Company lists · Data refreshed November 2026

Top 25 Advertising effectiveness agencies worldwide

RevenueBase identified 2,744 company matches for advertising effectiveness agencies worldwide as of November 2026 and tracks 27,305 professional contacts across them, including 7,448 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for advertising effectiveness 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 advertising effectiveness 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
2,744Companies
27,305Contacts tracked
7,448Verified emails
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The 25 largest advertising effectiveness agencies worldwide

Ranked by team size
Top 25 of 2,744 company matches for advertising effectiveness 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
1Exact matchReston, VA, United StatesHQ recorded Nov 6, 20261,001-5,0001,331 contacts →

Exact match

“Comscore (NASDAQ: SCOR) is a global, trusted partner for planning, transacting and evaluating media across platforms.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0001,171 contacts →

Exact match

“Kantar Media is now Fifty5Blue.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 6, 2026501-1,000651 contacts →

Exact match

“Ebiquity is the independent authority in Marketing Effectiveness.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchMinneapolis, MN, United StatesHQ recorded Nov 6, 2026501-1,000614 contacts →

Exact match

“Ovative Group is an independent, full-funnel media, measurement, and creative firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchNew York, United StatesHQ recorded Nov 6, 202651-200541 contacts →

Exact match

“good apple builds smarter strategies that drive real impact.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchHamburg, GermanyHQ recorded Nov 6, 20261,001-5,000457 contacts →

Exact match

“Jung von Matt is – in terms of awards for both creativity and efficiency – the most successful advertising agency group in German-speaking countries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchBellevue, WA, United StatesHQ recorded Nov 6, 2026201-500392 contacts →

Exact match

“iSpot helps advertisers measure the brand and business impact of TV and streaming advertising, from concept to airing to conversion.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchGlendale, CT, United StatesHQ recorded Nov 6, 2026201-500318 contacts →

Exact match

“DISQO is a leading provider of advertising outcomes intelligence, measuring brand and performance outcomes across every media channel to power data-driven marketing decisions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchChicago, IL, United StatesHQ recorded Nov 6, 2026201-500263 contacts →

Exact match

“With AbelsonTaylor Group, ROI is what you’ll get.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchTel Aviv, IsraelHQ recorded Nov 6, 2026201-500231 contacts →

Exact match

“McCann Tel-Aviv is the leading Israeli ad agency for over 23 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchWest Des Moines, IA, United StatesHQ recorded Nov 6, 202651-200227 contacts →

Exact match

“OnMedia utilizes the most advanced technology for targeted digital and TV advertising.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBerlin, GermanyHQ recorded Nov 6, 2026201-500205 contacts →

Exact match

“At Media Impact, we are the fastest and most creative customer understanding people in Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202610001+199 contacts →

Exact match

“MAGNA is the media intelligence unit within IPG Mediabrands and the driving force behind advertising forecasts, understanding consumer behavior, marketplace insights, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202651-200173 contacts →

Exact match

“EDO, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCentral Jakarta, SingaporeHQ recorded Nov 6, 202651-200168 contacts →

Exact match

“Leverate Group is established since 2017.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchKolkata, IndiaHQ recorded Nov 6, 202651-200160 contacts →

Exact match

“We engineer Revenue for DTC brands Keen on partnering with us?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchMadrid, SpainHQ recorded Nov 6, 202651-200139 contacts →

Exact match

“Manifiesto is an advertising agency based in Barcelona and Madrid and with 10 years of experience in the sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLeamington Spa, United KingdomHQ recorded Nov 6, 202651-200138 contacts →

Exact match

“If nobody notices your advertising, is it even advertising?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchBarranco, PeruHQ recorded Nov 6, 202611-50137 contacts →

Exact match

“Crear.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200128 contacts →

Exact match

“We are an award-winning media planning and buying agency, helping brands cut through the noise with strategic clarity, inventive solutions, and commercial integrity.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchSandton, South AfricaHQ recorded Nov 6, 202651-200127 contacts →

Exact match

“2 Creative Agency in Africa.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchMilan, ItalyHQ recorded Nov 6, 202651-200120 contacts →

Exact match

“The Havas network is a communications industry leader that delivers integrated solutions to leading brands.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchGuatemalaHQ recorded Nov 6, 202651-200103 contacts →

Exact match

“El Taier nace de la comunión de 2 personas, que buscaban la libertad creadora, la innovación, el reconocimiento a la pasión, la sinergia de talentos, la relación más estrecha con…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPasadena, CA, United StatesHQ recorded Nov 6, 202611-50100 contacts →

Exact match

“711 Media is a full service advertising agency that specializes in integrated direct response campaigns.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchSlade Heath, United KingdomHQ recorded Nov 6, 202611-50100 contacts →

Exact match

“We specialise in results-driven marketing.”

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

Showing 25 of 2,744 advertising effectiveness agencies worldwide

See the full list, filter by size, metro and specialty, and access 7,448 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Advertising effectiveness agencies worldwide at a glance

As of Nov 6, 2026
27.3%Verified-email coverage
10.0Average contacts per company
1-10Median size (employees)
2.1%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
1,604
11-50
894
51-200
175
201-500
37
501-1,000
12
1,001-5,000
10
5,001-10,000
1
10001+
3

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 advertising effectiveness agencies are linked below.
What qualifies
Company records worldwide whose business descriptions match “advertising effectiveness 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 7,448 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.

Advertising effectiveness agencies by location

16 lists · largest first

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

How many advertising effectiveness agencies are there worldwide?

RevenueBase identified 2,744 company matches for advertising effectiveness 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?

Comscore, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most advertising effectiveness agencies?

The United States leads with 516 companies, followed by India (202) and the United Kingdom (131). Every advertising effectiveness agencies list by country and city is linked on this page.

Which city has the most advertising effectiveness agencies?

London leads with 58 company records, followed by New York (37) and Mumbai (27).

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 7,448 professional contacts with verified work emails tracked across these 2,744 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.