Paris-Based Voice AI Startup Gradium Raises $100M Seed With Nvidia Backing

Gradium, a Paris-based voice AI startup, closed a $100 million seed round — one of the largest early-stage checks in European AI to date. Nvidia participated as a strategic backer, and the company plans to open a San Francisco Bay Area office to compete for talent.

What Gradium builds

Details remain thin, but the company is understood to be targeting the enterprise voice-agent category — competing with players like Sesame, Retell, and Vapi. The pitch differentiator is model-plus-runtime as a single integrated product, rather than a wrapper around a general-purpose speech API.

Why nine figures at seed

Voice-specific foundation models require training runs measured in millions of dollars each. To ship a product, Gradium needs to fund the model, the runtime, the app layer, AND compete for salaries against Bay Area incumbents. $100M is not lavish at that scale — it's the floor.

The European angle

Paris continues to punch above its weight in AI (Mistral, H, ElevenLabs). Gradium's raise adds to the pattern of frontier AI capital increasingly flowing outside the US.

Source: TechCrunch