Gradium passes $100M funding milestone

Gradium said on July 8 that it had crossed $100 million in total funding, extending its seed round seven months after launch and adding NVIDIA as a new investor. The Paris- and San Francisco-based startup said the new money will support AI research, product development, international expansion and a new Bay Area office. The company sells real-time voice infrastructure — speech-to-text, text-to-speech and voice cloning — through a developer API. The announcement places Gradium among a cluster of voice AI companies drawing large checks as investors continue to back infrastructure tied to live, low-latency applications. ### Why does the $100 million figure matter here? Gradium said the milestone came just seven months after its launch in December 2025, when it disclosed a $70 million seed round. That earlier round was led by FirstMark Capital and Eurazeo, with participation from DST Global Partners, Eric Schmidt, Xavier Niel, Rodolphe Saadé, Korelya Capital and Amplify Partners, according to the company’s launch materials. (gradium.ai) NVIDIA joined through what Gradium described as an extension of its seed financing. The company did not disclose the exact size of NVIDIA’s investment in its July 8 post, but external coverage pegged the new tranche at about $30 million, taking total funding above $100 million. ### What exactly does Gradium sell? Gradium’s website says it builds ultra-low-latency voice AI models for developers, including speech-to-text, text-to-speech and voice cloning through a single API. (gradium.ai) The company says its tools are designed for noisy environments, controllable latency and turn-taking in live conversations. The company’s launch post said its goal was to make “natural, real-time voice” a default interface between people and machines. (gradium.ai) Its press page and product materials position the business as infrastructure rather than a consumer app, aimed at developers and enterprises building voice agents and embedded products. ### Where did the company come from? Gradium said it was founded in September 2025 by researchers behind Kyutai, the Paris AI research lab known for work on real-time speech systems. (gradium.ai) The company said it was created to bring that research into production systems for commercial use. The founding story matters because voice infrastructure has become more crowded as model builders and application companies race to add spoken interfaces. (gradium.ai) Gradium’s pitch to investors and customers is that it can offer production-grade, real-time performance rooted in research on full-duplex speech systems. That framing comes from the company’s own launch and funding materials. ### Why add San Francisco now? (gradium.ai) Gradium said the new office in the San Francisco Bay Area will place it closer to developers and companies building AI agents. In its funding announcement, the company said the move would strengthen its position “at the heart of the world’s leading AI ecosystem.” The Bay Area expansion also gives the company a second operating base alongside Paris. Gradium’s July 8 announcement was datelined from both Paris and San Francisco, signaling that the U.S. market is part of its next phase after the seed extension. (gradium.ai) ### How does this fit into the broader voice AI market? The Next Web grouped Gradium this week with other AI and deep-tech funding rounds it said were worth watching, including infrastructure and compute-heavy bets. (gradium.ai) Separate recent coverage has also tracked large financings in voice AI, including ElevenLabs and Deepgram, underscoring continued investor interest in the category. Gradium said its next steps are to spend the new capital on research, product work, international expansion and the San Francisco office. NVIDIA, FirstMark Capital and Eurazeo are now among the named investors on its cap table as the company scales from its December 2025 launch. (gradium.ai) (thenextweb.com)