Cartesia vs Fish Audio vs Rime Labs vs Smallest.ai
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Cartesia
Ultra-low-latency voice AI on Mamba SSMs
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Fish Audio
TTS and voice cloning with #1 leaderboard ranks and 10-second clones
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Rime Labs
Agent-grade TTS built on real human speech — sub-100ms, 300+ voices, e...
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Smallest.ai
Small, fast speech models: sub-100ms TTS and cheap multilingual STT
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| RECATOOLS Score | 7.6 / 10 | 7.4 / 10 | 7.4 / 10 | 7.3 / 10 |
| Capability | ||||
| Value for money | ||||
| Ease of use | ||||
| ASEAN readiness | ||||
| API quality | ||||
| Pricing | Paid | Freemium | Freemium | Freemium |
| Free tier | — | — | $100 in free credits on signup (no time limit stated) | — |
| Paid from | — | — | From $0.03/1K (Mist); $0.04/1K (Arcana); $0.05/1K (Coda); Enterprise custom | — |
| Has API | ✓ | ✓ | ✓ | ✓ |
| Open source | ✗ | ✓ | ✗ | ✗ |
| Free to use | ✗ | ✓ | ✗ | ✓ |
| Users | — | — | Serves Fortune 500 and major restaurant brands | — |
| Founded | 2023 | — | 2022 | — |
| Maker | — | — | Lily Clifford (CEO, Stanford NLP PhD dropout), Brooke Larson (PhD linguist, ex-Amazon Alexa), Ares Geovanos (Stanford engineer, product veteran) | — |
| Verdict | Cartesia's Sonic models are a leading choice for real-time text-to-speech, prized for very low latency and natural prosody, making them well-suited to voice agents and interactive applications. The API is developer-frien... |
Fish Audio's credibility comes from its open-source lineage rather than marketing copy: the underlying Fish-Speech models on GitHub have over 21,000 stars, and the S1 model topped the TTS-Arena2 leaderboard while S2 Pro... |
Rime remains a strong pick for real-time, English-first voice agents, and Arcana v3 (Feb 2026) pushed language coverage to ten — adding Hindi, Arabic, Hebrew, and Tamil alongside the original six, with mid-sentence code-... |
Smallest.ai's pitch is refreshingly narrow: instead of one more general LLM, it ships small, fast models tuned for real-time voice — Lightning TTS clocks sub-100ms latency and Pulse STT covers 38 languages, both billed p... |
| Full review → | Full review → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.