University of Cambridge spinout PolyAI has raised £64 million in a Series D round of funding to scale its AI agents.
The firm, now headquartered in New York, counts more than 100 enterprises as customers today, with over 2,000 live deployments across 45 languages and more than 25 countries.
The round was co-led by Georgian, Hedosophia, and Khosla Ventures. Additional investors include NVentures (NVIDIA’s venture capital arm), British Business Bank, Citi Ventures, Squarepoint Ventures, Sands Capital, Zendesk Ventures and Point72 Ventures.
PolyAI has now surpassed $200m in total funding to power helpful, human-like conversations that transform how enterprises speak with their customers.
It says its agentic AI now does the work of 1,000+ full-time employees at multiple enterprises. Its customers span financial services, healthcare, hospitality, insurance, energy, and retail — including household names such as Marriott, Caesars Entertainment, PG&E, UniCredit and Foot Locker.
“PolyAI started with a simple idea: enterprises should sound human,” said Nikola Mrkšić, CEO and co-founder. “We turned that idea into reality, and it led to something far greater: the emergence of the agentic enterprise.
“This is a living, breathing system that understands what your customers, employees, and AI agents are doing in real time — and helps them all succeed together. Like seeing a single drop of water and fixing a leak before it bursts, the agentic enterprise can detect and respond to problems and opportunities before human agents even know they exist.
“We’re building this future with the world’s leading enterprises, where our AI helps millions of customers every day.”
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Emily Walsh, lead investor at Georgian and a returning investor through three consecutive rounds, added: “For the world’s largest brands, customer service is no longer just a cost center, it’s a massive opportunity for value creation.
“PolyAI’s ability to deploy lifelike voice agents at enterprise scale unlocks significant savings and revenue. We believe that PolyAI is building the category-defining platform for customer service in the AI era, and we’re excited to co-lead this round.”