Cartesia
NEW freemiumReal-time AI voice with 40 ms latency
About
Cartesia is the speed pick. Where ElevenLabs optimizes for narration quality, Cartesia optimizes for real-time conversation — 40 ms first-token latency means voice agents respond before users notice. Trade-off: less emotional nuance than ElevenLabs' Multilingual v2. Best when latency is the constraint (phone agents, live translation, game NPCs).
Key features
- 40 ms first-token latency
- Real-time streaming
- Voice cloning from 10 sec sample
- WebSocket + REST API
- Multilingual
Best for
Voice agents Live translation Game NPCs