# PolyAI

Conversational AI · Paddington · Series D

PolyAI builds human-like voice AI agents that handle customer service phone calls for large enterprises, resolving high-volume interactions in industries such as hospitality, travel, financial services, healthcare and retail. Founded in 2017 by Cambridge machine-learning researchers Nikola Mrksic, Pei-Hao Su and Tsung-Hsien Wen, it serves over 100 enterprise clients including Marriott, Caesars Entertainment, UniCredit and PG&E. Its voice agents are designed to sound natural and handle complex, multi-turn conversations. A $86M Series D in December 2025, co-led by Georgian, Hedosophia and Khosla Ventures, took total funding past $200M at a $750M valuation.

- Website: https://poly.ai
- Careers: https://poly.ai/careers/
- Sector: [Voice & Conversational AI](https://aistartupslist.co.uk/sector/voice-ai.md)

## Facts

- Funding stage: Series D
- Total raised: $200M
- Founded: 2017
- Headquarters: London, United Kingdom
- Team size: 201-500

## Notable investors

Khosla Ventures, Georgian, Hedosophia, NVIDIA (NVentures), Point72 Ventures, Amadeus Capital Partners

## Open UK & remote roles

- [Contract Recruiter (GTM and Engineering) | Rolling Monthly Contract](https://aistartupslist.co.uk/company/polyai/contract-recruiter-gtm-and-engineering-rolling-monthly-contract-7g4ea4.md) · United Kingdom, United States (posted 2026-09-02)
- [Flemish & Dutch Language Specialist (UK based Contract role)](https://aistartupslist.co.uk/company/polyai/flemish-and-dutch-language-specialist-uk-based-contract-wxjnai.md) · United Kingdom (posted 2026-07-15)
- [Head of Product Marketing (London, UK)](https://aistartupslist.co.uk/company/polyai/head-of-product-marketing-london-uk-18h4we.md) · United Kingdom (posted 2026-08-05)
- [Product Communications Lead](https://aistartupslist.co.uk/company/polyai/product-communications-lead-wvei80.md) · United States, United Kingdom (posted 2026-09-01)