# Phelim Bradley

> Phelim Bradley is the Irish co-founder and CEO of Prolific, a platform connecting researchers and AI developers with verified, paid participants. He built its first platform in 2014 during his Oxford doctorate, led product strategy as CTO and became CEO in 2021. His public work centres on data quality, representative participation and human judgment in AI training and evaluation.

- **Role:** Co-founder and CEO at Prolific
- **Organizations:** Prolific, Pioneer Fund
- **Nationality:** Irish
- **Education:** BSc in Physics, University College Cork, MPhil in Computational Biology, University of Cambridge, DPhil; computational biology research, University of Oxford, Startup accelerator, Summer 2019 batch, Y Combinator
- **Known for:** Built the first Prolific platform in 2014., Led Prolific product strategy as CTO before becoming CEO in 2021., Co-founded a company selected for Y Combinator Summer 2019 and Tech Nation Future Fifty 2026.

## Career timeline

- **2014** — Co-founded Prolific with Ekaterina (Katia) Damer and built the first platform while pursuing his Oxford doctorate.
- **2014–2021** — Served as CTO and led Prolific’s product strategy before becoming CEO in 2021.
- **2019** — Prolific participated in Y Combinator’s summer batch.
- **2021** — Became CEO of Prolific.
- **2023** — Led Prolific during its £25 million Series A, co-led by Partech and Oxford Science Enterprises.
- **2024** — Spoke on a data-for-AI panel at the GenAI Summit in the Bay Area.
- **2026** — Published an open letter on AI agents in online research; later marked Prolific’s selection for Tech Nation’s Future Fifty.

## Achievements

- Built the first Prolific platform in 2014.
- Led Prolific product strategy as CTO before becoming CEO in 2021.
- Co-founded a company selected for Y Combinator Summer 2019 and Tech Nation Future Fifty 2026.
- University College Cork Science, Engineering and Food Science Graduate of the Year, awarded April 2013 according to his LinkedIn profile.

## Latest updates

- **2026-09** — On September 24 Bradley wrote about Prolific’s selection for Tech Nation’s 2026 Future Fifty cohort, reporting a participant network of over 300,000, including over 90,000 with specialist qualifications.
- **2026-05** — On May 19 he published an open letter arguing for evidence-led discussion of AI agents in online research and continued investment in verification and respondent engagement.
- **2026-03** — Appeared on Eye on A.I. with Craig Smith to discuss human judgment, participant verification and model evaluation.

## Links

- Website: http://phel.im
- LinkedIn: https://www.linkedin.com/in/phelim-bradley-84300826/
- Twitter/X: https://x.com/Phelimb
- GitHub: https://github.com/phelimb

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Profile page: https://yespress.io/phelim-bradley
Published by YesPress — https://yespress.io
Last updated: 2026-10-23