Cartesia

Speech and voice-agent platform with real-time transcription, voice synthesis, and managed agents.

Overview

Cartesia provides an API and managed platform for interactive voice applications. Its products include Ink for streaming speech-to-text, Sonic for text-to-speech, and Managed Agents for building voice agents. Cartesia supports cloud, regional, on-device, and on-premises deployment options for real-time conversations.

Key features

Streaming speech-to-text
Text-to-speech synthesis
Managed voice agents
Real-time conversation APIs
Cloud and regional endpoints
On-device and on-premises options
Voice-agent customization

Use cases

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Last updated 2026-09-16