Pyyan / Compare / Cartesia Sonic 3 vs Fish Audio S2 Pro
Cartesia Sonic 3 vs Fish Audio S2 Pro
2 of 5Voice & Audio · verified 13 Aug 2026
Cartesia Sonic 3Cartesiacurrent
Fish Audio S2 ProFish Audiocurrent| Specification | Cartesia Sonic 3 | Fish Audio S2 Pro |
|---|---|---|
| Summary | Fastest commercial TTS. | Top open-weights TTS. |
| Arena Elo | — | 1123 |
| Price ($/M chars) | — | $15 |
| Clone from | 3s | — |
| Open weights | No | Yes |
| Category | Voice & Audio | Voice & Audio |
| Official | Cartesia ↗ | Fish Audio ↗ |
Highlighted rows are where these differ.
Cartesia Sonic 3
- 40–90ms time to first audio
- Clones from 3 seconds
- Built for turn-taking
Best for phone agents.
Fish Audio S2 Pro
- 80+ languages, 50+ emotion controls
- Roughly six times cheaper than ElevenLabs
Best for self-hosting.