Greg Brockman
About Greg Brockman
Greg Brockman is a software engineer and entrepreneur based in San Francisco. He began his career at Stripe in 2010 after leaving MIT, and became its CTO in 2013. He left Stripe in 2015 to co-found OpenAI, where he also served as CTO.
He is now OpenAI's president and co-founder, and Crunchbase also lists him as chairman. Earlier, he was a team member at Ksplice.
Brockman invests personally, separate from his OpenAI role. Public databases count his deals differently. Crunchbase lists 37 investments, while Tracxn lists 20 portfolio companies, so treat any total as approximate. Tracxn dates the start of his startup investing to Triplebyte in 2015.
Dated deals in public records include Prefer (Series A, May 2017), Command E (seed, May 2020), Gadget (December 2021), Deepnote (January 2022), Baseten (April 2022), Lumos (May 2022), Gantry (June 2022), Uplimit (September 2022), Lambda (Series B, October 2022) and Braintrust (Series A, October 2024).
His recorded AI and ML infrastructure investments include Hugging Face, Scale AI, Lambda, Braintrust, Gantry, Baseten, Datasaur and Sandbar. Braintrust offers tooling for AI evaluations and data management. Lambda raised a $44M Series B in October 2022, and Braintrust raised a $36M Series A in October 2024, according to Tracxn. Both rounds included other investors.
NFX Signal ranks him in AI, developer tools and SMB software, at pre-seed and seed. It lists a check range of $100K to $5.0M with a $1.5M sweet spot. That range comes from a third-party profile, not a statement by Brockman. We found no public statement from him about what he looks for in founders.
Tracxn says his investments are mostly in the United States and the United Kingdom, with a few other countries.
- Braintrust: AI evaluation and data tooling; Series A, October 2024.
- Lambda: AI infrastructure; Series B, October 2022.
- Baseten: machine learning infrastructure; invested April 2022.
- Gantry: AI product tooling; Series A, June 2022.
- Sandbar: seed round, 2023; Brockman is listed as an investor.
- Command E: seed round, May 2020.
- Hugging Face and Scale AI: listed by Tracxn as his most notable investments; investment years not confirmed.
- Gadget: developer platform; invested December 2021.
- en.wikipedia.org/wiki/Greg_Brockman
- crunchbase.com/person/greg-brockman
- signal.nfx.com/investors/greg-brockman
- tracxn.com/d/people/greg-brockman/__8t7dxLWN3g80J7DwCD_GkL2hF7c3m09eLH
- areteindex.com/angels/greg-brockman
- evalyze.ai/investors/greg-brockman
- askforfunding.com/investor/greg-brockman-angel-investor
Investing activity
Greg Brockman is listed on Lounge as an angel investor based in San Francisco, CA. The deals desk records Series A and later AI rounds and seeds over $10M, so smaller checks may not show here yet.
Deals
Frequently asked questions about Greg Brockman
Does Greg Brockman invest in startups as an angel?
Yes. Crunchbase lists 37 personal investments, and Tracxn lists 20 portfolio companies. Counts differ by source.
What stage does Greg Brockman invest in?
NFX Signal ranks him mainly at pre-seed and seed. His recorded deals also include Series A and Series B rounds, such as Braintrust and Lambda.
What is Greg Brockman's check size?
NFX Signal lists $100K to $5.0M with a $1.5M sweet spot. This is a third-party listing, and he has not confirmed it publicly as far as we found.
What sectors does Greg Brockman back?
Mainly AI, developer tools and SMB software, per NFX Signal. His portfolio also includes enterprise software, machine learning infrastructure and some fintech and bio companies.
Who is Greg Brockman?
He is a co-founder and the president of OpenAI. He was Stripe's first CTO and joined Stripe in 2010.
How can founders reach Greg Brockman?
He has a LinkedIn profile and a personal site at gregbrockman.com. Founders may also look for a warm introduction through shared investors or networks.
Is Greg Brockman an angel investor?
Yes. Greg Brockman invests personally as an angel.
Where is Greg Brockman based?
Greg Brockman is based in San Francisco, CA.