Gradium
Gradium is a TTS / Voice Synthesis company founded in 2025 and based in Paris, France. It has raised $100M in total funding, most recently a Seed in 2026.
Gradium was founded in Paris in September 2025 by Neil Zeghidour, Laurent Mazaré, Olivier Teboul and Alexandre Défossez, members of the founding team of the nonprofit AI research lab Kyutai, and launched publicly on Dec. 2, 2025. It develops audio language models for real-time text-to-speech, speech-to-text, voice cloning, voice design and live speech translation in English, French, German, Spanish and Portuguese, and on Oct. 21, 2026 released Phonon, an open-weight text-to-speech model that runs on devices. Gradium sells API access through credit-based monthly plans that range from a free tier to enterprise contracts with dedicated inference and on-premises deployment. It raised a $70 million seed round led by FirstMark Capital and Eurazeo at launch, with DST Global, Eric Schmidt and Xavier Niel among the other investors, and on July 9, 2026 extended the seed to $100 million with NVIDIA joining. Gradium has offices in Paris and the San Francisco Bay Area.
Gradium sells the speech models that voice agents run on and competes with ElevenLabs for developers building real-time agents. Its text-to-speech has been available through LiveKit Inference since Sept. 9, 2026, it joined the Eden AI platform on Oct. 19, 2026, and its models run inside Yampa's customer-care platform under a partnership announced Oct. 26, 2026. Renault is a customer, and NVIDIA joined its seed round in July 2026 as Gradium opened a Bay Area office to compete for talent.
At a glance
Total raised
$100M
Headcount
—
Headquarters
Paris
FranceFounded
2025
Status
Private
Subsector
Where Gradium ranks
Top 25 Voice & Conversational Interfaces companies →Funding history
Total raised
$100M
Rounds tracked
1
Latest stage
Seed
| Date | Stage | Amount | Valuation | Lead investors |
|---|---|---|---|---|
| Jul 9, 2026 | Seed | $100M | — | FirstMark Capital, Eurazeo |
In the news
Gradium · last 30 days