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    Cartesia Says This Is the Year of Voice AI

    While the foundations are technical, the end goal is deeply human, making AI voices as seamless and natural as possible.

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    Cartesia Says This Is the Year of Voice AI

    Today's AI models are slow, expensive, and lack the depth of human intelligence. Their high computational costs mean only the largest companies can afford to develop and deploy them. "The next generation of AI requires a phase shift in how we think about model architectures and machine learning," says Karan Goel, co-founder and CEO of Cartesia. For centuries, human voices have carried the weight of communication, from intimate conversations to speeches that shaped history. But as technology advances, the way we engage with voice itself is undergoing a transformation that companies like Cartesia are determined to push forward.

    Cartesia, a real-time AI-driven voice technology company, has secured $64 million in a Series A funding round led by Kleiner Perkins. The funding, also backed by Index Ventures, Lightspeed, A*Capital, Factory, Greycroft, Dell Technologies Capital, and Samsung Ventures, brings the startup’s total investment to $91 million. With over 10,000 customers already leveraging its technology, including Quora, Cresta, and Rasa, Cartesia is poised to shape the future of voice AI.

    — Cartesia (@cartesia_ai) March 11, 2025

    The Drive Behind Sonic 2.0

    Cartesia’s latest voice model, Sonic 2.0, which is designed to deliver ultra-realistic, low-latency speech, making it well-suited for applications in conversational AI, content production, and real-time communication. Built on a state space model (SSM) architecture, Sonic 2.0 has doubled in size compared to its predecessor while achieving higher speed and efficiency. It offers 90-millisecond latency for full models and an even faster 40 milliseconds for real-time applications performance metrics that surpass industry competitors.