Vapi, a company focused on voice AI, has raised $20M in funding to support its vision of a "voice-first future" where technology adapts back to humans. Voice AI has reached a point where its outputs can be as natural as human conversation, and the company aims to use it to put humans at the forefront of technology. Vapi's platform is designed for consumer-facing companies that rely on voice interactions, offering complete control over models, deterministic conversation flows, scalable infrastructure, and simple integration with existing telephony systems. With this funding, Vapi plans to tackle hard problems such as real-time agentic reasoning and build a team of experts to power the next era of human-machine communication. The company is already handling millions of calls per month for customers worldwide and has assembled an extraordinary team of ex-YC CTOs, founders, and high-energy individuals.