Company lists · Data refreshed September 2026

Top 25 Omnichannel advertising agencies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 31,953 companies tracked

RevenueBase identified 31,953 omnichannel advertising agencies worldwide as of September 2026 and tracks 407,277 professional contacts across them, including 95,344 with verified work emails. The United States is the largest market and London the largest hub.

This list covers omnichannel advertising agencies worldwide, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026. Country and city lists for omnichannel advertising agencies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

31,953Companies

407,277Contacts tracked

95,344Verified emails

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The 25 largest omnichannel advertising agencies worldwide

Ranked by team size

Top 25 of 31,953 omnichannel advertising agencies worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to omnichannel advertising agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	QUAD	Indirect evidence	Sussex, WI, United StatesHQ checked Sep 29, 2026	10001+	9,567 contacts →
	Indirect evidence “Quad (NYSE: QUAD) is a global marketing experience company that helps brands make direct consumer connections, from household to in-store to online.” Source: RevenueBase Database · checked Sep 29, 2026
2	Publicis Media	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	10001+	6,901 contacts →
	Indirect evidence “Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and…” Source: RevenueBase Database · checked Sep 29, 2026
3	IPG Mediabrands	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	10001+	4,963 contacts →
	Indirect evidence “IPG Mediabrands is the media and marketing solutions division of Interpublic Group (NYSE: IPG).” Source: RevenueBase Database · checked Sep 29, 2026
4	The Trade Desk	Indirect evidence	Ventura, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	4,307 contacts →
	Indirect evidence “It's more than just clicks.” Source: RevenueBase Database · checked Sep 29, 2026
5	PHD	Indirect evidence	Bankside, GermanyHQ checked Sep 29, 2026	1,001-5,000	4,068 contacts →
	Indirect evidence “Welcome to PHD.” Source: RevenueBase Database · checked Sep 29, 2026
6	Omnicom Media Group	Indirect evidence	New York, United StatesHQ checked Sep 29, 2026	10001+	3,989 contacts →
	Indirect evidence “Omnicom Media Group (OMG), the media services division of Omnicom Group Inc, delivers transformational experiences for consumers, clients, and talent.” Source: RevenueBase Database · checked Sep 29, 2026
7	Cheil Worldwide	Indirect evidence	Seoul, South KoreaHQ checked Sep 29, 2026	5,001-10,000	2,802 contacts →
	Indirect evidence “Cheil is a global network of marketing partners committed to the business mission of 'Creating Connected Experiences That Matter,' powered by a network of over experts working…” Source: RevenueBase Database · checked Sep 29, 2026
8	OTHER	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 29, 2026	n/a	2,671 contacts →
	Indirect evidence “Other.™ is a modern integrated media agency built for marketers who need more from their agency partner.” Source: RevenueBase Database · checked Sep 29, 2026
9	Digitas North America	Indirect evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,654 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026
10	Horizon Media	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,368 contacts →
	Indirect evidence “Horizon Media is a leader in driving business-based outcomes for marketers.” Source: RevenueBase Database · checked Sep 29, 2026
11	Assembly Global	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,313 contacts →
	Partial evidence “Assembly is a global omnichannel agency built for brands that want a more modern approach to building brands that perform.” Source: RevenueBase Database · checked Sep 29, 2026
12	Marketing Werks	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	n/a	2,182 contacts →
	Partial evidence “Marketing Werks has become Product Connections, a fully integrated engagement agency specializing in omnichannel solutions that build relationships between brands and consumers.” Source: RevenueBase Database · checked Sep 29, 2026
13	TEADS	Strong evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,789 contacts →
	Strong evidence “Teads Holding Co.(“Teads”)(Nasdaq: TEAD) is a leading omnichannel advertising platform focused on driving outcomes for brand and performance advertisers across screens.” Source: RevenueBase Database · checked Sep 29, 2026
14	Omnicom	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	10001+	1,727 contacts →
	Indirect evidence “Omnicom is the world’s leading marketing and sales company, built for intelligent growth in the next era.” Source: RevenueBase Database · checked Sep 29, 2026
15	Schbang	Indirect evidence	Mumbai, IndiaHQ checked Sep 29, 2026	1,001-5,000	1,548 contacts →
	Indirect evidence “Schbang is a Creative, Media & Technology Transformation Company founded in 2015 by Harshil Karia & , Sohil Karia.” Source: RevenueBase Database · checked Sep 29, 2026
16	Valpak	Partial evidence	St Petersburg, FL, RussiaHQ checked Sep 29, 2026	501-1,000	1,376 contacts →
	Partial evidence “Valpak is the leader in American household data, direct marketing and omnichannel media solutions for local and national businesses and brands.” Source: RevenueBase Database · checked Sep 29, 2026
17	Serviceplan Group	Indirect evidence	Munich, GermanyHQ checked Sep 29, 2026	5,001-10,000	1,298 contacts →
	Indirect evidence “Serviceplan Group is the largest independent, partner-led agency group in Europe.” Source: RevenueBase Database · checked Sep 29, 2026
18	TBC	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 29, 2026	n/a	1,255 contacts →
	Partial evidence “TBC is an independently owned, full-service branding, advertising and strategic communications agency with headquarters in Baltimore, Maryland, USA.” Source: RevenueBase Database · checked Sep 29, 2026
19	Tinuiti	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,173 contacts →
	Indirect evidence “Tinuiti is a media agency that not only builds brands, but architects business outcomes.” Source: RevenueBase Database · checked Sep 29, 2026
20	APS Group	Indirect evidence	Stockport, United KingdomHQ checked Sep 29, 2026	501-1,000	1,152 contacts →
	Indirect evidence “We’ve been delivering marketing and communications since 1961.” Source: RevenueBase Database · checked Sep 29, 2026
21	Mediaocean	Strong evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,050 contacts →
	Strong evidence “Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.” Source: RevenueBase Database · checked Sep 29, 2026
22	Madison World	Indirect evidence	Mumbai, IndiaHQ checked Sep 29, 2026	1,001-5,000	963 contacts →
	Indirect evidence “Madison World, for the last 36 years has been helping clients solve their marketing challenges and generate sustainable profits.” Source: RevenueBase Database · checked Sep 29, 2026
23	Dentsu X	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	5,001-10,000	941 contacts →
	Indirect evidence “Welcome to dentsu X.” Source: RevenueBase Database · checked Sep 29, 2026
24	CPM France	Indirect evidence	Neuilly Sur Seine, FranceHQ checked Sep 29, 2026	1,001-5,000	877 contacts →
	Indirect evidence “CPM France associe vente, marketing et expérience client afin d'influencer l'ensemble du parcours client.” Source: RevenueBase Database · checked Sep 29, 2026
25	NP Digital	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	866 contacts →
	Indirect evidence “Neil Patel has been recognized by the Wall Street Journal, Forbes, and the United Nations, to name a few, as one of the most influential and successful marketers and entrepreneurs…” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: omnichannel advertising agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names omnichannel advertising agencies.
Partial evidence: Its own public description names part of omnichannel advertising agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name omnichannel advertising agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 31,953 omnichannel advertising agencies worldwide

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Omnichannel advertising agencies worldwide at a glance

As of Sep 29, 2026

23.4%Verified-email coverage

12.7Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

18,093

11-50

10,712

51-200

2,222

201-500

549

501-1,000

155

1,001-5,000

101

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 omnichannel advertising agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for omnichannel advertising agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “omnichannel advertising agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names omnichannel advertising agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among omnichannel advertising agencies, and records with no verified work email.
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 its RevenueBase Smart Search 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, 95,344 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 29, 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.

Omnichannel advertising agencies by location

167 lists · largest first

Every Omnichannel 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names omnichannel advertising agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many omnichannel advertising agencies are there worldwide?

RevenueBase identified 31,953 omnichannel advertising agencies worldwide 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?

QUAD, headquartered in Sussex, tops this list with the largest team on record.

Which country has the most omnichannel advertising agencies?

The United States leads with 7,560 companies, followed by India (3,123) and the United Kingdom (1,500). Every omnichannel advertising agencies list by country and city is linked on this page.

Which city has the most omnichannel advertising agencies?

London leads with 516 headquartered companies, followed by Mumbai (371) and New York (369).

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 95,344 verified decision-maker contacts tracked across these 31,953 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 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 Smart Search, 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.