Where does Kieran O'Neill work?

Kieran O'Neill is Founder/CEO of Thread.

Where did Kieran O'Neill go to school?

Kieran O'Neill studied at Y Combinator (Making something people want. S12.); University of Bath (School of Management).

Kieran O'Neill

Founder

Founder/CEO at Thread

London, England, United Kingdom

FoundedThread · YC

30 Under 30 2016 · Consumer Technology

About

Kieran O'Neill is a founder who has built and exited three companies. At 15 he created a video sharing site that reached 10 million monthly active users before exiting to a NASDAQ-listed company at 19, later left university to start a gaming social app that also exited, and co-founded Thread, an AI fashion stylist that took part in Y Combinator S12, raised $40 million from investors including Balderton and Demis Hassabis, grew to 3 million customers, and was acquired by Marks & Spencer. He has been named in the Financial Times Top 10 Under 30, Drapers 30 Under 30, and Forbes 30 Under 30.

Founder/CEO at Thread YC S12

Intro paths

Kieran went through Y Combinator (Summer 2012) — any YC alum in your network can reach them through the YC community.

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In turn, Kieran can intro founders to Thread's investors below.

Thread's investors · 4

Balderton CapitalLondon · $5M – $50M checks · since 2020 BeringeaLondon · $3M – $10M checks Portage VenturesMontreal · since 2025 Y CombinatorSan Francisco · $500K checks · since 2012

Co-founders at Thread

Ben PhillipsFounder/CTO

Experience

[building]CEO & Co-Foundercurrent2026 — present
Marks and SpencerSenior Head of Product, Personalisation / Consumer AI2022 — 2026
ThreadCEO & Co-Founder (Acquired by M&S)2012 — 2022
PlayfireCEO & Co-Founder (Acquired)2007 — 2012
PSUCo-Founder (Acquired)2003 — 2010
Holy LemonFounder (Acquired)2003 — 2007

Education

Y CombinatorMaking something people want. S12.2012
University of BathSchool of Management2005 — 2007

Skills & more

Start-ups78SEO25Social Media23Online Advertising22Social Networking9Affiliate Marketing3Entrepreneurship43Business Strategy9Strategic Partnerships8Lead Generation2Public SpeakingProduct Development6

+3 more

Video GamesBusiness DevelopmentProduct Management

Languages Spanish

From Kieran's professional profile.

Frequently asked questions

Who is Kieran O'Neill?: Kieran O'Neill is a founder who has built and exited three companies. At 15 he created a video sharing site that reached 10 million monthly active users before exiting to a NASDAQ-listed company at 19, later left university to start a gaming social app that also exited, and co-founded Thread, an AI fashion stylist that took part in Y Combinator S12, raised $40 million from investors including Balderton and Demis Hassabis, grew to 3 million customers, and was acquired by Marks & Spencer. He has been named in the Financial Times Top 10 Under 30, Drapers 30 Under 30, and Forbes 30 Under 30.
Where does Kieran O'Neill work?: Kieran O'Neill is Founder/CEO of Thread.
What companies did Kieran O'Neill found?: Kieran O'Neill founded Thread.
Where did Kieran O'Neill go to school?: Kieran O'Neill studied at Y Combinator (Making something people want. S12.); University of Bath (School of Management).