Observed Signal · Jul 10, 2026 · Funding · Source: CMSWire · Impact: 3/5 · Sentiment: Positive
Gradium Raises $100M Seed, Adds NVIDIA as Investor
Paris-based voice AI startup Gradium extended its seed financing to $100 million, seven months after launch. The round included new investors such as NVIDIA and will fund a new San Francisco Bay Area office. Founded in September 2025 by researchers from Kyutai, Gradium focuses on production-grade voice AI infrastructure, offering streaming TTS/STT APIs, voice cloning, and orchestration tools. The company claims it generated revenue within weeks of launch, though figures were undisclosed. The funding will accelerate AI research, product development, and international expansion. Key technical features include real-time TTS, semantic turn detection, and an on-device TTS model called Phonon. The conversational AI market is projected to grow from $17.7 billion to nearly $78.9 billion by 2033.
Significant $100M seed round for a voice AI startup with NVIDIA participation, indicating strong investment and growth in conversational AI infrastructure.
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Key Takeaways & Evidence Grounding
- Gradium extended its seed round to $100 million.
- NVIDIA joined as a new investor in the round.
- The company will open a San Francisco Bay Area office.
- Gradium was founded in September 2025 by researchers from Kyutai.
- The company generated revenue within weeks of launch (amount undisclosed).
Connected Companies & Entities
5 Entities mapped“The extension added new investors including NVIDIA....”
“Other competitors in the field include ElevenLabs, delivering low-latency voice capabilities through its ElevenAPI platform....”
“Mistra AI's Voxtral Transcribe 2 suite, which targets sub-200ms streaming speech-to-text across 13 languages....”
“Another contender in the space, Deepgram, illustrates how full-stack voice infrastructure is taking shape....”
“as VKTR's coverage of OpenAI's GPT-Live launch noted....”
Ontology Mapping & Concepts
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