Cartesia

Cartesia is an Audio & Music tool that provides a real-time text-to-speech API with AI laughter and emotion. It generates natural, expressive voices in over 40 languages for AI agents and interactive applications.

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At a glance

Pricing

Freemium · Paid

Free tier

Yes

API

Yes

Skill level

Technical

About

What is Cartesia?

Cartesia offers Sonic-3, a streaming Text-to-Speech (TTS) API designed for real-time applications and AI agents. This API generates highly natural and expressive voices, capable of conveying emotions like excitement and sadness, and even includes AI-generated laughter. It supports over 40 languages, including 9 Indian languages, ensuring global reach with native-sounding voices. Sonic-3 is built for ultra-low latency, making conversations feel seamless and responsive, crucial for interactive AI experiences. The platform also features instant and professional voice cloning, allowing users to create custom voices quickly. With developer-first APIs and SDKs, Cartesia is suitable for rapid prototyping and seamless integration into various products and industries, including healthcare, customer support, and gaming.

Best used for

Ideal for content creators who need to integrate highly natural and emotional voice AI into their applications, develop interactive AI agents, and generate expressive voiceovers in multiple languages. Especially valuable for scenarios requiring real-time, low-latency audio responses and custom voice branding.

Common actions

generate expressive speech

create AI voices

integrate real-time TTS

clone voices

Capabilities

Key features

Real-time streaming TTS
AI laughter and emotion
40+ languages
Instant voice cloning
Ultra-low latency
API and SDK access

Target Audience

content creator

Integrations

Not yet documented

Pricing & Plans

Freemium · Paid

Not publicly disclosed. Check cartesia.ai for current pricing.

FAQs

What is the latency of Cartesia's Sonic-3 TTS API?

Cartesia's Sonic-3 TTS API is designed for ultra-low latency, with model latency often less than 100 ms. This ensures real-time responses, making conversations feel seamless and natural for interactive AI agents and applications.

Can Cartesia's Sonic-3 generate voices with emotions and laughter?

Yes, Sonic-3 is capable of generating natural, expressive voices that include AI laughter and various emotions like excitement and sadness. This feature helps create more engaging and human-like interactions for AI agents.

How many languages does Cartesia's Sonic-3 support?

Cartesia's Sonic-3 supports over 40 languages, covering 95% of the world's population. This includes native-sounding voices for various regions, such as 9 Indian languages, making it suitable for global applications.

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Coding & Development › Backend & APIs AI Agents & Automation › Voice Agents

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