Coval has raised $28m to test AI voice agents before they reach real callers. Its founder built the same kind of safety checks for Waymo’s self-driving cars, and thinks voice needs them just as badly.
An AI voice agent can sound flawless in a demo and fall apart on a real call. It trips over accents, talks over background noise and freezes when a caller goes off script. Coval wants to catch those failures before a customer ever hears them. Investors are betting it can.
The San Francisco startup has raised $28m in a Series A round led by Norwest. Base10 Partners, Twilio Ventures and Y Combinator also joined. The deal brings Coval’s total funding to $31m since it launched in 2024. The company is a Y Combinator graduate.
The pitch is simple. As more firms put voice agents in front of customers, they need a way to prove the agents actually work. Coval sells that proof.
From self-driving cars to phone calls
