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{{Infobox company
{{Matrad/Código|data=25 de julho|marcação=20120725}}
| company_name = Y Combinator
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| company_logo = [[File:Y-combinator-logo.gif|260px|Y Combinator]]
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| company_type = [[Limited liability company]]
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| foundation = March, 2005
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| key_people = [[Paul Graham (computer programmer)|Paul Graham]], [[Trevor Blackwell]], [[Paul Buchheit]], [[Jessica Livingston]], [[Robert Tappan Morris|Robert Morris]], [[Harj Taggar]]
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| location = [[Mountain View, California]]
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| industry = [[Venture capital]]
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| products = Investments
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| assets =
| homepage = {{URL|http://www.ycombinator.com/}}
| num_employees =
}}
'''Y Combinator''' is an American [[seed accelerator]], started in March 2005. Y Combinator provides [[seed money]], advice, and connections at two 3-month programs per year. In exchange, they take an average of about 6% of the company's equity.<ref>{{cite news|url=http://www.nytimes.com/2006/02/21/business/businessspecial2/21startup.html?pagewanted=print|title=Running a Hatchery for Replicant Hackers|accessdate=2008-08-27|publisher=New York Times | date=2006-02-21}}</ref>
==Program==
{{refimprove section|date=November 2011}}
The program consists of weekly dinners where guests come to speak to the founders. The dinners last for the duration of the three month program, but all founders have the life-long ability to book office hours with the Y Combinator venture partners.
Compared to other startup funds, Y Combinator itself provides very little money ($14,000 for startups with 1 founder, $17,000 for startups with 2 founders, and $20,000 for those with 3 or more<ref name=ycfaq>{{cite web |url=http://ycombinator.com/faq.html |title=Y Combinator Frequently Asked Questions}}</ref>), though Yuri Milner and SV Angel offer every Y Combinator company a $150,000 [[Convertible note|convertible note investment]].<ref>{{cite web|url=http://techcrunch.com/2011/08/01/start-fund-and-sv-angel-invest-9-million-in-new-y-combinator-startups |title=Start Fund and SV Angel Invest $9 million in new Y Combinator Startups |publisher=TechCrunch |date=2011-08-01 |accessdate=2011-08-02}}</ref> This reflects co-founder [[Paul Graham (computer programmer)|Paul Graham's]] theory that between [[free software]], [[dynamic programming language|dynamic languages]], the web, and [[Moore's Law]], the cost of founding an information technology startup has greatly decreased.<ref>{{cite web|url=http://www.businessweek.com/smallbiz/content/oct2007/sb20071019_378998.htm?chan=technology_technology+index+page_top+stories|title=Planning for a Crush of Startups|accessdate=2008-08-27|publisher=BusinessWeek}}</ref> ''[[Wired (magazine)|Wired]]'' has called Y Combinator a "boot camp for startups" and "the most prestigious program for budding digital entrepreneurs".<ref>{{cite news|url=http://www.wired.com/magazine/2011/05/ff_ycombinator/all/1|title=Y Combinator Is Boot Camp for Startups|accessdate=2011-06-24|publisher=Wired|first=Steven|last=Levy|date=2011-05-17}}</ref>
The firm is named after a construct in the theory of functional programming called the "[[Y Combinator]]".<ref>See [http://www.ycombinator.com/faq.html Y Combinator FAQ]'''Why did you choose the name "Y Combinator?"''' The Y combinator is one of the coolest ideas in computer science. It's also a metaphor for what we do. It's a program that runs programs; we're a company that helps start companies.</ref>
The average valuation of a Y Combinator-backed company, according to co-founder [[Paul Graham (computer programmer)|Paul Graham]], is $22.4 million.<ref>{{cite web|url=http://techcrunch.com/2011/06/01/paul-graham-total-value-of-y-combinator-funded-startups-is-4-7-billion|title=Paul Graham: Total Value Of Y Combinator-Funded Startups Is $4.7 Billion|accessdate=2011-08-02|publisher=TechCrunch}}</ref>
==History==
From its inception to 2008, one program was held in each of the US cities of [[Cambridge, Massachusetts]] and [[Mountain View, Santa Clara County, California|Mountain View, California]]; in January 2009, Y Combinator announced that henceforth the Cambridge program would be closed and all future programs would take place in [[Silicon Valley]].<ref>{{cite web|url=http://ycombinator.com/ycca.html|publisher=Y Combinator|title=California Year-Round|accessdate=2009-01-29}}</ref>
In 2009, Y Combinator partnered with [[Sequoia Capital]] and angel investors such as [[Ron Conway]], [[Paul Buchheit]] and Aydin Senkut to further the support of the young startups with increased funding.<ref>{{cite web|url=http://techcrunch.com/2009/03/16/y-combinator-gets-the-sequoia-capital-seal-of-approval/ |title=Y Combinator Gets The Sequoia Capital Seal Of Approval |publisher=TechCrunch |date=2009-05-16 |accessdate=2011-02-10}}</ref>
Starting in 2011, Yuri Milner and SV Angel offer every Y Combinator company a $150,000 convertible note investment.<ref>{{cite web|url=http://techcrunch.com/2011/08/01/start-fund-and-sv-angel-invest-9-million-in-new-y-combinator-startups |title=Start Fund and SV Angel Invest $9 million in new Y Combinator Startups |publisher=TechCrunch |date=2011-08-01 |accessdate=2011-08-02}}</ref>
Late that year, in response to widespread support for the [[Stop Online Piracy Act]] (SOPA) pending in the U.S. Congress, Graham announced that no representative of any company supporting it would be welcome at Y Combinator's Demo Days, and urged startups the company was already supporting to boycott SOPA supporters as well.<ref name="Demo Day SOPA cutoff">{{cite news|last=Tsotsis|first=Alex|title=Paul Graham: SOPA Supporting Companies No Longer Allowed At YC Demo Day|url=http://techcrunch.com/2011/12/22/paul-graham-sopa-supporting-companies-no-longer-allowed-at-yc-demo-day/|newspaper=[[TechCrunch]]|date=December 22, 2011|accessdate=December 23, 2011}}</ref>
==People==
Y Combinator was founded in March 2005 by Paul Graham with his Viaweb co-founders [[Robert Tappan Morris|Robert Morris]] and [[Trevor Blackwell]], as well as [[Jessica Livingston]] who later became his wife. In early 2010, Harj Taggar, cofounder of Y Combinator-funded Auctomatic joined as an advisor. In September 2010, Alexis Ohanian, co-founder of Y Combinator-backed [[Reddit]], joined.<ref>{{cite web|author=Wednesday, September 1st, 2010 |url=http://techcrunch.com/2010/09/01/reddit-cofounder-alexis-ohanian-to-join-y-combinator/ |title=Reddit Cofounder Alexis Ohanian To Join Y Combinator |publisher=TechCrunch |date=2010-09-01 |accessdate=2012-02-28}}</ref> In November 2010, [[Gmail]] creator [[Paul Buchheit]] and Taggar were named partners.<ref>{{cite web|last=Graham |first=Paul |url=http://ycombinator.posterous.com/y-combinator-announces-two-new-partners-paul |title=Y Combinator announces two new partners, Paul Buchheit and Harj Taggar |publisher=Y Combinator Posterous |date=2010-11-12 |accessdate=2012-02-28}}</ref> In January 2011, Y Combinator-backed Posterous co-founder Garry Tan joined as designer-in-residence.<ref>{{cite web|last=Melanson |first=Mike |url=https://www.readwriteweb.com/archives/posterous_co-founder_garry_tan_leaves_for_y_combin.php |title=Posterous Co-Founder Garry Tan Leaves for Y Combinator |publisher=Readwriteweb.com |date=2011-01-14 |accessdate=2012-02-28}}</ref>
==Notable portfolio companies==
As of June 2011, Y Combinator had funded 316<ref name=about>{{cite web |url=http://techcrunch.com/2011/06/13/ycombinator-brings-on-alumni-to-be-part-time-partners/ |title=Y Combinator Brings On Alumni To Be "Part Time Partners"}}</ref><ref name=speadsheet>{{cite web |url=http://spreadsheets.google.com/ccc?key=0AkkhSN3vaY4jdF90b1l1Vnl5NmZjaTBNQWlJYVozMEE&hl=en |title=Seed Stage Accelerator companies}}</ref> startups. The number of startups funded in each cycle has been gradually increasing. The first cycle in summer 2005 had eight startups. In the summer 2011 cycle, there were more than 60.
Some of the better-known funded companies include [[Scribd]], [[reddit]], [[Airbnb]], [[Dropbox (storage provider)|Dropbox]], [[Disqus]], and [[Posterous]].<ref name=ycfaq/> <!-- Note: this list is only intended as a short list of famous examples, if you add one name then another should be removed -->
==Related topics==
* [[Hacker News]]
* [[Business incubator]]
* [[AngelPad]]
* [[Techstars]]
==References==
{{reflist}}
==External links==
* {{official|http://www.ycombinator.com}}
{{Private equity and venture capital}}
[[Category:Companies based in Mountain View, California]]
[[Category:Companies established in 2005]]
[[Category:American venture capital firms]]
[[fr:Y Combinator]]
[[ja:Yコンビネータ (企業)]]
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