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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.
CEO at ThreadYC S12
Intro paths
Kieran went through Y Combinator (Summer 2012) — any YC alum in your network can reach them through the YC community.
In turn, Kieran can intro founders to Thread's investors below.
Thread's investors · 11
Co-founders at Thread

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 CEO of Thread.
- What companies did Kieran O'Neill found?
- Kieran O'Neill founded Thread.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
University of Bath mafia82
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Thread's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights
















