PolyAI

AI · London, GB

AI voice agents for enterprise call centers that handle complex conversations end-to-end.

Founders

Nikola Mrksic (Serbia · ♂) — After a Cambridge PhD under dialogue-systems pioneer Steve Young and building conversational AI at VocalIQ and Apple, he co-founded PolyAI to make enterprise voice assistants sound genuinely human.
Tsung-Hsien Wen (Taiwan · ♂) — A Cambridge dialogue-systems PhD who worked at Google, he co-founded PolyAI as CTO to commercialize the spoken-language generation research he and his co-founders pioneered.
Pei-Hao Su (Taiwan · ♂) — He met his co-founders during Cambridge PhDs in spoken dialogue systems and, after research at Facebook, co-founded PolyAI to apply that work to real customer-service voice assistants.

Shares the most investors with (number = shared investors):

Date	Round	Amount
Dec 2025	Series D Plus London-based PolyAI raised an $86 million Series D co-led by Georgian, Hedosophia and Khosla Ventures for its enterprise voice AI agents.	$86M

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