Kokoro vs Chatterbox
Both are alternatives to ElevenLabs. Here's how they stack up — verified facts, no spin.
Also searched as Chatterbox vs Kokoro — same comparison, one verdict.
Kokoro
TOP PICK82M parameters, Apache-2.0, and the top of the TTS leaderboard.
Kokoro is a remarkably small open text-to-speech model — around 82 million parameters and a roughly 300MB footprint — that nonetheless ranks at the top of the TTS Arena leaderboard. It is released under Apache-2.0, so commercial use is free and unencumbered. Because it is small it runs faster than real time on modest hardware, including a cheap rented GPU, which makes it the most practical drop-in replacement for a per-character API for most teams.
Chatterbox
MIT-licensed voice cloning that beat ElevenLabs in a blind test.
Chatterbox is an open text-to-speech model under the MIT licence with zero-shot voice cloning from roughly five seconds of reference audio, emotion/intensity control, and support for around 23 languages. In a published blind listening comparison, participants preferred Chatterbox-Turbo about 65% of the time against ElevenLabs' roughly 25% — a result worth treating as one data point rather than a verdict, but a striking one for a freely licensed model.
Side by side
| Kokoro | Chatterbox | |
|---|---|---|
| Sovereignty Score | 94 | 92 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | Apache-2.0 | MIT |
| Pricing | Free — weights are Apache-2.0. Costs are hardware only; a rented GPU capable of faster-than-real-time synthesis runs roughly $20–$80/month, and nothing at all if you already own a suitable card. | Free — MIT licensed weights and code. Hardware only; a GPU is recommended for comfortable real-time cloning. |
Kokoro is Macrostack's recommended ElevenLabs alternative, so it's our pick here.
Kokoro
Strengths
- +Apache-2.0 — commercial use with no restrictions
- +Tiny: ~300MB, runs faster than real time on modest hardware
- +Ranks top of the TTS Arena leaderboard despite its size
- +No per-character billing — cost stops scaling with usage
Trade-offs
- −No built-in voice cloning — you use the voices it ships with
- −Fewer languages than ElevenLabs' multilingual models
- −You own the deployment, updates, and uptime
Chatterbox
Strengths
- +MIT licence — the most permissive terms available here
- +Zero-shot voice cloning from about five seconds of audio
- +Emotion and intensity control, roughly 23 languages
- +Won a published blind preference test against ElevenLabs
Trade-offs
- −Heavier than Kokoro — wants a real GPU for smooth cloning
- −Voice cloning carries consent and likeness obligations that are yours to manage
- −Younger project, smaller ecosystem and less documentation
More ElevenLabs head-to-heads
Related alternative guides
Facts verified 2026-07-29. Licenses and pricing change — spotted something out of date? That's a correction we want.