The Open-Source TTS Renaissance
2026 is a golden age for open-source TTS. Free, high-quality alternatives to commercial APIs are more capable than ever.
Rankings
| Engine | Best For | Size | License |
|---|---|---|---|
| Kitten TTS | Edge, lightweight | 15-80M | Apache 2.0 |
| Coqui XTTS | Voice cloning | ~500M | CPML |
| Suno Bark | Expressiveness | ~1B | MIT |
| Fish Audio | Zero-shot | ~100M | Apache 2.0 |
| OpenVoice | Style transfer | ~100M | MIT |
Kitten TTS wins for efficiency and ease of deployment. For voice cloning, XTTS and Fish Audio are stronger choices.