Wojciech Zaremba
About Wojciech Zaremba
Wojciech Zaremba is a Polish computer scientist, born in 1988 in Kluczbork, and a co-founder of OpenAI. He studied at the University of Warsaw and École Polytechnique, and earned a PhD at New York University under Yann LeCun and Rob Fergus. His thesis was titled Learning algorithms from data. Before OpenAI he worked at Google Brain and Facebook AI Research.
At OpenAI he first led the robotics work, including a robotic hand that solved a Rubik's Cube. After that team was dissolved in 2020, he led teams working on GPT models, GitHub Copilot and Codex. He lives in the San Francisco Bay Area. He is also listed as an advisor to Growbots and the Qualia Research Institute.
Crunchbase lists two personal investments for Zaremba: a seed round in Onepot AI and an angel round in Blueprint, the company associated with Bryan Johnson. Crunchbase's activity feed dates these to late 2025. Beyond those two entries and the Wafer round below, no complete public list of his angel deals was found. He does not appear to publish a portfolio page.
Zaremba took part in the $4M seed round of Wafer, announced in April 2026. Fifty Years led the round, with Liquid 2 Ventures and Y Combinator participating. Press coverage names him and Jeff Dean as angel investors in that round.
Wafer builds AI agents that optimize AI inference infrastructure. The company later raised a $40M Series A. Press reports do not say whether Zaremba took part in that round.
Based on the public record, Zaremba's disclosed angel activity is in early-stage AI companies, with Wafer at seed stage in AI infrastructure. He has not publicly stated a check size, a stage preference or what he looks for in a pitch. Lounge has no confirmed information on his geographic focus.
- Wafer: builds AI agents that optimize AI inference infrastructure. Zaremba was an angel in the $4M seed round announced in April 2026.
- Onepot AI: listed on Crunchbase as a seed round he invested in. Crunchbase's activity feed dates it to November 2025.
- Blueprint (Bryan Johnson): listed on Crunchbase as an angel round he invested in. Crunchbase's activity feed dates it to October 2025.
- en.wikipedia.org/wiki/Wojciech_Zaremba
- crunchbase.com/person/wojciech-zaremba
- cbinsights.com/investor/fifty-years-fund
- wafer.ai/blog/seed-round
- superbcrew.com/wafer-raises-40m-in-series-a-funding-round
- wikidata.org/wiki/Q27733815
- foresight.org/people/wojciech-zaremba
- x.com/woj_zaremba/status/1952476134811259242
Investing activity
Wojciech Zaremba appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $4M. The most recent is Wafer (Seed, $4M, Apr 2026).
Wojciech Zaremba most often invests alongside Fifty Years, Jeffrey Dean, Liquid 2 Ventures and Y Combinator, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Wojciech Zaremba
Is Wojciech Zaremba an angel investor in AI startups?
Yes. He was an angel in Wafer's $4M seed round in April 2026, and Crunchbase lists two personal investments, in Onepot AI and Blueprint.
What AI companies has Wojciech Zaremba invested in?
Publicly documented investments are Wafer (AI inference optimization), Onepot AI and Blueprint. No complete portfolio list is public.
What is Wojciech Zaremba's check size?
He has not disclosed a check size. Wafer's round was $4M in total, and individual angel amounts were not published.
Who is Wojciech Zaremba?
He is a co-founder of OpenAI who led its robotics work and later teams behind GPT models, Copilot and Codex. He has a PhD from New York University.
What stage does Wojciech Zaremba invest in?
His documented AI deal is a seed round, with Wafer in April 2026. He has not stated a formal stage preference.
How can founders contact Wojciech Zaremba?
He has a personal site at wojzaremba.com and posts on X as @woj_zaremba. Founders should check his public channels, since he has not published pitch guidelines.
Is Wojciech Zaremba an angel investor?
Yes. Wojciech Zaremba invests personally as an angel.
What stage does Wojciech Zaremba invest at?
In the rounds tracked on Lounge, Wojciech Zaremba has invested at Seed, with a median round of $4M.
Who does Wojciech Zaremba co-invest with?
Wojciech Zaremba's most frequent co-investors on Lounge are Fifty Years (1 deal), Jeffrey Dean (1 deal), Liquid 2 Ventures (1 deal) and Y Combinator (1 deal).
How can founders reach Wojciech Zaremba?
Founders on Lounge can see Wojciech Zaremba's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Wojciech Zaremba to their Investor Pipeline to track the conversation.