Lukas Biewald
American entrepreneur (born 1981)
Lukas Biewald (born 1981) is an American entrepreneur and a prominent figure in artificial intelligence. He is recognized for his contributions to machine learning and as the CEO and co-founder of Weights & Biases, a company that builds developer tools for AI, that sold to CoreWeave in 2025 for $1.7B. He previously founded and was CEO of Figure Eight, a human-in-the-loop machine learning platform.2
From Wikipedia’s article on Lukas Biewald (this version), CC BY-SA 4.0.
Born 1981.1
About
He has co-authored 26 AI research papers from 2004 through 2018.
From Wikipedia’s article on Lukas Biewald, shared under CC BY-SA 4.0.2
Companies
- Figure EightFounder10
Early life and education
Biewald was born in Boston, Massachusetts in 1981. He attended Cambridge Rindge and Latin School and later earned both a Bachelor's and Master's degree in Computer science from Stanford University.
From Wikipedia’s article on Lukas Biewald (this version), CC BY-SA 4.0.
Career
Occupation: businessperson.5
- Date not recordedFounded Figure Eight4
Early career
After graduation, Biewald joined Yahoo! as an engineer, working on machine translations to improve search results, and eventually led the Search Relevance Team for Yahoo! Japan. He later joined Powerset, a natural language search technology company, as their Senior Scientist, which was acquired by Microsoft in 2008 for an estimated $100M.
Figure Eight
In 2007, Biewald co-founded Figure Eight (formerly CrowdFlower), a data labeling and crowdsourcing company that created datasets for training machine learning models. Figure Eight was acquired by Appen in 2019 for $300 million.
Weights and Biases
In 2017, Biewald co-founded Weights & Biases with Chris Van Pelt and Shawn Lewis. The company provides tools for tracking machine learning experiments, model management, and collaborative AI and LLM app development. The platform has been adopted by organizations such as OpenAI, Salesforce, and Microsoft. In March 2025 Coreweave acquired Weights and Biases at $1.7 billion, with the transaction closing on May 5, 2025.
From Wikipedia’s article on Lukas Biewald (this version), CC BY-SA 4.0.
Personal life
Links
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1WikidataLukas Biewald on Wikidata
- 2WikipediaLukas Biewald on Wikipedia
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- 9WikidataLukas Biewald: X, on Wikidata
- 10WikidataFigure Eight, Founder
- 11Wikimedia CommonsLukas Biewald photo by Kris Krüg, CC BY-SA 2.0