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Company lists · Data refreshed November 2026

Top 25 B2B agencies worldwide

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 207,632 companies tracked

RevenueBase identified 207,632 company matches for B2B agencies worldwide as of November 2026 and tracks 1,765,425 professional contacts across them, including 362,100 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for B2B 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 November 6, 2026. Country and city lists for B2B 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 Nov 6, 2026 How this list was built
207,632Companies
1,765,425Contacts tracked
362,100Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest B2B agencies worldwide

Ranked by team size
Top 25 of 207,632 company matches for B2B agencies 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
Indiamart Intermesh Limited
Exact matchNoida, IndiaHQ recorded Nov 6, 20265,001-10,00017,508 contacts →

Exact match

“IndiaMART is India's largest online B2B marketplace, connecting buyers with suppliers across a wide array of industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2
VML
Exact matchNew York, United StatesHQ recorded Nov 6, 202610001+15,708 contacts →

Exact match

“VML is a global creative company that combines brand experience, customer experience, and commerce to create connected brands that drive growth.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3
Selbstständig
Exact matchZurich, SwitzerlandHQ recorded Nov 6, 2026n/a14,781 contacts →

Exact match

“Bei Social Group positionieren wir deine Marke, treiben die Bekanntheit voran und generieren Leads und Umsätze durch qualitativ hochwertige Inhalte.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4
Acosta
Exact matchJacksonville, FL, United StatesHQ recorded Nov 6, 202610001+12,431 contacts →

Exact match

“Acosta brings simplicity to retail sales.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5
QUAD
Exact matchSussex, WI, United StatesHQ recorded Nov 6, 202610001+9,249 contacts →

Exact match

“Quad (NYSE: QUAD) is a global marketing experience company that helps brands make direct consumer connections, from household to in-store to online.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6
Deloitte Digital
Exact matchUsa, CA, FranceHQ recorded Nov 6, 202610001+7,622 contacts →

Exact match

“At Deloitte Digital, we connect brands with the right strategies and tools to create great impact.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7
WPP
Exact matchLondon, FranceHQ recorded Nov 6, 202610001+6,648 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8
HH Global
Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0006,082 contacts →

Exact match

“HH Global is the global leader in tech-enabled creative production and procurement.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9
HIBU
Exact matchCedar Rapids, IA, United StatesHQ recorded Nov 6, 20261,001-5,0004,702 contacts →

Exact match

“Hibu is a leading provider of technology-driven, integrated digital marketing solutions for America’s local businesses, trusted by tens of thousands of local business owners.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10
Zoominfo
Exact matchVancouver, MA, United StatesHQ recorded Nov 6, 20261,001-5,0004,262 contacts →

Exact match

“ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11
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
12
IO
Exact matchHerentals, BelgiumHQ recorded Nov 6, 20261,001-5,0003,790 contacts →

Exact match

“iO is an AI-native partner in marketing and technology, with experts across 12 campuses in Belgium, the Netherlands, Sweden, Denmark and Bulgaria.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13
Xdbs Worldwide
Exact matchDubai, United Arab EmiratesHQ recorded Nov 6, 20261,001-5,0003,609 contacts →

Exact match

“At XDBS, we primarily work with media agencies, publishers and marketing companies looking to leverage marketing automation and digital marketing capacity and capability to…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14
Maritz
Exact matchSt. Louis, MO, United StatesHQ recorded Nov 6, 20261,001-5,0003,542 contacts →

Exact match

“People drive business, and Maritz knows what drives people.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15
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
16
Cheil Worldwide
Exact matchSeoul, South KoreaHQ recorded Nov 6, 20265,001-10,0002,976 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17
Essencemediacom
Exact matchLondon, United KingdomHQ recorded Nov 6, 202610001+2,966 contacts →

Exact match

“We discover the breakthroughs that brands need to win.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18
Mccann
Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202610001+2,939 contacts →

Exact match

“We build enduring brands that move people and markets through the radical creativity of Truth Well Told™.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19
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
20
KKM
Exact matchWoonsocket, RI, United StatesHQ recorded Nov 6, 2026n/a2,859 contacts →

Exact match

“Founded in 1977, KKM is a customer-driven, knowledge and data based sales and service organization.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21
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
22
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
23
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
24
2020 Companies
Exact matchSouthlake, TX, United StatesHQ recorded Nov 6, 202610001+2,643 contacts →

Exact match

“2020 Companies is an award-winning retail sales, merchandising, and experiential marketing agency headquartered in Southlake, TX.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25
Marketstar
Exact matchOgden, United StatesHQ recorded Nov 6, 20261,001-5,0002,619 contacts →

Exact match

“MarketStar is a global B2B sales outsourcing leader with 38+ years of experience driving predictable revenue growth.”

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

Showing 25 of 207,632 B2B agencies worldwide

See the full list, filter by size, metro and specialty, and access 362,100 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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B2B agencies worldwide at a glance

As of Nov 6, 2026
20.5%Verified-email coverage
8.5Average contacts per company
1-10Median size (employees)
2.3%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
140,529
11-50
53,834
51-200
9,438
201-500
2,095
501-1,000
557
1,001-5,000
361
5,001-10,000
69
10001+
142

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 B2B agencies are linked below.
What qualifies
Company records worldwide whose business descriptions match “B2B 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 362,100 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.

B2B agencies by location

745 lists · largest first

Every B2B 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 “B2B agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many B2B agencies are there worldwide?

RevenueBase identified 207,632 company matches for B2B agencies 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?

Indiamart Intermesh Limited tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most B2B agencies?

The United States leads with 44,000 companies, followed by India (16,491) and the United Kingdom (13,421). Every B2B agencies list by country and city is linked on this page.

Which city has the most B2B agencies?

London leads with 4743 company records, followed by Sao Paulo (2795) and New York (2632).

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 362,100 professional contacts with verified work emails tracked across these 207,632 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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