#1-ranked realtime interaction models. Built on frontier AI research.

One API for speech generation, transcription, and production voice agents — fast enough for live conversation.

Voice agents for every industry

Financial services

Fraud detection

Real-time outbound verification calls on suspicious transactions, step-up authentication

Voice agents that improve customer experience, enhance security, and streamline operations across the financial ecosystem.

Financial services

Voice agents that improve customer experience, enhance security, and streamline operations across the financial ecosystem.

Join the teams making the switch to Cartesia

Ranked #1

in Speech Arena leaderboard & Speech to Text leaderboard by Artificial Analysis

The full stack for interactive intelligence

Built on State Space Models (SSMs), a new primitive for low latency, long-context reasoning, and greater efficiency at scale.

Try Cartesia

Ink.Speech-to-text

The fastest, most accurate streaming transcription model.

Sonic.Text-to-speech

The fastest, ultra-realistic voice synthesis model.

Voice agents as fast and accurate as the models powering them

Managed Agents.Build voice agents

The fastest, most customizable platform for building and shipping enterprise voice agents, powered by our models.

Pioneering AI research:Architectures that learn through real-world interaction

Our team has pioneered breakthrough AI architectures, including state space models (SSMs), Mamba & H-Nets. Our research manifests our mission — we architect AI that learns from and interacts with the world like humans do.

Our research

Deploy AI anywhere.Own it everywhere.

The same models and agents across cloud, on-premise, and on-device. Inference runs in-region — keeping you within your latency envelope, data residency obligations, and compliance frameworks.

Deploy via regional API endpoints across the globe — ensuring in-region processing, high availability, and the uptime your production systems demand.