Company lists · Data refreshed November 2026

Top 22 Marketing optimization agencies based in the United Kingdom

Name: Marketing optimization agencies 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 8,051 companies tracked

RevenueBase identified 8,051 company matches for marketing optimization agencies associated with the United Kingdom as of November 2026 and tracks 83,795 professional contacts across them, including 23,033 with verified work emails. London is the largest hub.

This list covers company matches for marketing optimization agencies 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

8,051Companies

83,795Contacts tracked

23,033Verified emails

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The 22 largest marketing optimization agencies based in the United Kingdom

Ranked by team size

Top 22 of 8,051 company matches for marketing optimization agencies 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	Exact match	London, United KingdomHQ recorded Nov 6, 2026	10001+	16,459 contacts →
	Exact match “Kantar is the world’s leading marketing data and analytics business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Essencemediacom	Exact match	London, United KingdomHQ recorded Nov 6, 2026	10001+	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
3	Marketizon	Exact match	London, United KingdomHQ recorded Nov 6, 2026	n/a	1,989 contacts →
	Exact match “Marketizon is the leader in developing innovative, multi-channel marketing technologies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Linney	Exact match	Mansfield, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	689 contacts →
	Exact match “We’re Linney, a connected marketing partner helping brands turn complexity into clarity across digital, physical and ecommerce channels.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Fifty-Five	Exact match	Paris, United KingdomHQ recorded Nov 6, 2026	201-500	473 contacts →
	Exact match “fifty-five was founded in 2010 by former Google executives who understood and anticipated the potential of data in brands’ marketing strategies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	MVF	Exact match	London, United KingdomHQ recorded Nov 6, 2026	201-500	428 contacts →
	Exact match “MVF powers growth for our clients by connecting them to potential customers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Promodo Digital Agency	Exact match	Lincoln, United KingdomHQ recorded Nov 6, 2026	201-500	375 contacts →
	Exact match “Promodo is an award-winning performance marketing agency and a reliable partner for driving measurable results in eCommerce.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Intelling LTD	Exact match	Manchester, United KingdomHQ recorded Nov 6, 2026	501-1,000	368 contacts →
	Exact match “A dedicated team of outsource experts committed to delivering growth for our partners through the power of communication A marketing operation that can provide an integrated data…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Merkle Emea	Exact match	London, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	344 contacts →
	Exact match “Merkle, a dentsu company, powers the experience economy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	ADD People	Exact match	Altrincham, United KingdomHQ recorded Nov 6, 2026	201-500	309 contacts →
	Exact match “We’re Add People, a team of digital marketing professionals dedicated to helping small to medium-sized businesses grow online.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	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
12	Jaywing	Exact match	Leeds, United KingdomHQ recorded Nov 6, 2026	501-1,000	242 contacts →
	Exact match “Jaywing Part of the Stubben Edge Group We’re an award-winning creative, media and data agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Eskimoz	Exact match	London, United KingdomHQ recorded Nov 6, 2026	201-500	240 contacts →
	Exact match “Eskimoz is an international digital acquisition agency that helps businesses optimise their revenue and boost their growth through digital channels such as GEO, SEO, Paid Search…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	OUTRA	Exact match	London, United KingdomHQ recorded Nov 6, 2026	n/a	239 contacts →
	Exact match “Outra provides the audience data that household names like Sky, Shell, Zoopla and AXA rely on to power their campaigns.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	GO Inspire Group	Exact match	Leicester, United KingdomHQ recorded Nov 6, 2026	201-500	227 contacts →
	Exact match “Welcome to Go Inspire - Your Marketing Performance Partner!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	ALL Response Media	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	186 contacts →
	Exact match “All Response Media is the leading performance media planning and buying agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Impression	Exact match	Nottingham, United KingdomHQ recorded Nov 6, 2026	51-200	186 contacts →
	Exact match “We're a performance marketing agency setting the new standard of excellence through our people, our performance and our technology, with offices in Manchester, Nottingham, London…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Kinesso Uk&i	Exact match	London, United KingdomHQ recorded Nov 6, 2026	501-1,000	183 contacts →
	Exact match “KINESSO UK is the award-winning, tech-driven performance marketing agency delivering actionable growth for direct clients and agency partners.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	PDV LTD	Exact match	Watford, United KingdomHQ recorded Nov 6, 2026	n/a	164 contacts →
	Exact match “We’re passionate about making data work.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Ics-Digital	Exact match	Leeds, United KingdomHQ recorded Nov 6, 2026	51-200	163 contacts →
	Exact match “ICS-digital is a global SEO, content, advertising, translation & digital PR agency working in over 100 languages, across over 90 markets in the most highly regulated and highly…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Connective3	Exact match	Leeds, United KingdomHQ recorded Nov 6, 2026	51-200	156 contacts →
	Exact match “We are a specialist performance marketing agency, and we deliver unrivalled performance for our clients on a global scale.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Space & Time	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	151 contacts →
	Exact match “At Space & Time, we’re creating a shift in growth marketing.” 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 “marketing optimization agencies”. 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 22 of 8,051 marketing optimization agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 23,033 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Marketing optimization agencies based in the United Kingdom at a glance

As of Nov 6, 2026

27.5%Verified-email coverage

10.4Average contacts per company

1-10Median size (employees)

32.8%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

5,953

11-50

1,739

51-200

255

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 8,051 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 “marketing optimization 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. 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 23,033 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.

Marketing optimization agencies by metro

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

How many marketing optimization agencies are there based in the United Kingdom?

RevenueBase identified 8,051 company matches for marketing optimization agencies 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 tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most marketing optimization agencies?

London leads with 2644 company records, followed by Manchester (349) and Birmingham (183).

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 23,033 professional contacts with verified work emails tracked across these 8,051 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.