Company lists · Data refreshed September 2026

Top 25 Online marketplace advertising agencies worldwide

Name: Online marketplace advertising agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 7,000 companies tracked

RevenueBase identified 7,000 company matches for online marketplace advertising agencies worldwide as of September 2026 and tracks 76,771 professional contacts across them, including 17,438 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for online marketplace advertising agencies worldwide, 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. Country and city lists for online marketplace advertising agencies follow the table.

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

7,000Companies

76,771Contacts tracked

17,438Verified emails

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The 25 largest online marketplace advertising agencies worldwide

Ranked by team size

Top 25 of 7,000 company matches for online marketplace advertising agencies worldwide, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	The Trade Desk	Exact match	Ventura, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	4,307 contacts →
	Exact match “It's more than just clicks.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	OLX	Exact match	Amsterdam, NetherlandsHQ recorded Sep 29, 2026	1,001-5,000	3,553 contacts →
	Exact match “At OLX, we build leading AI-first marketplace ecosystems, powered by trust and loved by customers.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Adevinta	Exact match	Amsterdam, FranceHQ recorded Sep 29, 2026	5,001-10,000	1,134 contacts →
	Exact match “Adevinta is a leading online classifieds group and champion for sustainable commerce across Europe and beyond.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Quinstreet	Exact match	Foster City, CA, United StatesHQ recorded Sep 29, 2026	501-1,000	1,035 contacts →
	Exact match “Powering Performance Marketplaces In Digital Media QuinStreet is a pioneer in powering decentralized online marketplaces that match searchers and “research and compare” consumers…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Magnite	Exact match	United StatesHQ recorded Sep 29, 2026	501-1,000	910 contacts →
	Exact match “We’re Magnite (NASDAQ: MGNI), the world’s largest independent sell-side advertising company.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Adform	Exact match	Copenhagen, DenmarkHQ recorded Sep 29, 2026	501-1,000	847 contacts →
	Exact match “Adform is the most powerful and safe media buying platform in the world.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Ebay For Business	Exact match	San Jose, CA, United StatesHQ recorded Sep 29, 2026	10001+	744 contacts →
	Exact match “eBay is one of the world’s largest online marketplaces, connecting people with the things they need and love virtually anytime, anywhere.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	SMG Swiss Marketplace Group	Exact match	Zurich, SwitzerlandHQ recorded Sep 29, 2026	501-1,000	543 contacts →
	Exact match “Welcome to SMG Swiss Marketplace Group We are a pioneering network of online marketplaces and a cutting-edge digital company that simplifies people’s lives with innovative…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Dubizzle	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 29, 2026	201-500	512 contacts →
	Exact match “dubizzle is the UAE'S favorite marketplace to buy, sell and find anything.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Quartile	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	201-500	468 contacts →
	Exact match “Quartile, the world's largest retail media optimization platform, is a trusted partner for multichannel e-commerce success.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Kleinanzeigen	Exact match	Berlin, GermanyHQ recorded Sep 29, 2026	201-500	462 contacts →
	Exact match “Kleinanzeigen is a free online classifieds market that brings the joy of sustainable trade to everyone.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Market	Exact match	United StatesHQ recorded Sep 29, 2026	201-500	400 contacts →
	Exact match “Internet Marketing and Product Brokerage” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Emprendedor	Exact match	Coral Gables, FL, United StatesHQ recorded Sep 29, 2026	n/a	394 contacts →
	Exact match “E-commerce - Construye una Marca - Digital Marketing” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	OLX Indonesia	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 29, 2026	1,001-5,000	388 contacts →
	Exact match “OLX, as a subsidiary of Astra Group is the largest online classifieds site in Indonesia, plays a pivotal role in connecting sellers and buyers across a diverse spectrum of…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Localedge	Exact match	Buffalo, NY, United StatesHQ recorded Sep 29, 2026	501-1,000	383 contacts →
	Exact match “LocalEdge, a Hearst Media Services Company, offers a full suite of online advertising products and services for any size business and budget across the country.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Subito	Exact match	Milan, ItalyHQ recorded Sep 29, 2026	201-500	344 contacts →
	Exact match “Subito è l'azienda n.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Finn.No Mulighetenes Marked	Exact match	Oslo, NorwayHQ recorded Sep 29, 2026	201-500	335 contacts →
	Exact match “Nesten alle i Norge prøvd FINN.no Hvert år tilbringer hver nordmann i snitt 30 timer på tjenesten vår, og til sammen surfer brukerne våre gjennom mer enn 15 milliarder sider.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Channable	Exact match	Utrecht, NetherlandsHQ recorded Sep 29, 2026	201-500	272 contacts →
	Exact match “Channable is the Multichannel Platform that empowers eCommerce businesses to quickly and reliably grow on any online channel, achieving quicker time to market, improved…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	IKMAN	Exact match	Colombo, Sri LankaHQ recorded Sep 29, 2026	201-500	271 contacts →
	Exact match “ikman (ඉක්මන්) is derived from the sinhala word "fast" or "quick" and is our signature style of offering exceptional buying/ selling experience to our consumers.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Willhaben	Exact match	Wien, AustriaHQ recorded Sep 29, 2026	201-500	266 contacts →
	Exact match “The willhaben dream team For us, a great workplace means much more than a nice office or a few attractive benefits - even though we have a lot to offer in that regard.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Adsterra	Exact match	Limassol, CyprusHQ recorded Sep 29, 2026	201-500	265 contacts →
	Exact match “Founded in 2013, Adsterra is now a global ad network with a unique Partner Care approach, trusted by 50K+ advertisers and publishers worldwide.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Seller Interactive	Exact match	Markham, ON, CanadaHQ recorded Sep 29, 2026	51-200	252 contacts →
	Exact match “Canada’s #1 leader in the Digital Marketing industry.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	mudah.my	Exact match	Kuala Lumpur, MalaysiaHQ recorded Sep 29, 2026	51-200	248 contacts →
	Exact match “Mudah.my is Malaysia’s leading marketplace that offers a free and convenient platform for people to buy and sell new and preloved goods just with a simple post of an ad.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	TSS Advertising	Exact match	Jeddah, Saudi ArabiaHQ recorded Sep 29, 2026	501-1,000	248 contacts →
	Exact match “Where innovation & simplicity fuse to bring effective offline/online advertising solutions that propel our partners closer to their marketing goals.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Admedia	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 29, 2026	201-500	242 contacts →
	Exact match “AdMedia helps Agencies and Brands meet their KPIs and hit their ROI objectives.” Recorded in the RevenueBase company graph · Sep 29, 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 “online marketplace advertising agencies”. 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 7,000 online marketplace advertising agencies worldwide

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Online marketplace advertising agencies worldwide at a glance

As of Sep 29, 2026

22.7%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

4,198

11-50

2,056

51-200

497

201-500

142

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for online marketplace advertising agencies are linked below.
What qualifies: Company records worldwide whose business descriptions match “online marketplace advertising agencies” 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. 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 17,438 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.

Online marketplace advertising agencies by location

41 lists · largest first

Every Online marketplace advertising agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “online marketplace advertising agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many online marketplace advertising agencies are there worldwide?

RevenueBase identified 7,000 company matches for online marketplace advertising agencies worldwide 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?

The Trade Desk tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most online marketplace advertising agencies?

The United States leads with 1,099 companies, followed by India (645) and the United Kingdom (286). Every online marketplace advertising agencies list by country and city is linked on this page.

Which city has the most online marketplace advertising agencies?

London leads with 142 company records, followed by New York (86) and Sao Paulo (64).

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 17,438 professional contacts with verified work emails tracked across these 7,000 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.