speechelo is ancient history those voices are a dead giveaway for low-quality spam and will kill ur retention on any platform . elevenlabs is the king of realism for a single high-end project , but if ur building a mass-gen fleet u’ll go broke on their credit system pretty fast
we shifted most of our high-volume tts work to fishspeech running on local gpu pods . bit of a setup curve compared to a web ui but the output is scarily human and u own the infrastructure . if u don't have the hardware for that , at least look into openai's tts-1-hd api its way cheaper for bulk and the onyx or shimmer voices pass the human sniff test significantly better than any $47 legacy software
one thing to watch for platforms are getting aggressive at flagging account clusters based on the audio fingerprint . if u use the same pre-made voice across 50 channels without any variation , u get a shadowban loop . we always run a post-processing pass through an ffmpeg script to add faint ambient noise and shift the pitch slightly to break the digital signature
stick to the apis or local models if u want ur accounts to survive