Company lists · Data refreshed October 2026

Top 25 Marketing audit services based in London, United Kingdom

RevenueBase identified 109 company matches for marketing audit services associated with London, United Kingdom as of October 2026 and tracks 415 professional contacts across them, including 167 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for marketing audit services associated with London, 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 October 19, 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 Oct 19, 2026 How this list was built
109Companies
415Contacts tracked
167Verified emails
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The 25 largest marketing audit services based in London, United Kingdom

Ranked by team size
Top 25 of 109 company matches for marketing audit services based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 19, 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 matchLondon, United KingdomHQ recorded Oct 19, 202611-5054 contacts →

Exact match

“FirmDecisions, member of the Ebiquity Group Plc, is the largest independent global marketing auditor.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-5041 contacts →

Exact match

“We’re strategists, analysts and creatives obsessed with building category leading brands.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-5019 contacts →

Exact match

“We Live Context are a marketing and research team that inspires business and consumer brands around the world to make the best decisions and maximise their Return on Intelligence.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-5017 contacts →

Exact match

“RedRoute is a Marketing Effectiveness Agency.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-1013 contacts →

Exact match

“Rigorous.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-5012 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 · Oct 19, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-5012 contacts →

Exact match

“Today more than ever marketers need to drive greater efficiencies and demonstrate both tangible improvements in Marketing RoI, and a strategic contribution to business growth.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-1011 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 · Oct 19, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-107 contacts →

Exact match

“Kanso is a leading marketing effectiveness consultancy.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-107 contacts →

Exact match

“We help you establish a complete view of all marketing impact, not just what’s easiest to measure.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-105 contacts →

Exact match

“We specialise in market research and marketing analysis that is insightful and which provides robust evidence to inform marketing decisions.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-105 contacts →

Exact match

“Our focus is on you.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-104 contacts →

Exact match

“Analysi is an exciting new, independent consultancy specialising in marketing analysis that will help your business grow and evolve and ultimately make your marketing better.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-104 contacts →

Exact match

“Agency Insight has been advising the leading brands of the world for 25 years on how to get the most out of their marketing resources, from finding agencies to enhancing agency…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-104 contacts →

Exact match

“At DAYA Marketing, we understand the complexity involved in devising and executing an exceptional marketing strategy.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-103 contacts →

Exact match

“Measurable Marketing Consultancy is dedicated to helping businesses turn their marketing from a cost centre to a profit centre, effectively monetising their marketing.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-103 contacts →

Exact match

“Whether you need to strengthen your brand, develop compelling strategies to enhance your ROI, improve cooperation between the sales team and marketing department, inject knowledge…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-103 contacts →

Exact match

“We deliver commercially-focused marketing consultancy.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-103 contacts →

Exact match

“Brand and marketing strategies for brands who want to unlock a new phase of growth.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-103 contacts →

Exact match

“RBO Consulting is a specialist branding, digital consulting, website development and marketing communications business.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Oct 19, 20261-103 contacts →

Exact match

“Carter Consulting is a brand marketing agency dedicated to empowering businesses to drive positive change for the environment and society through marketing excellence.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Oct 19, 202651-2002 contacts →

Exact match

“We're proud to announce that Team6ix is now a ICP company.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-502 contacts →

Exact match

“Crater Lake provides our clients with clear, actionable answers to the questions they have around their toughest marketing decisions, regardless of the scale and the complexity of…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-502 contacts →

Exact match

“N77 is a full-service marketing and creative agency that has a formally trained art team possesses a profound understanding of business processes and is proud of its research…”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Oct 19, 202611-502 contacts →

Exact match

“We make organisations' marketing more effective.”

Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase

Showing 25 of 109 marketing audit services based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 167 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Marketing audit services based in London, United Kingdom at a glance

As of Oct 19, 2026
40.2%Verified-email coverage
3.8Average contacts per company
1-10Median size (employees)
Oct 19, 2026Page data refreshed

Companies by employee count

1-10
87
11-50
18
51-200
4

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 109 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 London, United Kingdom whose business descriptions match “marketing audit services” 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 167 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 October 19, 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.

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 “marketing audit services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many marketing audit services are there based in London, United Kingdom?

RevenueBase identified 109 company matches for marketing audit services associated with London, United Kingdom as of October 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?

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

Which city in the United Kingdom has the most marketing audit services?

London leads the United Kingdom with 109 company records, followed by Birmingham (8) and Manchester (8).

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 167 professional contacts with verified work emails tracked across these 109 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 October 19, 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.