ElevenLabs Voice Cloning and Voice Design API vs Fish Audio Voice Cloning API

ElevenLabs Voice Cloning and Voice Design API

Instant clones from 1 to 2 minutes of audio on the $6 Starter plan. Instant clones rely on an attestation, not a check.

Fish Audio Voice Cloning API

Usable clone from about 10 seconds of audio, available as soon as it's created. No consent or speaker verification in the API.

ElevenLabs Voice Cloning and Voice Design API

1. Keep the source samples. A clone can't be downloaded and re-cloning sounds slightly different
2. Check requires_verification in the create response before using the voice ID
3. List your own clones with GET /v2/voices?category=cloned instead of paging the whole library
4. On system_busy retry with backoff. On too_many_concurrent_requests queue instead, the plan cap won't lift
5. PVC is asynchronous. Create, add samples, verify, train, then poll fine_tuning_state

Fish Audio Voice Cloning API

1. Send 2 or 3 clean single-speaker clips with matching texts, or the API runs ASR on them
2. Pass the model _id as reference_id in TTS. Check state before relying on it
3. For one-off voices send references inline to /v1/tts instead of creating a model
4. Send the model: voice-design-1 header on voice design calls
5. Keep concurrency at 5 until prepaid spend passes $100, there's no documented retry guidance