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Y Combinator

Organization

A prominent startup accelerator that funds early-stage companies. It was the initial home of OpenAI and is currently seeing a significant increase in startups focused on physical AI and robotics.


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7/26/2025, 6:41:54 AM

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7/26/2025, 6:43:45 AM

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7/26/2025, 6:43:45 AM

Summary

Y Combinator (YC) is a prominent American technology startup accelerator and venture capital firm, established in March 2005. It has played a pivotal role in launching over 5,000 companies, including industry giants like Airbnb, Coinbase, DoorDash, Dropbox, Instacart, Reddit, Stripe, and Twitch. By January 2021, the combined valuation of its top companies surpassed $300 billion, with overall portfolio valuation exceeding $600 billion. YC's accelerator program, which began in Boston and Mountain View, consolidated its operations to Silicon Valley in 2009, expanded to San Francisco in 2019, and transitioned to an entirely online format during the COVID-19 pandemic. Recognized by Forbes in 2012 as one of Silicon Valley's most successful startup accelerators, YC continues to influence the startup landscape by investing in early-stage enterprises, providing intensive mentorship, and fostering innovation, including supporting the rise of physical AI companies and the democratization of software development through 'Vibe Coding' and initially backing OpenAI.

Referenced in 1 Document
Research Data
Extracted Attributes
  • Type

    Technology startup accelerator, Venture capital firm

  • Country

    United States

  • Founded

    2005-03-01

  • Founders

    Paul Graham, Jessica Livingston, Robert Tappan Morris, Trevor Blackwell

  • Key People

    Garry Tan (CEO), Michael Seibel, Paul Buchheit (Partner)

  • Recognition

    One of Silicon Valley's most successful startup accelerators (Forbes, 2012)

  • Headquarters

    San Francisco, California, United States

  • Program Focus

    Intensive mentorship, financial support, network access, product development, fundraising

  • Investment Focus

    Seed investments in early-stage enterprises, companies with 'excellent' concepts

  • Resources Offered

    Y Combinator Library, Startup School, YC Startup Library, Batch program, Office Hours, Demo Day

  • Companies Launched

    Over 5,000

  • Combined Valuation of Top Companies

    Over $300 billion (by January 2021), Over $600 billion (overall)

Timeline
  • Y Combinator (YC) was founded and launched operations with concurrent programs in Cambridge, Massachusetts, and Mountain View, California. (Source: summary, web_search_results)

    2005-03-01

  • Made its first investments in the summer of 2005. (Source: web_search_results)

    2005-06-01

  • Consolidated operations to Silicon Valley (Mountain View), closing the Cambridge program due to operational complexities. (Source: web_search_results)

    2009-01-01

  • Forbes recognized Y Combinator as one of Silicon Valley's most successful startup accelerators. (Source: summary, dbpedia)

    2012

  • Expanded its accelerator program to San Francisco. (Source: summary, wikipedia)

    2019

  • Transitioned its accelerator program to an entirely online format during the COVID-19 pandemic. (Source: summary, wikipedia)

    2020

  • The combined valuation of YC's top companies exceeded $300 billion. (Source: summary, dbpedia)

    2021-01-01

Y Combinator

Y Combinator, LLC (YC) is an American technology startup accelerator and venture capital firm launched in March 2005 which has been used to launch more than 5,000 companies. The accelerator program started in Boston and Mountain View, expanded to San Francisco in 2019, and was entirely online during the COVID-19 pandemic. Companies started via Y Combinator include Airbnb, Coinbase, Cruise, DoorDash, Dropbox, Instacart, Reddit, Stripe, Scale AI, Deel, Helion Energy, and Twitch.

Web Search Results
  • Y Combinator - Wikipedia

    Y Combinator, LLC (YC) is an American technology startup accelerator and venture capital firm launched in March 2005( which has been used to launch more than 5,000 companies.( The accelerator program started in Boston and Mountain View, expanded to San Francisco in 2019, and was entirely online during the COVID-19 pandemic.( Companies started via Y Combinator include Airbnb, Coinbase, Cruise "Cruise (autonomous vehicle)"), DoorDash, Dropbox "Dropbox (service)"), Instacart, Reddit, Stripe [...] This article is about the company. For the mathematical concept, see Y combinator (mathematics) "Y combinator (mathematics)"). Y Combinator Management, LLCImage 4 Company typePrivate IndustryStartup accelerator Founded March 2005; 20 years ago(2005-03) FoundersPaul Graham "Paul Graham (programmer)"), Jessica Livingston, Robert Tappan Morris, Trevor Blackwell HeadquartersSan Francisco, California , United States Number of locations 2 offices (2014) Key peopleGarry Tan (CEO) Michael Seibel [...] History ------- [edit] Founded in 2005 by Paul Graham "Paul Graham (programmer)"), Jessica Livingston, Robert Tappan Morris, and Trevor Blackwell,( Y Combinator (YC) initiated operations with concurrent programs in Cambridge, Massachusetts, and Mountain View, California. However, operational complexities arising from managing two programs prompted a consolidation in January 2009, resulting in the closing of the Cambridge program and the centralization of activities in Silicon Valley.(

  • Top 100 Y Combinator Companies - Eqvista

    Y Combinator is a venture capital firm that specializes in seed investments in early-stage enterprises. It provides finance, business consultancy, and other services to 2-4 person businesses wanting to turn a concept into a product. Y Combinator prioritizes companies with“excellent” concepts over those with expertise and a business model. In the summer of 2005, the business made its first investments. Y Combinator chooses companies to invest in and consult with twice a year. They’re based in [...] Y Combinator (YC) is a startup accelerator and fund. YC has made over 5,000 investments since 2005, including Airbnb, DoorDash, Stripe, Instacart, Dropbox, and Coinbase. The total value of YC companies exceeds $600 billion. YC offers training and services to help founders succeed throughout the life of their businesses. The fundamentals of launching a business are taught at Startup School. The YC batch program assists founders in developing their idea, communicating with clients, and raising [...] Y Combinator is a venture capital firm that invests in businesses. Seed money is the first round of venture capital. While you’re getting started, it covers your expenses. Some businesses may only require an initial investment. Y Combinator (YC) is a technology startup accelerator in the United States that was founded in March 2005. Y Combinator is a business accelerator that invests twice a year in a diverse variety of startups. Stripe, Airbnb, Cruise, PagerDuty, DoorDash, Coinbase, Instacart,

  • Y Combinator: A Comprehensive Analysis of the World's Leading ...

    YC has expanded its reach through the Y Combinator Library, an online platform offering a wide array of resources, advice, and tools for startups worldwide. This initiative has significantly increased YC’s global impact and accessibility. The Y Combinator Library includes various resources such as the Startup School, which provides free online courses and resources for startup founders, and the YC Startup Library, which contains articles, videos, and guides on starting and running a startup. [...] Conclusion ========== Y Combinator has undeniably transformed the startup landscape, setting new standards for accelerator programs worldwide. Its unique approach, combining substantial financial support with intensive mentorship and a vast network, has proven highly effective in nurturing successful startups. [...] In conclusion, Y Combinator’s impact on the startup world is profound and multifaceted. Its success in identifying and nurturing high-potential startups, coupled with its ability to adapt and scale its model, positions it as a continued driving force in the global innovation economy. — - This research and report were fully produced byKompas AI. Using AI, you can create high-quality reports in just a few minutes. Image 3

  • Y Combinator

    We don't tell you what to do. We only offer advice. Hear more from the community. Image 34: Marc Andreessen headshot "Y Combinator is the best program for creating top-end entrepreneurs that has ever existed." Marc Andreessen, General Partner, Andreessen Horowitz Image 35: Ron Conway headshot "Y Combinator is the best startup accelerator in the world. YC helps their companies a lot, and the YC community is a huge asset for the companies that go through the program." Ron Conway, [...] We help founders make something people want and the results speak for themselves. We help founders at their earliest stages regardless of their age. We improve the success rate of our startups. We give startups a huge fundraising advantage. Our companies have a track record of becoming billion dollar companies. Our formula for success. YC is run by startup founders who have built exactly what they wanted when starting and growing a startup. The most experienced partners [...] Y Combinator =============== Image 1: Y Combinator About What Happens at YC?ApplyYC Interview GuideFAQPeopleYC Blog Companies Startup DirectoryFounder DirectoryLaunch YC Startup Jobs All Jobs◦ Engineering◦ Operations◦ Marketing◦ SalesStartup Job GuideYC Startup Jobs Blog Find a Co-Founder Library SAFE Resources Startup SchoolNewsletterRequests for StartupsFor InvestorsHacker NewsBookface Open main menu Apply for F2025 batch.Apply Y Combinator Make something people want.

  • About Y Combinator

    The overall goal of YC is to help startups really take off. They arrive at YC at all different stages. Some haven’t even started working yet, and others have been launched for a year or more. But whatever stage a startup is at when they arrive, our goal is to help them to be in dramatically better shape 3 months later. For most startups, better shape translates into two things: to have a better product with more users, and to have more options for raising money. [...] 1. THE YC PROGRAM 1. The Goal 2. Funding 3. Groups 4. Office Hours 5. Bookface 6. Batch Kickoff 7. Alumni Talks 8. Public Launches 9. First Customers 10. Weekly Meetups 11. Demo Day 1. ADVICE 1. Ongoing office hours 1. COMMUNITY 1. Alumni community 2. Alumni Reunion 3. Founder Communities 4. Alumni Demo Day 5. Deals 1. BRAND 1. Credibility 2. Company Directory 1. HIRING 1. Work at a Startup 2. Hacker News ## Footer [...] About Y Combinator | Y Combinator Y Combinator About What Happens at YC?ApplyYC Interview GuideFAQPeopleYC Blog Companies Startup DirectoryFounder DirectoryLaunch YC Startup Jobs All Jobs◦ Engineering◦ Operations◦ Marketing◦ SalesStartup Job GuideYC Startup Jobs Blog Find a Co-Founder Library SAFE Resources Startup SchoolNewsletterRequests for StartupsFor InvestorsHacker NewsBookface Open main menu Apply for F2025 batch.Apply # What Happens at YC ### INTRODUCTION

Y Combinator (YC) is an American technology startup accelerator launched in March 2005. It has been used to launch more than 3,000 companies, including Airbnb, Coinbase, Cruise, DoorDash, Dropbox, Instacart, Quora, PagerDuty, Reddit, Stripe and Twitch. The combined valuation of the top YC companies was more than $300 billion by January 2021. The company's accelerator program started in Boston and Mountain View, expanded to San Francisco in 2019, and has been entirely online since the start of the COVID-19 pandemic. Forbes characterized the company in 2012 as one of the most successful startup accelerators in Silicon Valley.

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Location Data

Y Combinator, 580, 20th Street, Pier 70, San Francisco, California, 94158, United States

startup incubator

Coordinates: 37.7607771, -122.3866356

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