Coval announced it raised $28 million in Series A funding to expand its evaluation platform for voice AI. The round was led by Norwest, with participation from Base10 Partners, Twilio Ventures, and Y Combinator. The latest financing brings Coval’s total capital raised to $31 million since its launch in 2024.
Coval provides a simulation, observability, and labeling platform for AI voice and chat agents. The company helps enterprises test, monitor, and improve autonomous voice and chat agents so they can deploy the systems more reliably and at scale.
The company said the new funding will help address the reliability and compliance challenges enterprises face as they deploy autonomous voice agents. Coval plans to expand its sales and solutions engineering teams while advancing product capabilities such as deeper simulation, new integrations, and enhanced human review and monitoring features.
Coval runs tens of millions of evaluations and is trusted by companies including Zoom, Deepgram, and other Fortune 500 enterprises. The platform is used to support AI voice deployments across customer service, sales, financial services, healthcare, and other use cases.
Coval said enterprises are adopting voice AI quickly, but many still rely on manual quality assurance processes that do not scale under real-world complexity. The company’s platform provides testing and monitoring infrastructure that spans the full voice agent lifecycle, including pre-deployment simulation, live production monitoring, human review, and structured evaluation.
The platform is purpose-built for voice, audio processing, quality analysis, telephony latency, transcription error analysis, and agent workflow evaluation. Coval’s simulation-first approach is rooted in founder and CEO Brooke Hopkins’ experience building evaluation systems for autonomous technologies at Waymo.
Coval said companies use its platform to run probabilistic evaluations across millions of voice interactions. The company said customers rely on Coval to reduce manual QA processes by up to 30 times and increase voice agent deployment times by up to 10 times.
Founded in 2024 and based in San Francisco, Coval is a Y Combinator graduate. The company is trusted by more than 60 organizations to help ensure voice agents work as expected before and after deployment.
KEY QUOTES:
“Every company is going to have a voice agent just like they have a mobile app or a web app. But today, most enterprises don’t have the infrastructure to deploy these systems with confidence. Coval gives teams the ability to simulate, monitor and continuously improve voice agents, so they can move from experimentation to reliable production at scale.”
Brooke Hopkins, Founder and CEO of Coval
“Voice is going to be the number one interface for how humans interact with AI, and that shift creates an entirely new infrastructure layer for enterprises. With her deep experience building evaluation systems for autonomous technologies at Waymo, Brooke is uniquely positioned to lead Coval in defining how companies deploy and scale voice agents reliably. She helped prove self-driving cars could work, and now she’s tackling voice AI.”
Scott Beechuk, Partner at Norwest
“Twilio’s open, flexible, and model-agnostic infrastructure for the agentic era is driving the shift toward human-like voice AI agent experiences becoming the norm in customer engagement. Trust is critical to scaling these experiences, and our investment in Coval reflects our conviction that comprehensive evaluation and testing tools, combined with a strong observability and reliability layer, are foundational to maintaining momentum in today’s voice AI renaissance.”
Andy O’Dower, VP, Field CTO at Twilio
“Reliability and observability are a top priority for us at Zoom as voice AI moves into customer-facing production environments. Coval gives Zoom’s customers the ability to evaluate conversations systematically at scale, identify edge cases before they impact users, and move significantly faster with confidence.”
Ram Rajagopalan, Head of Product – CX AI at Zoom
“Voice agents introduce a new level of complexity compared to traditional software testing. Brooke has built Coval into a core part of the modern enterprise’s evaluation stack by improving reliability before scaled deployment. For any serious enterprise deployment, this is no longer a nice-to-have. At Deepgram, we power the voice AI infrastructure teams build on, but thanks to our partnership with Coval, enterprises can rest assured it’s working properly.”
Anoop Dawar, COO at Deepgram
