# List of startup incubators and accelerators in the United States

Tamtam tracks 213 startup incubators and accelerators headquartered in the United States. This list ranks the 50 largest by number of employees on LinkedIn, led by Georgia Institute of Technology, Y Combinator and Microsoft for Startups. Their median headcount is 515. Half of them were founded in 2010 or later. The most common headquarters are San Francisco (8), New York (5) and Palo Alto (4).

This selection of startup incubators and accelerators in the United States comprises a mix of educational institutions, venture capital firms, and technology-focused organizations. Notable entities include Y Combinator, a leading startup accelerator, Microsoft for Startups, which supports new companies with AI services and market access, and Techstars, an active pre-seed investor. Higher education institutions like Georgia Institute of Technology and Lehigh University also feature prominently, indicating their role in fostering early-stage innovation.

The data shows a strong concentration of these organizations in California, particularly in the San Francisco Bay Area, with companies like Y Combinator, X, The Moonshot Factory, 500 Global, and Plug and Play headquartered there. New York also emerges as a significant hub, hosting Techstars and Endeavor. Many of these organizations were founded in the 2000s, suggesting a common era of growth for the startup ecosystem.

🇺🇸 United States · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Georgia Institute of Technology](https://www.tamtam.ai/c/georgia-institute-of-technology) (gatech.edu)<br>Focused technological education and research for over 25,000 students across multiple colleges, fostering innovation through numerous research centers. | Higher Education | 🇺🇸 Atlanta | 19,765 | 1888 |
| 2 | [Y Combinator](https://www.tamtam.ai/c/y-combinator) (ycombinator.com)<br>Leading startup accelerator investing in thousands of companies, providing community, products, and programs to support founders throughout their journey. | Venture Capital and Private Equity Principals | 🇺🇸 | 8,865 | 2005 |
| 3 | [Microsoft for Startups](https://www.tamtam.ai/c/microsoft-for-startups) (microsoft.com)<br>Helps startups grow faster through credits, industry-leading AI services, technical documentation, support, and go-to-market opportunities. | Technology, Information and Internet | 🇺🇸 Redmond | 7,534 |  |
| 4 | [Lehigh University](https://www.tamtam.ai/c/lehigh-university) (www2.lehigh.edu)<br>A premier residential research university offering rigorous academic programs in various fields to undergraduate and graduate students worldwide Located in Pennsylvania | Higher Education | 🇺🇸 Bethlehem | 4,473 | 1865 |
| 5 | [SUNY Downstate Health Sciences University](https://www.tamtam.ai/c/suny-downstate-health-sciences-university) (downstate.edu)<br>Leading urban medical center offering education in medicine, nursing, public health, and health professions with an affiliated university hospital. | Hospitals and Health Care | 🇺🇸 Brooklyn | 3,757 | 1860 |
| 6 | [X, The Moonshot Factory](https://www.tamtam.ai/c/x-the-moonshot-factory) (x.company)<br>A moonshot factory inventing and launching breakthrough technologies to create a radically better world | Research Services | 🇺🇸 Mountain View | 3,149 |  |
| 7 | [500 Global](https://www.tamtam.ai/c/500-global) (500.co)<br>Global venture capital firm investing early in fast-growing technology companies worldwide, with a focus on unlocking long-term value and driving economic growth | Venture Capital and Private Equity Principals | 🇺🇸 Palo Alto | 2,719 | 2010 |
| 8 | [Techstars](https://www.tamtam.ai/c/techstars) (techstars.com)<br>An active pre-seed investor funding thousands of startups annually, Techstars operates accelerators, funds, and networks to support global entrepreneurship with high success rates | Venture Capital and Private Equity Principals | 🇺🇸 New York | 2,635 | 2006 |
| 9 | [Endeavor](https://www.tamtam.ai/c/endeavor-new-york) (endeavor.org)<br>Global community supporting high-impact entrepreneurs in underserved markets through inspiration, investment, and a platform for growth and giving back. | Non-profit Organizations | 🇺🇸 New York | 1,852 | 1997 |
| 10 | [Founder Institute](https://www.tamtam.ai/c/founder-institute) (fi.co)<br>Provides structured accelerator programs and global networks to help founders turn ideas into fundable startups and scale businesses globally. | Professional Training and Coaching | 🇺🇸 Palo Alto | 1,725 | 2009 |
| 11 | [ATC](https://www.tamtam.ai/c/atc-clive) (atc.xyz)<br>Innovative tech company solving business problems with custom software, automation, and IT solutions, as well as funding tech startups and providing training services globally | IT Services and IT Consulting | 🇺🇸 Clive | 1,725 | 2007 |
| 12 | [Plug and Play](https://www.tamtam.ai/c/plug-and-play) (plugandplaytechcenter.com)<br>global platform connecting startups, corporations, investors across multiple industries to foster innovation, investment, and collaboration worldwide. | Venture Capital and Private Equity Principals | 🇺🇸 Sunnyvale | 1,311 | 2006 |
| 13 | [The Research Foundation for SUNY](https://www.tamtam.ai/c/the-research-foundation-for-suny) (rfsuny.org)<br>Supporting SUNY researchers through innovative sponsored programs administration, the RF maximizes SUNY's research impact and fosters technology transfer for economic growth | Education Administration Programs | 🇺🇸 Albany | 1,232 | 1951 |
| 14 | [Google for Startups](https://www.tamtam.ai/c/google-for-startups) (startup.google.com)<br>Connecting startups with people, products, and best practices to help them grow, scale, and solve important challenges. | Technology, Information and Internet | 🇺🇸 San Francisco | 1,141 |  |
| 15 | [ODF](https://www.tamtam.ai/c/odf) (joinodf.com)<br>Helping aspiring entrepreneurs start successful startups by providing guidance, resources, and a supportive community through a program focused on the exploration stage of company building | Technology, Information and Internet | 🇺🇸 San Francisco | 801 | 2019 |
| 16 | [1871](https://www.tamtam.ai/c/1871) (1871.com)<br>A private global innovation hub supporting technology innovators with products, community events, and resources from idea to Fortune 50 | Technology, Information and Internet | 🇺🇸 Chicago | 755 | 2012 |
| 17 | [Atomic](https://www.tamtam.ai/c/atomic-miami) (atomic.vc)<br>venture studio pairing founders with ideas, teams, and resources to build companies, backed by experienced experts and dedicated funding. | Financial Services | 🇺🇸 Miami | 699 | 2012 |
| 18 | [Berkeley SkyDeck](https://www.tamtam.ai/c/berkeley-skydeck) (skydeck.berkeley.edu)<br>An official startup accelerator affiliated with UC Berkeley, providing consulting, resources, mentorship, and connections to help Cal entrepreneurs launch and grow transformative startups | Education Administration Programs | 🇺🇸 Berkeley | 624 | 2012 |
| 19 | [Maesa](https://www.tamtam.ai/c/maesa) (maesa.com)<br>A leading beauty incubator creating innovative brands to make prestige beauty accessible, driven by a belief in beauty's inspirational power | Personal Care Product Manufacturing | 🇺🇸 New York | 588 | 1997 |
| 20 | [LvlUp Ventures](https://www.tamtam.ai/c/lvlup-ventures) (lvlup.vc)<br>Early-stage fund supporting startups with market validation, NextUp accelerator-venture studio, investor pitch decks, and fundraising assistance for going-to-market success | Venture Capital and Private Equity Principals | 🇺🇸 New York | 554 | 2023 |
| 21 | [DFG Ventures](https://www.tamtam.ai/c/dfg-ventures)<br>A Los Angeles venture studio incubating, investing in, operating, and consulting scalable food businesses for the future | Food and Beverage Services | 🇺🇸 Los Angeles | 529 | 2020 |
| 22 | [Alchemist Accelerator](https://www.tamtam.ai/c/alchemist-accelerator) (alchemistaccelerator.com)<br>Venture-backed initiative accelerating seed-stage enterprises with technical co-founders, seeding seventy-five companies annually while facilitating institutional funding rounds through specialized demo day showcases and mentorship. | Fundraising | 🇺🇸 | 528 | 2012 |
| 23 | [Cornell Tech](https://www.tamtam.ai/c/cornell-tech) (tech.cornell.edu)<br>Educates graduate students, develops leaders and technologies for the AI era through research, education, and new ventures, advancing economic and social prosperity. | Higher Education | 🇺🇸 New York | 524 | 2013 |
| 24 | [Unreasonable](https://www.tamtam.ai/c/unreasonable) (unreasonablegroup.com)<br>An international company supporting growth-stage entrepreneurs, connecting investors with exclusive deals, and partnering to address global issues through profit-driven solutions | Venture Capital and Private Equity Principals | 🇺🇸 Boulder | 519 | 2013 |
| 25 | [Florence-Darlington Technical College](https://www.tamtam.ai/c/florence-darlington-technical-college) (fdtc.edu)<br>Providing technical education and training to over 6,000 students across multiple counties with a large, modern campus facility. | Education Administration Programs | 🇺🇸 Florence | 515 |  |
| 26 | [Gold House](https://www.tamtam.ai/c/gold-house) (goldhouse.org)<br>Gold House empowers and elevates Asian Pacific creators and companies through innovative programs and platforms, investing in, uniting, and promoting cultural change | Holding Companies | 🇺🇸 Los Angeles | 514 | 2019 |
| 27 | [MassChallenge](https://www.tamtam.ai/c/masschallenge) (masschallenge.org)<br>A global organization supporting entrepreneurs to innovate and drive sustainable change, with headquarters in the United States and eight international locations | Venture Capital and Private Equity Principals | 🇺🇸 Boston | 504 | 2009 |
| 28 | [Technovation](https://www.tamtam.ai/c/technovation) (technovation.org)<br>Empowers girls globally in tech education, fostering leadership and problem-solving through mobile app coding for real-world issues with mentor support. | Civic and Social Organizations | 🇺🇸 San Francisco | 477 | 2006 |
| 29 | [KiwiTech](https://www.tamtam.ai/c/kiwitech) (kiwitech.com)<br>Global innovation ecosystem and partner offering support to startups, enterprises, and government authorities 600+ portfolio startups and clients like World Bank, P&G, and McKinsey | IT Services and IT Consulting | 🇺🇸 Vienna | 461 | 2009 |
| 30 | [Nucleate](https://www.tamtam.ai/c/nucleate) (nucleate.xyz)<br>A nonprofit organization empowering the next generation of biotech leaders, helping academics build transformational technologies by removing barriers | Biotechnology Research | 🇺🇸 Boston | 422 | 2019 |
| 31 | [Neo](https://www.tamtam.ai/c/neo) (neo.com)<br>Diverse mentorship community, startup accelerator, and VC fund helps tomorrow's tech leaders maximize their potential. | Technology, Information and Internet | 🇺🇸 San Francisco | 417 | 2017 |
| 32 | [Techstars Startup Weekend](https://www.tamtam.ai/c/techstars-startup-weekend) (techstars.com)<br>Educating and inspiring entrepreneurs globally through thousands of events in numerous cities, driven by passionate organizers and volunteers. Over 410K entrepreneurs educated. | Civic and Social Organizations | 🇺🇸 Boulder | 415 | 2007 |
| 33 | [Village Capital](https://www.tamtam.ai/c/village-capital) (vilcap.com)<br>Innovative support for startups addressing social and environmental challenges, providing critical capital and resources for business and impact growth | Non-profit Organizations | 🇺🇸 Washington | 412 | 2009 |
| 34 | [StartX](https://www.tamtam.ai/c/startx-palo-alto) (web.startx.co)<br>A community of entrepreneurs and experts focused on collaboration and impact, providing support and resources without taking equity | Non-profit Organizations | 🇺🇸 Palo Alto | 390 | 2009 |
| 35 | [No Cap](https://www.tamtam.ai/c/no-cap) (nocap.so)<br>It assists founders and investors in expanding their networks and accelerating fundraising efforts through the use of AI technology. | Technology, Information and Internet | 🇺🇸 San Francisco | 389 | 2025 |
| 36 | [Texas Medical Center](https://www.tamtam.ai/c/texas-medical-center) (tmc.edu)<br>A leading medical city pioneering patient care, research, education, and prevention with a focus on advancing life sciences and innovation | Hospitals and Health Care | 🇺🇸 Houston | 384 | 1945 |
| 37 | [Store No. 8](https://www.tamtam.ai/c/store-no-8) (storeno8.com)<br>An incubation arm of a major retailer, focused on transforming the future of retail through radical innovations in physical, digital, and virtual experiences | Retail | 🇺🇸 Hoboken | 371 |  |
| 38 | [South Park Commons](https://www.tamtam.ai/c/south-park-commons) (southparkcommons.com)<br>Community of technologists and builders helping each other explore and learn, and funding companies emerging from members' explorations. | Venture Capital and Private Equity Principals | 🇺🇸 San Francisco | 357 | 2016 |
| 39 | [PeopleTech Partners](https://www.tamtam.ai/c/peopletech-partners) (peopletechpartners.com)<br>Connects world-class People leaders with technology to scale solutions for forward-thinking companies, providing critical insights and feedback to founders to fuel success. | Technology, Information and Internet | 🇺🇸 San Francisco | 345 | 2016 |
| 40 | [CIC (Cambridge Innovation Center)](https://www.tamtam.ai/c/cic-cambridge-innovation-center) (cic.com)<br>Global leader in driving innovation at scale, managing workspace, labs, and event spaces, with bespoke programming and industry cluster development to advance innovation | Real Estate | 🇺🇸 Cambridge | 345 | 1999 |
| 41 | [Dubai Integrated Economic Zones Authority](https://www.tamtam.ai/c/dubai-integrated-economic-zones-authority) (diez.ae)<br>Specializing in creating a cutting-edge multimedia ecosystem, global networking, and holistic solutions to enhance Dubai's global positioning | Government Administration | 🇺🇸 Dubai | 338 | 2021 |
| 42 | [RA Capital Management](https://www.tamtam.ai/c/ra-capital-management) (racap.com)<br>Investment management firm focusing on healthcare, life sciences, and planetary health companies through evidence-based public and private funding. | Financial Services | 🇺🇸 Boston | 336 | 2004 |
| 43 | [A2SV \| Africa to Silicon Valley](https://www.tamtam.ai/c/a2sv-africa-to-silicon-valley) (a2sv.org)<br>A nonprofit social enterprise upskilling young software engineers, connecting them to top tech internships, and guiding them to create digital solutions for Africa's challenges | Higher Education | 🇺🇸 Palo Alto | 333 | 2019 |
| 44 | [Harvard Innovation Labs](https://www.tamtam.ai/c/harvard-innovation-labs) (innovationlabs.harvard.edu)<br>The company provides a vibrant ecosystem for the Harvard community to explore innovation and entrepreneurship across various disciplines, fostering collaboration and supporting student ventures | Education Administration Programs | 🇺🇸 Allston | 331 | 2011 |
| 45 | [Capital Factory](https://www.tamtam.ai/c/capital-factory) (capitalfactory.com)<br>Central hub for entrepreneurs in Texas, connecting them with resources, investors, employees, mentors, and customers through meetups, classes, and coworking | Venture Capital and Private Equity Principals | 🇺🇸 Austin | 331 | 2009 |
| 46 | [SOSV](https://www.tamtam.ai/c/sosv) (sosv.com)<br>Global venture capital firm specializing in early stage startup development programs focused on deep technology for the betterment of humanity and the planet | Venture Capital and Private Equity Principals | 🇺🇸 Princeton | 321 |  |
| 47 | [SKU](https://www.tamtam.ai/c/sku) (sku.is)<br>Accelerator program for consumer product startups, providing resources, mentorship, education, operations support, and funding for breakout success and market recognition | Manufacturing | 🇺🇸 Austin | 319 | 2011 |
| 48 | [Addo AI](https://www.tamtam.ai/c/addo-ai) (addo.ai)<br>An artificial intelligence advisory and incubator, helping organizations leverage AI to improve services and tackle global challenges for a better world | IT Services and IT Consulting | 🇺🇸 San Francisco | 304 | 2017 |
| 49 | [Western Growers](https://www.tamtam.ai/c/western-growers) (wga.com)<br>Advocate for fruit, vegetable, and tree nut farmers by providing insurance, technology advancement, and regulatory support to ensure viability. | Non-profit Organizations | 🇺🇸 Irvine | 295 | 1926 |
| 50 | [Activate](https://www.tamtam.ai/c/activate-berkeley) (activate.org)<br>Activate empowers scientists through a fellowship program to launch startups addressing global challenges, ensuring their research is brought to market effectively | Non-profit Organizations | 🇺🇸 Berkeley | 284 | 2015 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in the United States

- [The largest companies in the United States](https://www.tamtam.ai/l/largest-companies-united-states) (104,975)
- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,197)
- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Professional services firms in the United States](https://www.tamtam.ai/l/professional-services-firms-united-states) (7,079)
- [Retail chains in the United States](https://www.tamtam.ai/l/retail-chains-united-states) (6,981)
- [Financial services firms in the United States](https://www.tamtam.ai/l/financial-services-firms-united-states) (6,864)
- [Companies with in-house R&D in the United States](https://www.tamtam.ai/l/r-and-d-companies-united-states) (6,796)
- [IT Services and IT Consulting companies in the United States](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-states) (6,694)
- [SaaS companies in the United States](https://www.tamtam.ai/l/saas-companies-united-states) (6,410)
- [IT services companies in the United States](https://www.tamtam.ai/l/it-services-companies-united-states) (5,818)
- [Healthcare providers in the United States](https://www.tamtam.ai/l/healthcare-providers-united-states) (5,810)
- [Critical infrastructure operators in the United States](https://www.tamtam.ai/l/critical-infrastructure-operators-united-states) (5,801)
- [Hospitals and Health Care companies in the United States](https://www.tamtam.ai/l/hospitals-and-health-care-companies-united-states) (5,573)
- [Hardware manufacturers in the United States](https://www.tamtam.ai/l/hardware-companies-united-states) (5,346)
- [Software Development companies in the United States](https://www.tamtam.ai/l/software-development-companies-united-states) (5,311)
- [Financial Services companies in the United States](https://www.tamtam.ai/l/financial-services-companies-united-states) (5,012)
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- [Consulting firms in the United States](https://www.tamtam.ai/l/consulting-firms-united-states) (4,382)
- [AI companies in the United States](https://www.tamtam.ai/l/ai-companies-united-states) (4,246)
- [Public sector organisations in the United States](https://www.tamtam.ai/l/public-sector-organisations-united-states) (4,149)
- [Subscription businesses in the United States](https://www.tamtam.ai/l/subscription-businesses-united-states) (3,923)
- [Real Estate companies in the United States](https://www.tamtam.ai/l/real-estate-companies-united-states) (3,808)
- [Higher Education companies in the United States](https://www.tamtam.ai/l/higher-education-companies-united-states) (3,470)
- [Construction companies in the United States](https://www.tamtam.ai/l/construction-companies-united-states) (3,271)

## The same list elsewhere in United States

- [Startup incubators and accelerators in California](https://www.tamtam.ai/l/incubators-and-accelerators-california) (72)
- [Startup incubators and accelerators in New York State](https://www.tamtam.ai/l/incubators-and-accelerators-new-york-state) (37)
- [Startup incubators and accelerators in New York](https://www.tamtam.ai/l/incubators-and-accelerators-new-york) (29)

## The same list elsewhere

- [Startup incubators and accelerators in the world](https://www.tamtam.ai/l/incubators-and-accelerators-in-the-world) (1,131)

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Source: https://www.tamtam.ai/l/incubators-and-accelerators-united-states