Company lists · Data refreshed September 2026

Top 25 Online marketplace platforms based in the United States

RevenueBase identified 1,412 online marketplace platforms headquartered in the United States as of September 2026 and tracks 75,019 professional contacts across them, including 16,205 with verified work emails and 17,794 with mobile numbers. New York is the largest hub.

This list covers online marketplace platforms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
1,412Companies
75,019Contacts tracked
16,205Verified emails
17,794Mobile numbers
Unlock all 1,412 companies Free signup · no credit card · 500 free credits

The 25 largest online marketplace platforms based in the United States

Ranked by team size
Top 25 of 1,412 online marketplace platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names online marketplace platforms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
EBAYIndirect evidence
San Jose, CA, United StatesHQ checked Sep 5, 202610001+20,791

“At eBay, we create pathways to connect millions of sellers and buyers in more than 190 markets around the world.”

Source: company website · checked Sep 5, 2026
2
ETSYPartial evidence
Brooklyn, NY, United StatesHQ checked Sep 5, 20261,001-5,0006,680

“Etsy is the global marketplace for unique and creative goods.”

Source: company website · checked Sep 5, 2026
3
Walmart MarketplacePartial evidence
Bentonville, AR, United StatesHQ checked Sep 5, 20265,001-10,0004,007

“Walmart Marketplace connects you to millions of customers across categories, with the tools, insights, and support to grow with confidence.”

Source: company website · checked Sep 5, 2026
4
AmazonPartial evidence
Seattle, WA, United StatesHQ checked Sep 5, 202610001+3,849

“Amazon.com is an ecommerce platform that sells many product lines, including media (books, movies, music, and software), apparel, baby products, consumer electronics, beauty…”

Source: company website · checked Sep 5, 2026
5
ClickbankIndirect evidence
Boise, ID, United StatesHQ checked Sep 5, 2026n/a3,516

“We're Hiring!”

Source: company website · checked Sep 5, 2026
6
World MarketPartial evidence
Alameda, CA, United StatesHQ checked Sep 5, 20261,001-5,0003,298

“We delight customers with an ever-changing marketplace of unique and beautiful home furnishings, décor, accessories and exceptional gourmet products.”

Source: company website · checked Sep 5, 2026
7
The RealrealStrong evidence
San Francisco, CA, United StatesHQ checked Sep 5, 20261,001-5,0002,462

“The RealReal is the world’s largest online marketplace for authenticated, resale luxury goods.”

Source: company website · checked Sep 5, 2026
8
TEMUIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 2026501-1,0002,427

“Temu is an e-commerce company that connects consumers with millions of merchandise partners, manufacturers and brands with the mission to empower them to live a better life.”

Source: company website · checked Sep 5, 2026
9
EBIXPartial evidence
Johns Creek, GA, United StatesHQ checked Sep 5, 20265,001-10,0001,491

“Ebix operates AI-driven, API-first digital marketplaces that power commerce across multiple industries worldwide.”

Source: company website · checked Sep 5, 2026
10
WhatnotPartial evidence
Los Angeles, United StatesHQ checked Sep 5, 20261,001-5,0001,378

“Whatnot is the largest livestream shopping platform in the US, UK, and Europe.”

Source: company website · checked Sep 5, 2026
11
StockxIndirect evidence
Detroit, MI, United StatesHQ checked Sep 5, 20261,001-5,0001,261

“In a world where consumers increasingly value self-expression and individuality, the market for hard-to-find fashion, collectibles, and electronics has never been hotter.”

Source: company website · checked Sep 5, 2026
12
QuinstreetStrong evidence
Foster City, CA, United StatesHQ checked Sep 5, 2026501-1,0001,035

“Powering Performance Marketplaces In Digital Media QuinStreet is a pioneer in powering decentralized online marketplaces that match searchers and “research and compare” consumers…”

Source: company website · checked Sep 5, 2026
13
SpreetailIndirect evidence
Lincoln, NE, United StatesHQ checked Sep 5, 20261,001-5,000836

“Our mission is to propel brands to increase their ecommerce market share across the globe while improving their operational costs.”

Source: company website · checked Sep 5, 2026
14
ZazzlePartial evidence
Redwood City, CA, United StatesHQ checked Sep 5, 2026201-500828

“Zazzle is a marketplace of custom products created by designers selling their art and makers showcasing their customizable products.”

Source: company website · checked Sep 5, 2026
15
Ebay For BusinessStrong evidence
San Jose, CA, United StatesHQ checked Sep 5, 202610001+744

“eBay is one of the world’s largest online marketplaces, connecting people with the things they need and love virtually anytime, anywhere.”

Source: company website · checked Sep 5, 2026
16
ARTSYStrong evidence
New York, United StatesHQ checked Sep 5, 2026201-500618

“The world’s largest online art marketplace.”

Source: company website · checked Sep 5, 2026
17
RUE Gilt GroupeIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 2026501-1,000607

“Rue Gilt Groupe is a leading off-price e-commerce portfolio company, connecting the next-generation shopper to world-class brands.”

Source: company website · checked Sep 5, 2026
18
Mercari USPartial evidence
Palo Alto, CA, United StatesHQ checked Sep 5, 202651-200591

“Mercari launched in 2013 in Japan, and has since become the largest mobile marketplace in the Japanese market.”

Source: company website · checked Sep 5, 2026
19
Trader InteractivePartial evidence
Virginia Beach, VA, United StatesHQ checked Sep 5, 2026201-500575

“Trader Interactive is the leading provider of online market places and digital marketing products serving the lifestyle vehicles and commercial equipment segments.”

Source: company website · checked Sep 5, 2026
20Blue Ash, OH, United StatesHQ checked Sep 5, 2026201-500378

“Everything But The House (EBTH) is a premier online auction marketplace offering a seamless, fully authenticated experience for buying and selling secondhand goods.”

Source: company website · checked Sep 5, 2026
21
OfferupIndirect evidence
Bellevue, WA, United StatesHQ checked Sep 5, 2026201-500348

“OfferUp is on a mission to unleash the power of local.”

Source: company website · checked Sep 5, 2026
22
AllconnectStrong evidence
Fort Mill, SC, United StatesHQ checked Sep 5, 2026501-1,000324

“Allconnect is a digital marketplace and customer acquisition platform that connects consumers to essential home services, including internet, TV, utilities, and other home…”

Source: company website · checked Sep 5, 2026
23
BonanzaStrong evidence
Seattl, United StatesHQ checked Sep 5, 2026n/a313

“Bonanza.com is a fast-growing online marketplace of over 15 million items where sellers offer everything from Isometric sunglasses to Bieber perfume.”

Source: company website · checked Sep 5, 2026
24
WHOPIndirect evidence
Brooklyn, NY, United StatesHQ checked Sep 5, 202651-200309

“Whop is a financial technology company on a mission to provide the world with sustainable income.”

Source: company website · checked Sep 5, 2026
25
HEROPartial evidence
NY, United StatesHQ checked Sep 5, 202651-200300

“The #1 virtual shopping platform.”

Source: company website · checked Sep 5, 2026

Showing 25 of 1,412 online marketplace platforms based in the United States

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Online marketplace platforms based in the United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 132 HQs
17,794Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
750
11-50
446
51-200
126
201-500
43
501-1,000
11
1,001-5,000
14
5,001-10,000
4
10001+
11

Verified emails by last verification

0–30
15,021
31–60
1,023
61–90
17
90–180
13
180+
131

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among online marketplace platforms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

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
Companies headquartered in the United States whose own description of what they do matches “online marketplace platforms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among online marketplace platforms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 16,205 across the full list. 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 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

How many online marketplace platforms are there based in the United States?

RevenueBase identified 1,412 online marketplace platforms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

EBAY, headquartered in San Jose, tops this list with the largest team on record.

Which city has the most online marketplace platforms?

New York leads with 132 headquartered companies, followed by Los Angeles (56) and Miami (47).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 16,205 verified decision-maker contacts tracked across these 1,412 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,412 online marketplace platforms based in the United States. Start with a free account, no credit card.

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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.