Some of the Amazon's voices sound amazing to me, I've actually tested few on them and people couldn't tell they're synthetic. Watson's voices are nice too. (A

Some of the Amazon's voices sound amazing to me, I've actually tested few on them and people couldn't tell they're synthetic. Watson's voices are nice too. (AFAIK Amazon bought Polish company IVONA for their Polly TTS system, which was long regarded to be one of the best)