The rapidly expanding voice AI sector has reached a notable milestone with Deepgram, a leading model provider, announcing a major Series C funding round. The company raised $130 million, led by AVP, at a valuation of $1.3 billion. This investment reflects the growing demand for voice AI solutions across industries such as sales, marketing, customer support, and consumer-facing applications.

The round attracted strong participation from both existing and new investors. Returning backers included Alkeon, In-Q-Tel, Madrona, Tiger, Wing, and Y Combinator, while new strategic investors such as Alumni Ventures, Columbia University, Princeville Capital, Twilio, and SAP joined the raise. With this latest funding, Deepgram’s total capital raised now exceeds $215 million, cementing its position as a key player in the voice AI ecosystem.

Deepgram’s raise aligns with a broader surge of investment in voice AI over the past year. High-profile rounds such as Sesame’s $250 million Series B, ElevenLabs’ $180 million Series C, and Gradium’s $70 million seed round highlight a rapidly maturing and increasingly attractive market for voice-driven AI technologies.

Elizabeth de Saint-Aignan, a partner at AVP, explained that voice AI repeatedly surfaced in enterprise AI strategy discussions throughout 2024, particularly in areas like contact centers and sales development. AVP found that much of the underlying technology powering these use cases was built on Deepgram’s models, underscoring the company’s central role in the sector. She noted that voice AI can meaningfully improve customer experiences while reducing operating costs, positioning Deepgram as a critical enabler of enterprise adoption.

Deepgram offers a broad suite of voice AI products, including text-to-speech and speech-to-text models, alongside APIs and platforms optimized for conversational speech recognition, interruption handling, and low-latency performance. Its technology is used by more than 1,300 organizations, with customers ranging from meeting notetaker Granola and voice agent startup Vapi to communications giant Twilio.

CEO Scott Stephenson emphasized that the company did not actively pursue fundraising, having achieved cash-flow positivity the previous year. Instead, the round was driven by accelerating market demand and the mainstream adoption of voice AI. According to Stephenson, the capital will allow Deepgram to invest earlier and more aggressively in growth, while partnering with investors who understand the technical depth of voice AI and support companies building on the platform.

Looking ahead, Deepgram plans to expand globally and strengthen multilingual support. A key focus area is voice AI in the restaurant industry, reinforced by its recent acquisition of OfOne, a Y Combinator-backed startup offering a voice-powered ordering system for quick-service restaurants with reported accuracy above 93%.

Although the restaurant sector presents challenges—as seen in Taco Bell’s withdrawal from a voice AI trial following a viral mishap—Stephenson remains optimistic. He believes conversational food ordering could become the first genuinely positive voice AI experience for hundreds of millions of Americans, signaling that the technology has matured beyond earlier frustrations.

Investor confidence in the sector remains strong. Alongside Deepgram’s acquisition of OfOne, companies like Presto have raised fresh funding to serve major restaurant brands. Market forecasts estimate the voice AI industry will grow at over 30 percent annually, reaching a $14–$20 billion valuation by 2030. If this trajectory holds, core model and API providers like Deepgram are well positioned to become multibillion-dollar companies at the foundation of next-generation voice-driven applications.