Cartesia

Overview

Cartesia is a real-time voice generation platform built on state-space models for very low-latency speech synthesis. Its Sonic models target conversational voice agents that need fast, natural responses. Access is through a developer API with usage-based pricing and free credits.

Key features

• Very low-latency text-to-speech
• State-space (SSM) model architecture
• Voice cloning and multilingual voices
• Streaming API for conversational agents

Use cases

• Real-time voice agents and assistants
• Interactive voice applications
• Low-latency narration and dubbing

Pricing

Access is via a usage-based developer API with free starter credits and paid tiers for scale.

Frequently asked questions

What is Cartesia known for?

Cartesia is known for very low-latency speech synthesis built on state-space models, aimed at real-time voice agents.

How do developers use Cartesia?

Developers access Cartesia's Sonic voice models through a streaming API.

Is Cartesia free?

Cartesia offers free starter credits; production usage is priced by usage.

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Sources

• Official website ↗
• Documentation ↗

This record was last reviewed on 2026-07-29.

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