Company lists · Data refreshed September 2026

Top 25 Startup ecosystem platforms based in the United States

RevenueBase identified 1,387 company matches for startup ecosystem platforms associated with the United States as of September 2026 and tracks 23,865 professional contacts across them, including 3,025 with verified work emails. New York is the largest hub.

This list covers company matches for startup ecosystem platforms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built
1,387Companies
23,865Contacts tracked
3,025Verified emails
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The 25 largest startup ecosystem platforms based in the United States

Ranked by team size
Top 25 of 1,387 company matches for startup ecosystem platforms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 2026n/a3,283 contacts →

Exact match

“Y Combinator is the leading startup accelerator for entrepreneurs.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchNew York, NY, United StatesHQ recorded Sep 29, 2026n/a1,803 contacts →

Exact match

“Techstars helps founders scale their startups into world-changing businesses.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchRedmond, WA, United StatesHQ recorded Sep 29, 202610001+1,533 contacts →

Exact match

“Microsoft for Startups is a digital ecosystem removing barriers to building a company with free access to technology, coaching, and support for founders in any stage of…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchNY, United StatesHQ recorded Sep 29, 2026n/a1,480 contacts →

Exact match

“Company is a curated collection of startups, entrepreneurs, and enterprises working towards the realization of impactful ideas, together.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchPalo Alto, CA, United StatesHQ recorded Sep 29, 2026n/a1,246 contacts →

Exact match

“The Founder Institute is the World’s Largest AI-Native Company Builder, where ambitious professionals, solo founders, and first-time entrepreneurs go to turn ideas into funded…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchSunnyvale, CA, United StatesHQ recorded Sep 29, 2026501-1,0001,240 contacts →

Exact match

“Plug and Play is a global innovation platform founded in Silicon Valley in 2006.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchPalo Alto, CA, United StatesHQ recorded Sep 29, 2026n/a483 contacts →

Exact match

“Startup Grind is the leading global startup community dedicated to fostering the growth of early-stage companies.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 202651-200441 contacts →

Exact match

“AngelList builds the infrastructure where capital, creativity, and hard work come together to accelerate the rate of innovation.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchArlington, VA, United StatesHQ recorded Sep 29, 2026n/a274 contacts →

Exact match

“The Global Entrepreneurship Network operates projects and programs in 200 countries aimed at making it easier for anyone, anywhere to start and scale a business.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 2026n/a258 contacts →

Exact match

“Our mission is to help more people start better startups.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchNew York, NY, United StatesHQ recorded Sep 29, 2026n/a231 contacts →

Exact match

“Bridge for Billions is a global social enterprise on a mission to build more inclusive and sustainable economies through early-stage entrepreneurship.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchUnited StatesHQ recorded Sep 29, 2026n/a229 contacts →

Exact match

“F6S helps millions of founders and their companies grow.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchWashington, DC, United StatesHQ recorded Sep 29, 2026n/a219 contacts →

Exact match

“Micromentor is the world's largest online mentoring community, connecting purpose-driven entrepreneurs with experienced business mentors worldwide.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchMadison, WI, United StatesHQ recorded Sep 29, 202651-200180 contacts →

Exact match

“gener8tor fosters innovation ecosystems through its accelerator programs, venture funds, and skills-based workforce initiatives.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchPalo Alto, CA, United StatesHQ recorded Sep 29, 202611-50121 contacts →

Exact match

“Blackbox is a global founder-focused platform.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchBrooklyn, United StatesHQ recorded Sep 29, 202651-200119 contacts →

Exact match

“Newlab is a venture platform for critical technology startups transforming core industrial sectors.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchNY, United StatesHQ recorded Sep 29, 2026n/a114 contacts →

Exact match

“Entrepreneurs Roundtable Accelerator (ERA) is New York City’s leading technology accelerator and early-stage venture capital fund.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchPalo Alto, CA, United StatesHQ recorded Sep 29, 202611-50103 contacts →

Exact match

“The Nasdaq Center is an invaluable and prestigious resource for founders and leaders worldwide.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 2026501-1,000101 contacts →

Exact match

“First Round Capital matches seasoned startup leaders with early-stage operators in a unique mentorship community.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchNashville, TN, United StatesHQ recorded Sep 29, 202611-5098 contacts →

Exact match

“Helping make Nashville the best place to start and grow a business by increasing the likelihood of success for entrepreneurs.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchSan Bruno, CA, United StatesHQ recorded Sep 29, 202611-5092 contacts →

Exact match

“AllBusiness.com is one of the world's largest online resource for small businesses and entrepreneurs, providing essential tools and resources to start, grow, and manage your…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchReno, NV, United StatesHQ recorded Sep 29, 202651-20085 contacts →

Exact match

“Be the leader in your life and make the entrepreneurial leap.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 202651-20081 contacts →

Exact match

“Mind the Bridge is a global open innovation platform that empowers economies through entrepreneurship and innovation.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 202611-5080 contacts →

Exact match

“Founded by Jason Calacanis.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchArlington, VA, United StatesHQ recorded Sep 29, 202611-5078 contacts →

Exact match

“Builders + Backers helps entrepreneurial dreamers become builders who create and grow thriving companies.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 1,387 startup ecosystem platforms based in the United States

See the full list, filter by size, metro and specialty, and access 3,025 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Startup ecosystem platforms based in the United States at a glance

As of Sep 29, 2026
12.7%Verified-email coverage
17.2Average contacts per company
1-10Median size (employees)
10.0%Largest-city concentration · New York
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
980
11-50
298
51-200
66
201-500
25
501-1,000
8
1,001-5,000
3
5,001-10,000
2
10001+
5

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,387 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “startup ecosystem platforms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 3,025 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “startup ecosystem platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many startup ecosystem platforms are there based in the United States?

RevenueBase identified 1,387 company matches for startup ecosystem platforms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Y Combinator tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most startup ecosystem platforms?

New York leads with 139 company records, followed by San Francisco (114) and Los Angeles (37).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,025 professional contacts with verified work emails tracked across these 1,387 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.