Cartesia
Ultra-fast voice AI with sub-100ms latency for real-time text-to-speech and speech-to-text.
About Cartesia
Cartesia builds ultra-fast voice AI models for real-time applications. Its flagship Sonic-3 text-to-speech model achieves 90ms time-to-first-audio, supports 15+ languages, and includes expressive features like laughter and emotional inflections. Also offers Ink-Whisper for speech-to-text.
Key Features
💰 Pricing
Free tier with $1 prepaid balance. Startup at $49/mo, Scale at $299/mo. Usage-based at $0.06/min for voice agents.
$1 prepaid agent balance, 2 concurrent sessions
Higher concurrency, production-ready
30+ concurrent sessions, priority support
Custom deployment and SLAs
Frequently Asked Questions
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📊 Comparison vs Alternatives
| Feature | ||||
|---|---|---|---|---|
| Pricing | Freemium | Freemium | Freemium | Freemium |
| Rating | ⭐ 4.3 | ⭐ 4.8 | ⭐ 4.8 | ⭐ 4.6 |
| Free Tier | ✅ | ✅ | ✅ | ✅ |
| Popularity | 52% | 100% | 94% | 92% |
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