Company lists · Data refreshed September 2026

Top 25 B2B online marketing agencies based in the United Kingdom

Name: B2B online marketing agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 6,414 companies tracked

RevenueBase identified 6,414 company matches for B2B online marketing agencies associated with the United Kingdom as of September 2026 and tracks 50,329 professional contacts across them, including 11,397 with verified work emails and 3,226 with mobile numbers. London is the largest hub.

This list covers company matches for B2B online marketing 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 September 23, 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 Sep 23, 2026 How this list was built

6,414Companies

50,329Contacts tracked

11,397Verified emails

3,226Mobile numbers

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The 25 largest B2B online marketing agencies based in the United Kingdom

Ranked by team size

Top 25 of 6,414 company matches for B2B online marketing agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 23, 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	YELL	Exact match	Reading, United KingdomHQ recorded Sep 23, 2026	501-1,000	1,284 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
2	Digitas UK	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	709 contacts →
	Exact match “We are Digitas.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
3	Linney	Exact match	Mansfield, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	649 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 · Sep 23, 2026 · View company records in RevenueBase
4	B2B Marketing	Exact match	London, United KingdomHQ recorded Sep 23, 2026	n/a	453 contacts →
	Exact match “B2B Marketing is a professional community where all B2B marketers can easily communicate with like-minded industry peers.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
5	Qualifa	Exact match	Brighton, United KingdomHQ recorded Sep 23, 2026	51-200	440 contacts →
	Exact match “We are an award winning multilingual lead generation and market research service provider for B2B publishing, marketing, events and tech companies.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
6	MVF	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	401 contacts →
	Exact match “MVF powers growth for our clients by connecting them to potential customers.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
7	ADD People	Exact match	Altrincham, United KingdomHQ recorded Sep 23, 2026	201-500	292 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 · Sep 23, 2026 · View company records in RevenueBase
8	Transmission	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	289 contacts →
	Exact match “We deliver full-service B2B marketing solutions for world-class customer experiences – with an eye always toward the future.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
9	Fabrick	Exact match	Maidstone, United KingdomHQ recorded Sep 23, 2026	n/a	269 contacts →
	Exact match “Fabrick is the 2021 Construction Marketing Awards Agency of the Year, with 40 years’ experience specialising exclusively in the construction and built environment sectors.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
10	Astute.com	Exact match	Bournemouth, United KingdomHQ recorded Sep 23, 2026	201-500	260 contacts →
	Exact match “Welcome to Astute.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
11	GO Inspire Group	Exact match	Leicester, United KingdomHQ recorded Sep 23, 2026	201-500	210 contacts →
	Exact match “Welcome to Go Inspire - Your Marketing Performance Partner!” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
12	Quantum Marketing	Exact match	Reading, United KingdomHQ recorded Sep 23, 2026	51-200	198 contacts →
	Exact match “Quantum Marketing hangs its hat on one simple promise: one agency, one brief, and one measure of success.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
13	Incredible Marketeer Ites An ISO 9001 2015 Company	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	147 contacts →
	Exact match “It ain't over 'til it's over." This quote applies very aptly to the way Incredible Marketeer works and performs.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
14	Publicis PRO	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	139 contacts →
	Exact match “Publicis Pro is the specialist B2B marketing agency within Publicis Groupe, the world's number one marketing holding group.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
15	TBT Marketing	Exact match	Frome, United KingdomHQ recorded Sep 23, 2026	51-200	138 contacts →
	Exact match “The B2B marketing agency built for complex tech sales.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
16	Modern	Exact match	Bristol, United KingdomHQ recorded Sep 23, 2026	11-50	120 contacts →
	Exact match “Modern is an award-winning B2B Marketing Consultancy.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
17	GCL	Exact match	Birmingham, United KingdomHQ recorded Sep 23, 2026	51-200	119 contacts →
	Exact match “GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
18	E Intelligence	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	117 contacts →
	Exact match “e intelligence is a renowned global leader in the digital marketing space.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
19	AIR Marketing	Exact match	Exeter, United KingdomHQ recorded Sep 23, 2026	51-200	116 contacts →
	Exact match “Since 2016, Air Marketing has been the trusted outsourced sales and lead generation agency in the UK for ambitious B2B businesses.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
20	Durhamlane	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Sep 23, 2026	51-200	115 contacts →
	Exact match “More than SDR Outsourcing.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
21	MOI Global	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	111 contacts →
	Exact match “We’re MOI Global – the Not-So-B2B agency.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
22	Finixio	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	96 contacts →
	Exact match “Finixio is UK based remote first Marketing & SEO Agency helping clients all over the world.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
23	Pursuit Marketing	Exact match	Glasgow, United KingdomHQ recorded Sep 23, 2026	51-200	96 contacts →
	Exact match “Pursuit Marketing are Experts in Demand Generation, Telemarketing, Digital Marketing and Creative Design - your 360 Marketing Provider.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
24	FOX Agency	Exact match	London, United KingdomHQ recorded Sep 23, 2026	51-200	95 contacts →
	Exact match “Fox Agency is an integrated agency for global B2B tech brands on a mission: To grow, expand, transform, accelerate, go-to-market, get investment.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
25	Adtrak	Exact match	Nottingham, United KingdomHQ recorded Sep 23, 2026	51-200	94 contacts →
	Exact match “We're a full-service design, marketing and brand agency based in Nottingham.” Recorded in the RevenueBase company graph · Sep 23, 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 “B2B online marketing 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 25 of 6,414 B2B online marketing agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 11,397 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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B2B online marketing agencies based in the United Kingdom at a glance

As of Sep 23, 2026

22.6%Verified-email coverage

6.4%Mobile-number coverage

7.8Average contacts per company

1-10Median size (employees)

30.0%Largest-city concentration · London

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

4,726

11-50

1,413

51-200

208

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.0d

8,6110–30

2,58431–60

13461–90

1290–180

56180+

Company record updated

Median 89.0d

00–30

5,78031–60

23,70661–90

18,10890–180

2,735180+

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 “B2B online marketing 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 11,397 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 September 23, 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.

B2B online marketing 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 “B2B online marketing agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many B2B online marketing agencies are there based in the United Kingdom?

RevenueBase identified 6,414 company matches for B2B online marketing agencies associated with the United Kingdom as of September 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?

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

Which city has the most B2B online marketing agencies?

London leads with 1925 company records, followed by Manchester (258) and Birmingham (162).

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 11,397 professional contacts with verified work emails tracked across these 6,414 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 September 23, 2026.

Ready to reach these companies? Verified emails and direct dials for all 6,414 B2B online marketing agencies based in the United Kingdom. Start with a free account, no credit card.

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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.