Cartesia

Cartesia delivers a complete voice foundation for building real-time conversational applications at enterprise scale. The platform combines high-fidelity speech synthesis, accurate speech-to-text recognition, and a managed voice agent framework—each optimized for low-latency, production-grade reliability.

Highlights

• Sonic: instant, natural-sounding text-to-speech with voice cloning capabilities for personalized agent interactions
• Ink: streaming speech recognition tuned for conversational accuracy and sub-100ms latency
• Line: managed agent framework for building, deploying, and controlling voice applications via API
• Real-time optimization: designed for concurrent user handling and strict SLA requirements
• Enterprise flexibility: compliance features including data processing agreements and single sign-on

Cartesia targets engineering teams and enterprises that treat voice as a core interaction channel rather than an afterthought. The freemium pricing model starts with a free tier offering monthly credits; paid plans begin at $5 and scale through higher-volume tiers up to enterprise agreements with volume pricing and dedicated support.