. In that sense it's open source. It's using "Edge TTS", which I believe means using API keys [1] stolen from Microsoft Edge and hoping Microsoft doesn't sue you, non jolly-roger flying internet users beware. Can't speak to other models and their licenses, I stopped looking after I saw edge-tts since I don't feel the need to use this. [1] https://github.com/rany2/edge-tts/blob/ac41fb85ab2b2b48fef8a5bdc6e050f29c05c6a1/src/edge_tts/constants.py#L4C25-L4C57 https://github.com/rany2/edge-tts/blob/ac41fb85ab2b2b48fef8a...