PolyAI

Voice AI agents for enterprise contact centers, handling phone-based customer support autonomously.

📍 United Kingdom 🇬🇧, London

Product overview

PolyAI is a voice AI platform based in London that builds AI agents to handle enterprise phone support. Founded in 2017 by machine learning researchers from the University of Cambridge, the company developed proprietary speech recognition (Owl), language models (Raven), and voice synthesis (Macaw) to create agents that hold natural, context-aware phone conversations. These agents authenticate callers, manage bookings, process payments, troubleshoot issues, and route complex cases to human staff. PolyAI's Agent Studio platform lets businesses design, deploy, and monitor voice agents across languages and markets. Pricing follows a per-minute model rather than per-seat licenses. The company has raised over $200M, including an $86M Series D in late 2025 backed by Georgian, Hedosophia, Khosla Ventures, and Nvidia's NVentures. PolyAI serves over 100 enterprise clients including FedEx, Marriott, Unicredit, and Caesars across 25+ countries. A Forrester study reported 391% ROI for PolyAI deployments. The company was ranked number one in the 2025 Deloitte UK Technology Fast 50 for AI companies. KEY FEATURES: - Proprietary voice AI stack with speech recognition, language model, and synthesis - End-to-end call handling including authentication, bookings, and payments - Agent Studio platform for building and monitoring voice agents - Per-minute pricing model with managed performance optimization - Multilingual voice agents deployed across 25+ countries