Cartesia AI
Ultra-low latency
Natural voice AI
Developer-first
Enterprise-ready
Multilingual support
Voice agent platform
Voice AI that laughs, emotes, and pulls you into the conversation.
Last updated: May 30, 2026
FREEMIUM
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Voice AI that laughs, emotes, and pulls you into the conversation.
Cartesia AI is a real-time voice AI platform offering ultra-low latency text-to-speech (Sonic) and speech-to-text (Ink) models. It enables developers to build highly natural, emotional, and multilingual voice agents and applications. Best for enterprises and startups needing advanced conversational AI for customer service, sales, and localization. A free tier is available, with paid plans starting from $4/month billed yearly.
Cartesia AI provides ultra-low latency text-to-speech (Sonic) and speech-to-text (Ink) models for building highly natural and responsive voice agents. It offers emotional voice generation, instant voice cloning, and multilingual support across 40+ languages. Designed for developers and enterprises, Cartesia AI enables real-time conversational AI experiences with robust security and compliance.
Cartesia AI's Sonic-3 model offers breakthrough naturalness, including the ability to generate laughter and emotions, with ultra-low latency of 90ms, making conversations feel virtually human. It is built on State Space Models (SSMs) for efficiency and quality.
Use Cases
Best For
Complexity
Target Team Size
Target Skill Level
Base Models
Uses Models
Fair
Based on 9 data signals
Reflects publicly available data, not an independent audit
Discord, Email, Priority Email/Slack for Enterprise
Company Size
