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Company lists · Data refreshed September 2026

Top 25 Search marketing agencies based in the United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 9,349 companies tracked

RevenueBase identified 9,349 search marketing agencies headquartered in the United Kingdom as of September 2026 and tracks 64,446 professional contacts across them, including 12,194 with verified work emails and 3,327 with mobile numbers. London is the largest hub.

This list covers search marketing agencies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 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 HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
9,349Companies
64,446Contacts tracked
12,194Verified emails
3,327Mobile numbers
Explore all 9,349 companies → Free signup · no credit card · 500 free credits

The 25 largest search marketing agencies based in the United Kingdom

Ranked by team size
Top 25 of 9,349 search marketing agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names search marketing agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
YELLPartial evidence
Reading, United KingdomHQ checked Sep 6, 2026501-1,0001,284

“Since 1966, we’ve been helping UK businesses grow – from printed ads in the Yellow Pages to powerful, AI-driven digital marketing that delivers real results.”

Source: company website · checked Sep 6, 2026
2
M C Saatchi PerformanceIndirect evidence
London, United KingdomHQ checked Sep 6, 2026201-500457

“We are a Global digital media agency specializing in taking a human approach to connecting brands with people across all channels.”

Source: company website · checked Sep 6, 2026
3
Promodo Digital AgencyPartial evidence
Lincoln, United KingdomHQ checked Sep 6, 2026201-500383

“Promodo is an award-winning performance marketing agency and a reliable partner for driving measurable results in eCommerce.”

Source: company website · checked Sep 6, 2026
4
ADD PeoplePartial evidence
Altrincham, United KingdomHQ checked Sep 6, 2026201-500292

“We’re Add People, a team of digital marketing professionals dedicated to helping small to medium-sized businesses grow online.”

Source: company website · checked Sep 6, 2026
5
ImpressionPartial evidence
Nottingham, United KingdomHQ checked Sep 6, 202651-200182

“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…”

Source: company website · checked Sep 6, 2026
6
BIG GroupIndirect evidence
London, United KingdomHQ checked Sep 6, 202651-200177

“Founded in 1991, with offices in Amsterdam, Bath, Dubai and London our award-winning employee-owned company has consistently ranked as one of the UK's leading independent digital…”

Source: company website · checked Sep 6, 2026
7
Ics-DigitalIndirect evidence
Leeds, United KingdomHQ checked Sep 6, 202651-200168

“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…”

Source: company website · checked Sep 6, 2026
8
Investis DigitalIndirect evidence
London, United KingdomHQ checked Sep 6, 2026501-1,000158

“IDX (formerly Investis Digital) specializes in elevating companies and brands and maximizing technology to build strong, relatable, and authentic connections with their audiences.”

Source: company website · checked Sep 6, 2026
9
Connective3Partial evidence
Leeds, United KingdomHQ checked Sep 6, 202651-200146

“We are a specialist performance marketing agency, and we deliver unrivalled performance for our clients on a global scale.”

Source: company website · checked Sep 6, 2026
10
AdthenaPartial evidence
London, United KingdomHQ checked Sep 6, 202651-200123

“Adthena is the market-leading, AI-driven search intelligence platform that helps enterprise brands and agencies lower paid search costs, protect brand equity and stay ahead of…”

Source: company website · checked Sep 6, 2026
11
E IntelligencePartial evidence
London, United KingdomHQ checked Sep 6, 202651-200117

“e intelligence is a renowned global leader in the digital marketing space.”

Source: company website · checked Sep 6, 2026
12
The Media ImagePartial evidence
London, United KingdomHQ checked Sep 6, 202651-200108

“TMI is an independent global performance marketing agency built for complexity, scale, and growth.”

Source: company website · checked Sep 6, 2026
13
FOUNDIndirect evidence
London, United KingdomHQ checked Sep 6, 202651-200104

“We're Found, the Everysearch™ agency.”

Source: company website · checked Sep 6, 2026
14
InfoserveIndirect evidence
Leeds, United KingdomHQ checked Sep 6, 202651-200103

“Let’s face it, the world has become an increasingly digital place.”

Source: company website · checked Sep 6, 2026
15
The SEO WorksStrong evidence
Sheffield, United KingdomHQ checked Sep 6, 202651-20098

“The SEO Works are an award-winning provider of search marketing, websites and paid social for leading brands and prospering SME’s.”

Source: company website · checked Sep 6, 2026
16
FinixioPartial evidence
London, United KingdomHQ checked Sep 6, 202651-20096

“Finixio is UK based remote first Marketing & SEO Agency helping clients all over the world.”

Source: company website · checked Sep 6, 2026
17
AdtrakPartial evidence
Nottingham, United KingdomHQ checked Sep 6, 202651-20094

“We're a full-service design, marketing and brand agency based in Nottingham.”

Source: company website · checked Sep 6, 2026
18
EmbryoPartial evidence
Manchester, United KingdomHQ checked Sep 6, 202651-20091

“We are a leading independent agency and trusted growth partner for ambitious businesses of all sizes, turning performance marketing into a growth engine.”

Source: company website · checked Sep 6, 2026
19
The Media PeopleIndirect evidence
London, United KingdomHQ checked Sep 6, 202611-5083

“Powered by our people, our campaigns put your audience first.”

Source: company website · checked Sep 6, 2026
20
BrainsoulsIndirect evidence
Birmingham, United KingdomHQ checked Sep 6, 202651-20082
Source: company website · checked Sep 6, 2026
21
Paramount Digital LTDIndirect evidence
St Helens, United KingdomHQ checked Sep 6, 202611-5079

“Simple.”

Source: company website · checked Sep 6, 2026
22
Social BoostIndirect evidence
London, United KingdomHQ checked Sep 6, 202651-20079

“Social Boost has helped to grow more than 25 million real Followers, created content for 100+ brands, and generated over 300k sales leads.”

Source: company website · checked Sep 6, 2026
23
StickyeyesStrong evidence
Leeds, United KingdomHQ checked Sep 6, 2026201-50077

“Search Marketing | Content | Strategy Delivered by passionate people.”

Source: company website · checked Sep 6, 2026
24
MediavisionPartial evidence
London, United KingdomHQ checked Sep 6, 202611-5077

“At MediaVision, we believe there's potential hidden in every search.”

Source: company website · checked Sep 6, 2026
25
Blue FrontierIndirect evidence
Salisbury, United KingdomHQ checked Sep 6, 202651-20076

“Blue Frontier is a UK-based digital growth partner founded in 2005, helping organisations transform, innovate, and grow through integrated expertise in development, digital…”

Source: company website · checked Sep 6, 2026

Showing 25 of 9,349 search marketing agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 12,194 reachable decision-makers.

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Search marketing agencies based in the United Kingdom at a glance

As of Sep 6, 2026
1-10Median size (employees)
LondonLargest hub · 2780 HQs
3,327Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
7,067
11-50
1,945
51-200
253
201-500
37
501-1,000
12
1,001-5,000
5
5,001-10,000
3
10001+
1

Verified emails by last verification

0–30
11,363
31–60
753
61–90
9
90–180
8
180+
61

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among search marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

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
Companies headquartered in the United Kingdom whose own description of what they do matches “search marketing agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among search marketing agencies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 12,194 across the full list. 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 September 6, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Search marketing agencies by metro

Frequently asked

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

RevenueBase identified 9,349 search marketing agencies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

YELL, headquartered in Reading, tops this list with the largest team on record.

Which city has the most search marketing agencies?

London leads with 2780 headquartered companies, followed by Manchester (358) and Birmingham (239).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 12,194 verified decision-maker contacts tracked across these 9,349 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 9,349 search marketing agencies based in the United Kingdom. Start with a free account, no credit card.

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Related lists

Browse: Companies home · All United Kingdom lists · All Search marketing agencies lists · New lists

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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