Scott Stephenson didn’t just build one of the world’s most advanced underground dark matter detectors, he’s now redefining how machines understand human speech. As CEO and Co-Founder of Deepgram, Stephenson leads a company powering over voice-driven applications across global brands, offering speech-to-text and text-to-speech APIs that support more than 30 languages. Under his leadership, Deepgram has raised over $86 million from backers like NVIDIA and Y Combinator, and the company continues to grow its footprint in AI-powered voice services.
Stephenson’s career didn’t begin in AI. With a PhD in physics from the University of Michigan, his early work focused on detecting dark matter deep underground using liquid xenon detectors—high-precision research that required massive amounts of data processing. His postdoctoral work at UC Davis contributed to some of the most sensitive dark matter experiments. But it was the technical overlap between analyzing subatomic particle collisions and parsing audio waveforms that sparked the shift. Building on this idea, he co-founded Deepgram to bring deep learning to audio, then a new concept. Since then, he has led the company’s growth in the voice AI field.
At the heart of Stephenson’s work is a deep belief in foundational discovery. He sees his team at Deepgram not just as engineers or product builders but as researchers uncovering the building blocks of machine intelligence. While he misses physics, he likens his current work to decoding “the fundamental laws of intelligence.” His approach to leadership is hands-on, data-informed, and rooted in the idea that every person—and every system—can improve through feedback. Whether it's developing active learning techniques for synthetic audio data or encouraging customers to help refine models through user feedback, Stephenson stays focused on practical, scalable solutions. What drives him is not just technology but transformation—helping people and businesses adapt to an AI-focused world where voice is no longer a luxury feature but the foundation of real-time interaction.