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Company lists · Data refreshed November 2026

Top 25 Ad companies worldwide

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 101,395 companies tracked

RevenueBase identified 101,395 company matches for ad companies worldwide as of November 2026 and tracks 855,064 professional contacts across them, including 170,541 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for ad companies 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 November 6, 2026. Country and city lists for ad companies 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 Nov 6, 2026 How this list was built
101,395Companies
855,064Contacts tracked
170,541Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest ad companies worldwide

Ranked by team size
Top 25 of 101,395 company matches for ad companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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
1
Publicis Media
Exact matchLondon, United KingdomHQ recorded Nov 6, 202610001+7,259 contacts →

Exact match

“Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2
IPG Mediabrands
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202610001+4,396 contacts →

Exact match

“IPG Mediabrands is the media and marketing solutions division of Interpublic Group (NYSE: IPG).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3
PHD
Exact matchBankside, United KingdomHQ recorded Nov 6, 20261,001-5,0004,197 contacts →

Exact match

“Welcome to PHD.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4
Thompson
Exact matchNew York, United StatesHQ recorded Nov 6, 20265,001-10,0003,822 contacts →

Exact match

“J.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5
Mediacom
Exact matchLondon, NY, United KingdomHQ recorded Nov 6, 20265,001-10,0003,500 contacts →

Exact match

“Hello.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6
OTHER
Exact matchToronto, FL, CanadaHQ recorded Nov 6, 2026n/a3,078 contacts →

Exact match

“Other.™ is a modern integrated media agency built for marketers who need more from their agency partner.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7
Spark Foundry
Exact matchNY, United StatesHQ recorded Nov 6, 20261,001-5,0003,019 contacts →

Exact match

“As one of the fastest-growing global media agency networks, Spark Foundry is not beholden to legacy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8
Digitas North America
Exact matchBoston, MA, United StatesHQ recorded Nov 6, 20261,001-5,0002,860 contacts →

Exact match

“Digitas is the Networked Experience Agency, built on the vision that we create magnetic experiences that earn the right for brands to exist in human networks.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9
GREY
Exact matchNew York, United StatesHQ recorded Nov 6, 20265,001-10,0002,800 contacts →

Exact match

“Grey’s mission is to create Famously Effective ideas that move people, business, and the world forward-harnessing the power of creativity to solve business problems and deliver…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10
Publicis
Exact matchNew York, United StatesHQ recorded Nov 6, 20261,001-5,0002,785 contacts →

Exact match

“You can either adapt to change, ignore it or lead it.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11
Omnicom
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202610001+2,762 contacts →

Exact match

“Omnicom is the world’s leading marketing and sales company, built for intelligent growth in the next era.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12
Mccann Worldgroup
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202610001+2,664 contacts →

Exact match

“McCann Worldgroup, part of the Interpublic Group (NYSE: IPG), is the irrefutable leader in the business of creativity.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13
Horizon Media
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,0002,506 contacts →

Exact match

“Horizon Media is a leader in driving business-based outcomes for marketers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14
Omnicom Media Group
Exact matchNew York, United StatesHQ recorded Nov 6, 202610001+2,447 contacts →

Exact match

“Omnicom Media Group (OMG), the media services division of Omnicom Group Inc, delivers transformational experiences for consumers, clients, and talent.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15
Marketing Mind
Exact matchNoida, IndiaHQ recorded Nov 6, 2026n/a2,082 contacts →

Exact match

“The good, bad and ugly of advertising!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16
Marketizon
Exact matchLondon, United KingdomHQ recorded Nov 6, 2026n/a1,989 contacts →

Exact match

“Marketizon is the leader in developing innovative, multi-channel marketing technologies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17
Heaven Hopscotch Groupe
Exact matchParis, FranceHQ recorded Nov 6, 2026n/a1,669 contacts →

Exact match

“Heaven est une agence de publicité next-generation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18
Bbdo Worldwide
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20265,001-10,0001,655 contacts →

Exact match

“Do Big Things”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19
Schbang
Exact matchMumbai, IndiaHQ recorded Nov 6, 20261,001-5,0001,606 contacts →

Exact match

“Schbang is a Creative, Media & Technology Transformation Company founded in 2015 by Harshil Karia & , Sohil Karia.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20
Vaynermedia
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,0001,509 contacts →

Exact match

“VaynerMedia is a contemporary global creative and media agency with an expertise in driving relevance for clients and delivering impactful business results.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21
Tbwa Worldwide
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202610001+1,337 contacts →

Exact match

“TBWA is The Disruption Company®.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22
TBC
Exact matchBaltimore, MD, United StatesHQ recorded Nov 6, 2026n/a1,328 contacts →

Exact match

“TBC is an independently owned, full-service branding, advertising and strategic communications agency with headquarters in Baltimore, Maryland, USA.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23
Hakuhodo INC
Exact matchMinato-ku, United StatesHQ recorded Nov 6, 20261,001-5,0001,310 contacts →

Exact match

“Founded in 1895, Hakuhodo Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24
Tinuiti
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,0001,260 contacts →

Exact match

“Tinuiti is a media agency that not only builds brands, but architects business outcomes.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25
Mediaocean
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,0001,111 contacts →

Exact match

“Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 101,395 ad companies worldwide

See the full list, filter by size, metro and specialty, and access 170,541 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Ad companies worldwide at a glance

As of Nov 6, 2026
19.9%Verified-email coverage
8.4Average contacts per company
1-10Median size (employees)
1.5%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
63,913
11-50
30,223
51-200
5,011
201-500
1,140
501-1,000
264
1,001-5,000
160
5,001-10,000
54
10001+
112

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 ad companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “ad 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. 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 170,541 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 November 6, 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.

Ad companies by location

391 lists · largest first

Every Ad companies 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 “ad companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many ad companies are there worldwide?

RevenueBase identified 101,395 company matches for ad companies worldwide as of November 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?

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

Which country has the most ad companies?

The United States leads with 16,960 companies, followed by India (11,261) and Brazil (4,855). Every ad companies list by country and city is linked on this page.

Which city has the most ad companies?

London leads with 1500 company records, followed by Mumbai (1095) and Sao Paulo (1080).

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 170,541 professional contacts with verified work emails tracked across these 101,395 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 November 6, 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.

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