Voice, Speech & Realtime AI

PolyAI raises $86M Series D at $750M valuation

Source: SiliconANGLE / Forbes · Dec 15, 2025

PolyAI, the voice-AI customer-service platform, has raised an $86 million Series D at a $750 million valuation — up 50% from its $500 million mark set in May 2024. The round was led by Georgian and Hedosophia, with a notably strategic investor list alongside them: Khosla Ventures, NVIDIA's own venture arm NVentures, British Business Bank, Citi Ventures, Zendesk Ventures, and Point72 Ventures. Total capital raised now exceeds $200 million, and PolyAI says its annual recurring revenue doubled to $40 million over 2025.

The investor list is worth a second look: NVentures and Zendesk Ventures both participating signals PolyAI is being treated as strategically relevant by both a compute/infrastructure giant and an incumbent customer-service software platform — the kind of dual interest that tends to precede either a deeper platform partnership or eventual acquisition interest. A 50% valuation step-up with ARR doubling in the same period is also a genuinely strong growth signal in a crowded voice-AI category, not just a round done on momentum.

Key Points

• $86M Series D values PolyAI at $750M, up 50% from its $500M mark in May 2024
• Led by Georgian and Hedosophia, with Khosla Ventures, NVIDIA's NVentures, British Business Bank, Citi Ventures, Zendesk Ventures, Point72 Ventures participating
• Total raised now over $200M; ARR doubled to $40M in 2025