Cartesia

Cartesia provides an AI-powered voice synthesis platform centered on real-time, low-latency audio generation. Its core offering, Sonic, is a text-to-speech model designed for speed and naturalness, enabling developers to integrate high-quality voice output into products such as conversational AI agents, accessibility tools, and interactive applications. The platform supports voice cloning, allowing users to create custom voices from audio samples, and offers multilingual capabilities across a range of languages. Cartesia exposes its models through an API, making it accessible for programmatic integration into third-party applications and workflows. The service is structured around usage-based and subscription pricing tiers, targeting individual developers through to enterprise teams. Key differentiators emphasized on the official site include low inference latency suitable for real-time dialogue, a streaming audio API, and a library of pre-built voices. Cartesia positions itself primarily as an infrastructure-layer solution for teams building voice AI products rather than as an end-user consumer application.