Cartesia

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Cartesia builds the models and infrastructure behind real-time voice agents. Its core architecture is built on State Space Models (SSMs) — a departure from standard transformer approaches designed specifically for low latency, long-context reasoning, and efficiency at scale, alongside research contributions like Mamba and H-Nets.

Its models power Line, Cartesia's platform for building and shipping voice agents, and are deployed across finance, healthcare, customer support, and other latency-sensitive use cases where response time is critical.