Company lists · Data refreshed October 2026

Top 25 Startup engagement platform companies based in the United States

Name: Startup engagement platform companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 20, 2026 3,317 companies tracked

RevenueBase identified 3,317 company matches for startup engagement platform companies associated with the United States as of October 2026 and tracks 78,884 professional contacts across them, including 9,234 with verified work emails. New York is the largest hub.

This list covers company matches for startup engagement platform companies 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 October 20, 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 Oct 20, 2026 How this list was built

3,317Companies

78,884Contacts tracked

9,234Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest startup engagement platform companies based in the United States

Ranked by team size

Top 25 of 3,317 company matches for startup engagement platform companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 20, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Y Combinator	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	n/a	3,456 contacts →
	Exact match “Y Combinator is the leading startup accelerator for entrepreneurs.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
2	RED Ventures	Exact match	Fort Mill, SC, United StatesHQ recorded Oct 20, 2026	1,001-5,000	2,074 contacts →
	Exact match “Red Ventures is a global portfolio of high-growth companies, and a place where ambitious people come to build, grow, and scale businesses.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
3	Microsoft For Startups	Exact match	Redmond, WA, United StatesHQ recorded Oct 20, 2026	10001+	1,547 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 · Oct 20, 2026 · View company records in RevenueBase
4	Techstars	Exact match	New York, NY, United StatesHQ recorded Oct 20, 2026	n/a	1,506 contacts →
	Exact match “Techstars helps founders scale their startups into world-changing businesses.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
5	Company	Exact match	NY, United StatesHQ recorded Oct 20, 2026	n/a	1,472 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 · Oct 20, 2026 · View company records in RevenueBase
6	ACCEL	Exact match	Palo Alto, CA, United StatesHQ recorded Oct 20, 2026	n/a	1,027 contacts →
	Exact match “Accel is a global venture capital firm that is the first partner to exceptional teams everywhere, from inception through all phases of private company growth.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
7	Andreessen Horowitz	Exact match	Menlo Park, CA, United StatesHQ recorded Oct 20, 2026	201-500	1,008 contacts →
	Exact match “Founded in 2009 by Marc Andreessen and Ben Horowitz, Andreessen Horowitz (known as "a16z") is a venture capital firm that backs bold entrepreneurs building the future through…” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
8	Founder Institute	Exact match	Palo Alto, CA, United StatesHQ recorded Oct 20, 2026	n/a	995 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 · Oct 20, 2026 · View company records in RevenueBase
9	Hustle Fund	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	n/a	661 contacts →
	Exact match “Hustle Fund is a venture capital firm investing in hilariously-early pre-seed founders.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
10	Insight Partners	Exact match	New York, NY, United StatesHQ recorded Oct 20, 2026	201-500	623 contacts →
	Exact match “Insight Partners is a global software investor partnering with high-growth technology, software, and Internet startup and ScaleUp companies that are driving transformative change…” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
11	Lvlup Ventures	Exact match	New York, NY, United StatesHQ recorded Oct 20, 2026	1,001-5,000	564 contacts →
	Exact match “LvlUp Ventures is a global venture capital firm investing in and accelerating early-stage & late-stage startups.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
12	Tailor Brands	Exact match	Nyc, NY, United StatesHQ recorded Oct 20, 2026	51-200	527 contacts →
	Exact match “Tailor Brands is the world’s first AI powered business‑builder platform, dedicated to helping anyone become business owners quickly, affordably, and confidently.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
13	Primary Venture Partners	Exact match	New York, NY, United StatesHQ recorded Oct 20, 2026	51-200	437 contacts →
	Exact match “Primary is the world's largest early stage VC firm, with a billion in assets under management and 50 full time employees.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
14	Startup Grind	Exact match	Palo Alto, CA, United StatesHQ recorded Oct 20, 2026	n/a	431 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 · Oct 20, 2026 · View company records in RevenueBase
15	Angellist	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	51-200	426 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 · Oct 20, 2026 · View company records in RevenueBase
16	Bessemer Venture Partners	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	201-500	411 contacts →
	Exact match “Bessemer Venture Partners helps entrepreneurs lay strong foundations from inception to build long-standing companies.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
17	Alchemist Accelerator	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	n/a	281 contacts →
	Exact match “The Alchemist Accelerator is a venture-backed initiative focused on accelerating the development of seed-stage ventures that monetize from enterprises (not consumers).” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
18	GV Google Ventures	Exact match	San Francisco Bay, CA, United StatesHQ recorded Oct 20, 2026	51-200	273 contacts →
	Exact match “GV supports innovative founders across multiple stages and sectors, from artificial intelligence and life sciences to consumer platforms, enterprise software, and frontier…” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
19	ODF	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	n/a	242 contacts →
	Exact match “Our mission is to help more people start better startups.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
20	NEO	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	n/a	225 contacts →
	Exact match “Neo is a diverse mentorship community, startup accelerator, and VC fund.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
21	DFJ	Exact match	Menlo Park, CA, United StatesHQ recorded Oct 20, 2026	51-200	210 contacts →
	Exact match “DFJ is a venture capital firm that partners with extraordinary entrepreneurs who are changing the world.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
22	Kleiner Perkins	Exact match	Menlo Park, CA, United StatesHQ recorded Oct 20, 2026	n/a	204 contacts →
	Exact match “For five decades, Kleiner Perkins has partnered with intrepid founders to build iconic companies that made history.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
23	Nextgen Venture Partners	Exact match	San Francisco, CA, United StatesHQ recorded Oct 20, 2026	n/a	204 contacts →
	Exact match “NextGen Venture Partners works with over 1,800 Venture Partners to invest $1 million in seed stage companies and $2 million to $10 million in companies with more than $10 million…” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
24	Science	Exact match	Santa Monica, CA, United StatesHQ recorded Oct 20, 2026	51-200	201 contacts →
	Exact match “We fund, develop and advise companies focused on solving the everyday problems of modern living.” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase
25	Instant Systems, INC	Exact match	Fremont, CA, United StatesHQ recorded Oct 20, 2026	51-200	189 contacts →
	Exact match “Venture Builder For The Next Generation Of Disruptive Software Products Accelerate your growth and reduce your risks as we co-invest in building your global team with our unique…” Recorded in the RevenueBase company graph · Oct 20, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “startup engagement platform companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 3,317 startup engagement platform companies based in the United States

See the full list, filter by size, metro and specialty, and access 9,234 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Startup engagement platform companies based in the United States at a glance

As of Oct 20, 2026

11.7%Verified-email coverage

23.8Average contacts per company

1-10Median size (employees)

12.8%Largest-city concentration · New York

Oct 20, 2026Page data refreshed

Companies by employee count

1-10

2,375

11-50

749

51-200

133

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 3,317 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 engagement platform companies” 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 9,234 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 October 20, 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.

Startup engagement platform companies by metro

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 engagement platform companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many startup engagement platform companies are there based in the United States?

RevenueBase identified 3,317 company matches for startup engagement platform companies associated with the United States as of October 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 engagement platform companies?

New York leads with 423 company records, followed by San Francisco (356) and Los Angeles (117).

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 9,234 professional contacts with verified work emails tracked across these 3,317 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 October 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,317 startup engagement platform companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Startup engagement platform companies by geography

Browse the directory

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.