PolyAI

PolyAI builds enterprise voice assistants that handle customer calls in natural, human-like conversation. Founded in London in 2017 by Nikola Mrkšić (CEO), Pei-Hao Su, and Tsung-Hsien Wen — researchers from the University of Cambridge's Machine Intelligence Lab, with Mrkšić having been the first engineer at VocalIQ before its acquisition by Apple for Siri — PolyAI focuses on voice-first conversational AI for contact centres.

Its assistants resolve calls for reservations, billing, account servicing, and more across 45 languages, with more than 100 enterprise customers and 2,000-plus live deployments; a Forrester study found customers achieved a 391 percent ROI with average savings of $10.3 million. In December 2025 PolyAI raised an $86 million Series D co-led by Georgian, Hedosophia, and Khosla Ventures, with NVIDIA's NVentures, Citi Ventures, and Zendesk Ventures, pushing total funding past $200 million at a $750 million valuation.

Choose PolyAI when lifelike enterprise voice and multilingual call automation are the core need.