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# Y Combinator
- URL: https://www.whiteroseintelligence.com/y-combinator/
- Published: 1999-01-03T03:21:00.000Z
- Updated: 2025-01-04T06:22:00.000Z
- Author: Liam Sturgess
- Tags: Profiles, #docs, #organization

**Y Combinator (YC)** is an American technology startup accelerator based in Mountain View, California.

## History

Y Combinator was founded on March 11, 2005 by Paul Graham, Jessica Livingston, Robert Morris and Trevor Blackwell.[\[1\]](#fn1) The original name for the company was "Cambridge Seed," but this was changed to Y Combinator by the time they announced it publicly a few days later.[\[2\]](#fn2) Their first ever batch of startups was 9 companies large, including Loopt and Reddit.[\[3\]](#fn3)

From 2005 to 2008, YC ran programs in both Cambridge, Massachusetts and Mountain View, California. In January 2009, Graham announced that only the California program would continue, as he and Livingston (his wife) were expecting their first child.[\[4\]](#fn4)

In June 2012, [General Catalyst](https://www.whiteroseintelligence.com/General-Catalyst) joined the Y Combinator Start Fund, "the consortium of top investors who are backing every Y Combinator company."[\[5\]](#fn5)

## Portfolio

Companies that have been part of Y Combinator's portfolio include:[\[3:1\]](#fn3)[\[6\]](#fn6)

- [80,000 Hours](https://www.whiteroseintelligence.com/80000-Hours)[\[7\]](#fn7)
- Automate Ads[\[8\]](#fn8)
- Benchling
- ClickFacts
- Docker
- Flexport
- Flock Safety
- [GEn1E Lifesciences](https://www.whiteroseintelligence.com/GEn1E-Lifesciences)[\[9\]](#fn9)
- GoCardless
- Helion Energy
- HelixNano[\[10\]](#fn10)
- Infogami
- Instacart
- Kiko
- Lattice
- Loopt
- Memamp
- Monzo Bank
- [New Incentives](https://www.whiteroseintelligence.com/New-Incentives)[\[11\]](#fn11)
- OpenSea
- Opentrons
- Our World in Data[\[12\]](#fn12)
- Parakey
- [PreDxion Bio](https://www.whiteroseintelligence.com/PreDxion-Bio)[\[13\]](#fn13)
- Reddit
- Relativity Space
- Scale AI
- Sift
- Simmery
- Solugen
- Stripe
- Substack[\[14\]](#fn14)
- TextPayMe
- Truepill
- Vetcove
- Zapier

## External links

- [Campfire Wiki](https://www.campfire.wiki/doku.php?id=y%5Fcombinator)
- [Golden](https://golden.com/wiki/Y%5FCombinator-6M)
- [Website](https://www.ycombinator.com/)
- [Wikipedia](https://en.wikipedia.org/wiki/Y%5FCombinator)
- [Wikispooks](https://wikispooks.com/wiki/Y%5FCombinator)

---

1. Jackson, C. (2012, August 5). *Y Combinator’s First Batch: Where Are They Now?* TNW | Insider. <http://archive.today/2023.03.14-073931/https://thenextweb.com/news/y-combinators-first-batch-where-are-they-now> [↩︎](#fnref1)
2. Graham, P. (2012, March 15). *How Y Combinator Started.* Y Combinator. <https://web.archive.org/web/20140717042134/http://old.ycombinator.com/start.html> [↩︎](#fnref2)
3. *Query | 9 results.* Golden. Retrieved July 28, 2023, from <https://web.archive.org/web/20230728034607/https://golden.com/query/p/WzYsW1sxMzYsW1stMSwwLCJhbnkiLGZhbHNlLFs1MzU0OTI4XSxudWxsXV1dXSxmYWxzZSxbXSxbXV0/> [↩︎](#fnref3) [↩︎](#fnref3:1)
4. Graham, P. (2009, January). *California Year-Round.* Y Combinator. <https://web.archive.org/web/20170306095108/http://old.ycombinator.com/ycca.html> [↩︎](#fnref4)
5. Eldon, E. (2012, June 12). *General Catalyst Joins SV Angel, Andreessen And Yuri Milner To Invest In The Y Combinator Start Fund.* TechCrunch. <http://archive.today/2013.02.03-191446/http://techcrunch.com/2012/06/12/general-catalyst-partners-up-with-sv-angel-andreesen-and-yuri-milner-to-invest-in-y-combinator-start-fund/> [↩︎](#fnref5)
6. *Top Companies by Valuation.* Y Combinator. Retrieved July 28, 2023, from <https://web.archive.org/web/20230728040059/https://www.ycombinator.com/topcompanies/valuation> [↩︎](#fnref6)
7. Todd, B. (2015, August 5). *What’s it like being a nonprofit in Y Combinator?* 80,000 Hours. <https://web.archive.org/web/20220922094728/https://80000hours.org/2015/08/why-is-80000-hours-in-y-combinator-as-a-non-profit-and-whats-it-like/> [↩︎](#fnref7)
8. Dickson, C. (2018, October 30). *Who Is Gab Founder Andrew Torba?* HuffPost. <http://archive.today/2020.10.24-201348/https://www.huffpost.com/entry/gab-founder-andrew-torba%5Fn%5F5bd89d70e4b0dee6eececbc5?guccounter=1> [↩︎](#fnref8)
9. *About Us.* GEn1E Lifesciences. Retrieved May 1, 2023, from <https://web.archive.org/web/20230501230145/https://www.gen1e.com/about-us#Investors> [↩︎](#fnref9)
10. *Helix Nanotechnologies: Using AI to cure genetic disease.* Y Combinator. Retrieved January 2, 2023, from <https://web.archive.org/web/20230102060849/https://www.ycombinator.com/companies/helix-nanotechnologies> [↩︎](#fnref10)
11. *About Us.* New Incentives. Retrieved November 25, 2022, from <http://archive.today/2022.11.25-064921/https://www.newincentives.org/about> [↩︎](#fnref11)
12. Roser, M., Ritchie, H., Ortiz-Ospina, E., Mispy, J., Hasell, J., & Gavrilov, D. (2019, January 25). *Our World in Data is at Y Combinator.* Our World in Data. <http://archive.today/2019.02.07-182753/https://ourworldindata.org/owid-at-ycombinator> [↩︎](#fnref12)
13. *PreDxion Bio.* Crunchbase. Retrieved July 27, 2023, from <https://www.crunchbase.com/organization/predxion-bio/company%5Ffinancials> [↩︎](#fnref13)
14. *Substack - Funding, Financials, Valuation & Investors.* Crunchbase. Retrieved December 27, 2022, from <https://web.archive.org/web/20221227060528/https://www.crunchbase.com/organization/substack/company%5Ffinancials/investors> [↩︎](#fnref14)