#1-ranked for realtime voice. Models and agents built on frontier research.

Voice agents that answer and make calls, and the speech models behind them, in one API fast enough for live conversation.

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Warm and unhurried

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

Speech models and the voice agents built on them, running on State Space Models for low latency at scale.

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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.