Gradium, SPHÈRE II SPV, voicetech, Paris, France


Gradium

Dec 2, 2025

𝐆𝐫𝐚𝐝𝐢𝐮𝐦 𝐢𝐬 𝐨𝐮𝐭 𝐨𝐟 𝐬𝐭𝐞𝐚𝐥𝐭𝐡 𝐭𝐨 𝐬𝐨𝐥𝐯𝐞 𝐯𝐨𝐢𝐜𝐞.

We raised $70M, and after only 3 months we’re releasing our transcription and synthesis products to power the next generation of voice agents.

Today, we’re already serving our first customers. We’re in prod powering market research, appointment booking, digital advertisement, gaming NPCs and more. We bring natural, cost-effective, and fast voice synthesis and understanding, starting with five languages: English, French, Spanish, Portuguese, and German.

Gradium is founded by a team that shaped the modern voice research landscape: Neil Zeghidour, Olivier Teboul, Laurent Mazare, and Alexandre Défossez. The founding team is completed by Constance Grisoni (Deperrois) and Eugene Kharitonov.

We are thrilled to be accompanied by FirstMark and Eurazeo, who led this round, along with DST Global Partners, Eric Schmidt, Xavier Niel (iliad), Rodolphe SAADE (CMA CGM), Korelya Capital (Fleur Pellerin), Amplify Partners, Liquid 2 Ventures, Drysdale Ventures and angels including Yann LeCun, Olivier Pomel, Ilkka Paananen (Illusian Founder Office) ,Thomas Wolf, Guillermo Rauch and Mehdi Ghissassi (Tiny Supercomputer Investment Company).

𝐋𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐧𝐞𝐱𝐭 𝐜𝐡𝐚𝐥𝐥𝐞𝐧𝐠𝐞? We are growing the team, offering unique opportunities in Paris across product, sales, research, and engineering positions.
 
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