Paris-based AI voice startup Gradium raises $100M seed round, backed by Nvidia

Gradium, a Paris-based startup specializing in voice AI models, has reopened its seed round to new investors, including Nvidia, and has now raised a total of $100 million for the round, the company announced Thursday. The significant capital injection signals strong investor confidence in the company’s ultra-low-latency voice technology and its ambition to compete in the increasingly crowded AI voice market.

From Paris to the Bay Area

Gradium plans to use the fresh funding to establish an office in the San Francisco Bay Area, a move the company says will help it compete for top AI talent. “Strengthening its position at the heart of the world’s leading AI ecosystem,” as Gradium put it, is a strategic acknowledgment of the benefits of being close to major AI players like Anthropic, Google, Meta, and OpenAI. Paris remains a major European hub for AI, making this expansion a notable development in the transatlantic AI talent race.

Background and Founding Team

The startup originally launched out of stealth in December with $70 million from an impressive roster of investors, including FirstMark Capital, Eurazeo, DST Global Partners, former Google CEO Eric Schmidt, and French telecom billionaire Xavier Niel. Gradium was spun out of the French AI lab Kyutai, which is also backed by Niel. Both Kyutai and Gradium were co-founded by Neil Zeghidour, a researcher who previously worked at Google Brain, DeepMind, and Facebook, giving the venture deep technical credibility from the outset.

Technology and Competitive Landscape

Gradium is developing audio models designed to deliver voice at scale with ultra-low latency. The technology aims to eliminate the awkward pauses that often characterize AI agent conversations, enabling more natural, real-time interactions. The company faces stiff competition from other voice AI startups, such as ElevenLabs, which was valued at $11 billion in February, and major model makers like Google with its Gemini platform. Despite this, Gradium appears to be gaining traction. Since its December launch, the company has secured notable customers, including French auto manufacturer Renault, indicating early market validation.

Why This Matters

The $100 million seed round—one of the largest ever for a European AI startup—underscores the intense investor interest in voice AI as a key interface for next-generation applications. Gradium’s expansion to the Bay Area also highlights the ongoing gravitational pull of Silicon Valley for cutting-edge AI companies, even as other tech hubs like Paris continue to flourish. For readers, this story illustrates the accelerating race to build voice interfaces that feel truly human, and the significant capital required to compete at the highest level.

Conclusion

Gradium’s ability to attract backing from Nvidia and a host of high-profile investors, combined with its early customer wins, positions it as a serious contender in the voice AI space. The company’s next challenge will be scaling its technology and talent base to compete with well-funded rivals in both Europe and the United States.

FAQs

Q1: What is Gradium?
Gradium is a Paris-based startup that develops AI voice models with ultra-low latency, designed to enable real-time, natural-sounding voice interactions for applications like AI agents and customer service.

Q2: How much funding has Gradium raised?
Gradium has raised a total of $100 million in its seed round, which was initially $70 million and later reopened to include new investors like Nvidia.

Q3: Who are Gradium’s main competitors?
Gradium competes with other voice AI startups such as ElevenLabs, as well as major tech companies like Google with its Gemini platform, which also offer advanced voice capabilities.