Voice Cloning APIs
Voice cloning here comes bundled with text-to-speech, so each provider clones a voice and then speaks with it. ElevenLabs adds dubbing and speech-to-text, Cartesia offers instant cloning with low-latency streaming over WebSocket, and Fish Audio clones from short clips, supports emotion tags and bills per byte. All three run freemium plans with an API key. Free AI APIs →
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
CartesiaLow-latency text-to-speech over HTTP, SSE or WebSocket, plus speech-to-text and instant voice cloning. AI & Machine Learning › Speech | Freemium | API key | Binary | — | Live |
ElevenLabsText-to-speech in 70+ languages with 10,000+ voices, plus speech-to-text, voice cloning and dubbing. AI & Machine Learning › Speech | Freemium | API key | JSON | — | Live |
Fish AudioText-to-speech with emotion tags, instant voice cloning from short clips, and transcription, billed per byte. AI & Machine Learning › Speech | Freemium | API key | Binary | — | Live |
CartesiaFreemiumLive
Low-latency text-to-speech over HTTP, SSE or WebSocket, plus speech-to-text and instant voice cloning.
API key · Binary
—
no machine-readable spec
ElevenLabsFreemiumLive
Text-to-speech in 70+ languages with 10,000+ voices, plus speech-to-text, voice cloning and dubbing.
API key · JSON
—
no machine-readable spec
Fish AudioFreemiumLive
Text-to-speech with emotion tags, instant voice cloning from short clips, and transcription, billed per byte.
API key · Binary
—
OpenAPI spec
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Choosing a Voice Cloning API
Is there a free Voice Cloning API?
Yes. ElevenLabs, Cartesia and Fish Audio have a free tier alongside paid plans. See all free AI APIs.
Which Voice Cloning APIs work without an API key?
All of them need a key or account. ElevenLabs, Cartesia and Fish Audio give one out free when you sign up.
Can I use Voice Cloning APIs in a commercial project?
ElevenLabs, Cartesia and Fish Audio restrict it, for example to non-commercial or attributed use, so read the terms first.
Which Voice Cloning APIs work with AI agents?
Fish Audio publishes an OpenAPI spec for generating clients and tools.
Broader: Speech APIs · AI & Machine Learning APIs
More in Speech: Text to Speech APIs · Speech to Text APIs