Voice AI Crosses From Demo to Infrastructure as Gradium Extends Seed to $100M With NVIDIA Aboard

A voice startup's extended seed round and its focus on turn-taking, latency, and hard-case benchmarks signal that voice is being rebuilt as agent runtime, not a feature.

Voice AI is quietly graduating from a demo trick into serious agent infrastructure, and Gradium's latest raise is the clearest marker yet. The company extended its seed funding to $100 million and welcomed NVIDIA as a new investor, as detailed by @dball1126. A hundred-million-dollar seed round is itself a statement about how much capital the voice layer now commands, but the more telling signal is where the company is spending its engineering attention.

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