Company lists · Data refreshed November 2026

Top 25 Advertising effectiveness consultants based in the United Kingdom

Name: Advertising effectiveness consultants based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

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

RevenueBase identified 101 company matches for advertising effectiveness consultants associated with the United Kingdom as of November 2026 and tracks 2,552 professional contacts across them, including 883 with verified work emails. London is the largest hub.

This list covers company matches for advertising effectiveness consultants associated with the United Kingdom, 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.

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

101Companies

2,552Contacts tracked

883Verified emails

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The 25 largest advertising effectiveness consultants based in the United Kingdom

Ranked by team size

Top 25 of 101 company matches for advertising effectiveness consultants based in the United Kingdom, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Kantar Media	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,171 contacts →
	Exact match “Kantar Media is now Fifty5Blue.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Mediasense	Exact match	London, United KingdomHQ recorded Nov 6, 2026	201-500	296 contacts →
	Exact match “mediasense is a global, independent advisor that brings the clarity, connection, and confidence modern marketers need to fuel growth.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Cogent	Exact match	Leamington Spa, United KingdomHQ recorded Nov 6, 2026	51-200	138 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
4	WARC	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	125 contacts →
	Exact match “The global authority on marketing effectiveness.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	The Drum Recommends	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	70 contacts →
	Exact match “Powered by client ratings, global awards data, and results from The Drum Awards, The Drum Recommends provides comprehensive research to help you make informed, confident decisions…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	On Device	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	63 contacts →
	Exact match “On Device provides independent Brand Lift measurement to advertisers, planners and publishers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Cream B Corp	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	34 contacts →
	Exact match “Cream is a creative & media agency, delivering stronger advertising returns through distinctiveness.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Thisthat	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	32 contacts →
	Exact match “ThisThat is an Influence Intelligence company helping brands govern and grow influence.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Mustard	Exact match	Manchester, United KingdomHQ recorded Nov 6, 2026	11-50	28 contacts →
	Exact match “Mustard is a research agency built for the real world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Mostly Media	Exact match	Bath, United KingdomHQ recorded Nov 6, 2026	11-50	23 contacts →
	Exact match “Mostly Media is an independent media buying agency based in Bath.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	ROUTE	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Nov 6, 2026	11-50	17 contacts →
	Exact match “Route offers advertisers and communication agencies media solutions to solve client and customer briefs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Brazil Street LTD	Exact match	Stockport, United KingdomHQ recorded Nov 6, 2026	11-50	17 contacts →
	Exact match “Those great advertising campaigns you see in just the right place at just the right time?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Upshot Marketing	Exact match	Brighton, United KingdomHQ recorded Nov 6, 2026	1-10	16 contacts →
	Exact match “A results-driven marketing consultancy based in Brighton.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Auditstar	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “AuditStar is a marketing solutions and media auditing consultancy with global reach.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Redroute International LTD	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “RedRoute is a Marketing Effectiveness Agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Metametrics	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	14 contacts →
	Exact match “Rigorous.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Viewerslogic	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	14 contacts →
	Exact match “ViewersLogic boosts your chances of hitting your business targets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	The Effectiveness Partnership	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	13 contacts →
	Exact match “The Effectiveness Partnership (TEP) helps brands and agencies embed a culture of effectiveness, design effective strategies, align on more effective ways of working, and oversee…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	CRKLR	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	13 contacts →
	Exact match “CRKLR is a new breed of agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Abintus Consulting	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	12 contacts →
	Exact match “Abintus Consulting is a global media consultancy, headquartered in London (UK) and operates across 60+ markets worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Retail Alchemy	Exact match	Bucks, United KingdomHQ recorded Nov 6, 2026	1-10	12 contacts →
	Exact match “Retail Alchemy is a unique marketing effectiveness consultancy specialising in the measurement of return on investment for Shopper Marketing, Field Sales, ATL, Digital and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Independent Marketing Sciences	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	11 contacts →
	Exact match “As a global marketing effectiveness consultancy, we partner with CMOs and marketing teams to discover the insights from data to enable them to make better decisions to drive…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	GRIP	Exact match	Bristol, United KingdomHQ recorded Nov 6, 2026	1-10	9 contacts →
	Exact match “We believe ads shouldn't be boring.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Slik Media	Exact match	Daventry, United KingdomHQ recorded Nov 6, 2026	11-50	9 contacts →
	Exact match “SLiK Media provide tailored media auditing and media consultancy services for some of the UK's top multi-divisional advertisers across a wide range of sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Freedom Media Group	Exact match	Marple, United KingdomHQ recorded Nov 6, 2026	1-10	8 contacts →
	Exact match “We’re Freedom Media group.” Recorded in the RevenueBase company graph · Nov 6, 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 “advertising effectiveness consultants”. 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 101 advertising effectiveness consultants based in the United Kingdom

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Advertising effectiveness consultants based in the United Kingdom at a glance

As of Nov 6, 2026

34.6%Verified-email coverage

25.3Average contacts per company

1-10Median size (employees)

46.5%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 101 companies.

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.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “advertising effectiveness consultants” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 883 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 consultants by metro

Advertising effectiveness consultants in London47

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 consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many advertising effectiveness consultants are there based in the United Kingdom?

RevenueBase identified 101 company matches for advertising effectiveness consultants associated with the United Kingdom 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?

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

Which city has the most advertising effectiveness consultants?

London leads with 47 company records, followed by Manchester (6) and Bath (2).

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 883 professional contacts with verified work emails tracked across these 101 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.