Thomas Wolf
About Thomas Wolf
Thomas Wolf is a co-founder and Chief Science Officer of Hugging Face. Clément Delangue, Julien Chaumond and Wolf founded the company in 2016. It began as a chatbot app and moved to open-source machine learning tools. Its libraries include Transformers, Datasets, Diffusers and Accelerate. Wolf is the first named author of the 2019 Transformers library paper. He also initiated the BigScience research collaboration.
Before Hugging Face he studied at École Polytechnique and earned a PhD in statistical and quantum physics. He did research at Lawrence Berkeley National Laboratory and later took a law degree. He then worked as a European Patent Attorney at Cabinet Plasseraud, advising deep-learning and machine-learning companies on IP strategy. Crunchbase lists his location as London, United Kingdom.
Crunchbase counts 62 investments for Wolf, with 0 lead investments, 0 exits and 0 companies founded. Other databases give different totals, so treat any single count as approximate. He usually appears as one of several named angels in a round led by a venture firm.
Recent examples from press and databases: Umony Series A ($15M, led by Notion Capital, September 2025), Minitap seed (EUR 4.1M, December 2025), Corma seed (EUR 3.5M, December 2025), Nozomio Labs seed ($6.2M, October 2025), White Circle seed ($11M, May 2026) and Marker seed ($13M, July 2026).
Crunchbase shows 45 AI investments since 2023. Its AI portfolio list includes Studio Atelico, Visium, Mirai, Lovable, Gradium, White Circle, Stilla AI, Mantic, Twin, Othello, Minitap and RadixArk.
His largest recent round was RadixArk, which launched in May 2026 with a $100M seed at a $400M post-money valuation. Accel led the round and Spark Capital co-led. RadixArk builds open-source AI inference and training infrastructure around the SGLang engine. The Lounge deals desk also lists Runta (Seed, $20M) and BottleCap AI (Seed, $7.5M) among recent AI rounds.
His public record is early-stage and AI-centred: pre-seed, seed and some Series A rounds, in AI applications, AI infrastructure and developer tools. Portfolio companies are based in the US, France, the UK, Sweden and elsewhere in Europe. Wolf has not published a check size or a written investment thesis, and none is stated here. His X bio describes him as a Hugging Face co-founder and an angel.
- RadixArk: open-source AI inference and training infrastructure built on SGLang; $100M seed, May 2026.
- Lovable: AI platform for building apps and websites, based in Stockholm; a $15M pre-Series A in February 2025 is listed.
- White Circle: enterprise AI control platform; $11M seed, May 2026.
- Umony: London AI compliance platform for financial services communications; $15M Series A, September 2025.
- Minitap: mobile development and developer tools for AI; EUR 4.1M seed, December 2025.
- Marker: seed round of $13M, July 2026, with Index Ventures and LocalGlobe among investors.
- Gradium, Mirai, Stilla AI, Mantic, Twin and Othello: on his Crunchbase AI portfolio list.
- crunchbase.com/person/thomas-wolf-125f
- crunchbase.com/person/9ce7cf51-8c94-4eb4-ba7f-1aaae93f125f
- ai.engineer/speakers/thom-wolf
- ray2020.sched.com/speaker/thomwolf
- theorg.com/org/hugging-face/person/thomas-wolf
- en.wikipedia.org/wiki/Hugging_Face
- x.com/Thom_Wolf?lang=en
- morningstar.com/news/business-wire/20260505077157/radixark-launches-wi
AI portfolio
Investing activity
Thomas Wolf has made 62 investments according to Crunchbase. 45 of those investments since 2023 were in AI companies, including Studio Atelico, Visium, Mirai, Lovable and Gradium.
Thomas Wolf appears in 5 AI deals tracked by the Lounge deals desk, rounds totalling $120M. The rounds are mostly Seed and Pre-seed, with a median round size of $8M and the largest at $100M. The most recent are Othello (Seed, $8M, Oct 2026), Runta (Seed, $20M, Jul 2026) and Zaro (Pre-seed, $5.1M, Jun 2026).
Thomas Wolf most often invests alongside Olivier Pomel, Owl Ventures, a16z Speedrun and Chris Larsen, and the companies they back on Lounge are mostly in AI and AI Infrastructure.
Deals
Frequently asked questions about Thomas Wolf
Who is Thomas Wolf?
Thomas Wolf is a co-founder and Chief Science Officer of Hugging Face, the open-source machine learning platform. He is also an active angel investor based in London.
Does Thomas Wolf invest in AI startups?
Yes. Crunchbase lists 45 AI investments since 2023, including RadixArk, Lovable, White Circle, Gradium and Minitap.
What stage does Thomas Wolf invest at?
Public records show mostly pre-seed and seed rounds, plus some Series A rounds such as Umony. He typically joins alongside a lead venture investor.
What is Thomas Wolf's check size?
It is not public. He has not stated a check size, and public round data does not show his individual amounts.
Does Thomas Wolf lead rounds?
Crunchbase shows 0 lead investments. Press coverage lists him as one of several angels in rounds led by funds such as Accel or Notion Capital.
How can founders contact Thomas Wolf?
He is on LinkedIn and on X as @Thom_Wolf, and his personal site is thomwolf.io. A warm introduction from a portfolio founder or co-investor is the more common route.
Is Thomas Wolf an angel investor?
Yes. Thomas Wolf invests personally as an angel. Crunchbase counts 62 investments.
What AI companies has Thomas Wolf invested in?
Thomas Wolf's AI investments include Studio Atelico, Visium, Mirai, Lovable, Gradium, White Circle, Stilla AI and Mantic. The 5 rounds on Lounge are listed on this page with amounts, dates and co-investors.
Where is Thomas Wolf based?
Thomas Wolf is based in London, United Kingdom.
Who does Thomas Wolf co-invest with?
Thomas Wolf's most frequent co-investors on Lounge are Olivier Pomel (2 deals), Owl Ventures (1 deal), a16z Speedrun (1 deal), Chris Larsen (1 deal) and Ryan King (1 deal).