Company lists · Data refreshed September 2026

Top 25 Federal digital marketing agencies based in London, United Kingdom

Name: Federal digital marketing agencies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 1,225 companies tracked

RevenueBase identified 1,225 federal digital marketing agencies headquartered in London, United Kingdom as of September 2026 and tracks 11,471 professional contacts across them, including 1,145 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers federal digital marketing agencies headquartered in London, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

1,225Companies

11,471Contacts tracked

1,145Verified emails

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The 25 largest federal digital marketing agencies based in London, United Kingdom

Ranked by team size

Top 25 of 1,225 federal digital marketing agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to federal digital marketing agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	BIG Group	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	177 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 30, 2026
2	Investis Digital	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	501-1,000	158 contacts →
	Partial evidence “IDX (formerly Investis Digital) specializes in elevating companies and brands and maximizing technology to build strong, relatable, and authentic connections with their audiences.” Source: RevenueBase Database · checked Sep 30, 2026
3	E Intelligence	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	117 contacts →
	Strong evidence “e intelligence is a renowned global leader in the digital marketing space.” Source: RevenueBase Database · checked Sep 30, 2026
4	Battenhall	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	112 contacts →
	Indirect evidence “Battenhall is an award-winning communications agency for the social media age.” Source: RevenueBase Database · checked Sep 30, 2026
5	FOUND	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	104 contacts →
	Indirect evidence “We're Found, the Everysearch™ agency.” Source: RevenueBase Database · checked Sep 30, 2026
6	Finixio	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	96 contacts →
	Partial evidence “Finixio is UK based remote first Marketing & SEO Agency helping clients all over the world.” Source: RevenueBase Database · checked Sep 30, 2026
7	Social Boost	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	79 contacts →
	Indirect evidence “Social Boost has helped to grow more than 25 million real Followers, created content for 100+ brands, and generated over 300k sales leads.” Source: RevenueBase Database · checked Sep 30, 2026
8	77agency	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	64 contacts →
	Partial evidence “We are an award-winning full-service digital agency, part of Jakala group with 1,800 employees across 16 countries around the world.” Source: RevenueBase Database · checked Sep 30, 2026
9	Stellar Search	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	48 contacts →
	Strong evidence “We're a strategic digital marketing agency specialising in Paid Search, SEO, Google Shopping, Amazon and Social.” Source: RevenueBase Database · checked Sep 30, 2026
10	BAMBU	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	n/a	45 contacts →
	Partial evidence “Bambu is an online marketing and advertising agency based in London, working with startup and growth brands across the UK, Europe and North America, founded by two ex-WPP…” Source: RevenueBase Database · checked Sep 30, 2026
11	Beautiful Digital	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	44 contacts →
	Strong evidence “Beautiful Digital is a full service digital marketing agency.” Source: RevenueBase Database · checked Sep 30, 2026
12	Propeller	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	44 contacts →
	Partial evidence “We’re a digital agency delivering stand-out experiences that generate results.” Source: RevenueBase Database · checked Sep 30, 2026
13	KD WEB	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	44 contacts →
	Partial evidence “KD Web is an award winning internet marketing, web design and creative agency, providing SEO, polished website design, Ecommerce and CMS systems as well as branding and graphic…” Source: RevenueBase Database · checked Sep 30, 2026
14	Kinase	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	39 contacts →
	Strong evidence “Kinase is a leading Digital Marketing Agency providing services to some of the UK’s top companies.” Source: RevenueBase Database · checked Sep 30, 2026
15	Distinctly	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	38 contacts →
	Strong evidence “Distinctly is an independent digital marketing agency with a passion for SEO, paid media, digital PR and content.” Source: RevenueBase Database · checked Sep 30, 2026
16	Cynosure Designs	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	36 contacts →
	Strong evidence “Cynosure Designs is a UK & UAE-based IT and marketing agency providing 360° digital solutions that are experience-driven and results-focused.” Source: RevenueBase Database · checked Sep 30, 2026
17	Haarty Hanks	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	35 contacts →
	Strong evidence “Haarty Hanks is a digital marketing agency comprised of tech nerds, creative designers and innovative strategists that plan and execute exceptional brand communications and web…” Source: RevenueBase Database · checked Sep 30, 2026
18	Bluedot Agency	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	34 contacts →
	Strong evidence “A disruptive, full-service, award-winning digital marketing & advertising agency for contemporary businesses, specialising in performance marketing, content marketing…” Source: RevenueBase Database · checked Sep 30, 2026
19	Bird Marketing	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	33 contacts →
	Strong evidence “Bird UK - bird.co.uk Bird UAE - bird.ae Bird USA - bird.marketing Bird Marketing, an award-winning digital marketing agency, is a beacon of excellence in the digital landscape.” Source: RevenueBase Database · checked Sep 30, 2026
20	Iconic Digital Marketing Consultants LTD	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	30 contacts →
	Strong evidence “Iconic Digital is a leading digital marketing agency based in London, UK.” Source: RevenueBase Database · checked Sep 30, 2026
21	Market Rocket	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	30 contacts →
	Indirect evidence “Headquartered in Knightsbridge, London, Market Rocket is an Amazon SPN Accredited Agency, Amazon EU Agency Partner, Verified Amazon Ads Partner, TikTok Shop Partner, Meta Business…” Source: RevenueBase Database · checked Sep 30, 2026
22	Prominence Marketing Specialists For Recruitment Agencies	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	29 contacts →
	Strong evidence “Prominence was founded out of the desire to help those in the recruitment sector respond to changes in consumer behaviour, namely the shift towards digital marketing and social…” Source: RevenueBase Database · checked Sep 30, 2026
23	KAU Media Group	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	27 contacts →
	Strong evidence “KAU Media Group is a full service media agency that deliver compelling digital marketing solutions.” Source: RevenueBase Database · checked Sep 30, 2026
24	Ceek Marketing	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	26 contacts →
	Strong evidence “CEEK is a strategic digital marketing agency that believes in the power of digital channels to increase revenue by utilising our specialist in-house resources in social media…” Source: RevenueBase Database · checked Sep 30, 2026
25	Webtopia	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	26 contacts →
	Partial evidence “Bespoke digital advertising strategy + creative Mission-driven ecomm brands need a different kind of agency.” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: federal digital marketing agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names federal digital marketing agencies.
Partial evidence: Its own public description names part of federal digital marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal digital marketing agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,225 federal digital marketing agencies based in London, United Kingdom

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Federal digital marketing agencies based in London, United Kingdom at a glance

As of Sep 30, 2026

10.0%Verified-email coverage

9.4Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

823

11-50

338

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,225 companies.

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 federal digital marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “federal digital marketing agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names federal digital marketing agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among federal digital marketing agencies, and records with no verified work email. Companies headquartered outside London 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 its RevenueBase Smart Search 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, 1,145 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 30, 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.

Federal digital marketing agencies by metro in the United Kingdom

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names federal digital marketing agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many federal digital marketing agencies are there based in London, United Kingdom?

RevenueBase identified 1,225 federal digital marketing agencies headquartered in London, 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?

BIG Group, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most federal digital marketing agencies?

London leads the United Kingdom with 1,225 headquartered companies, followed by Manchester (155) and Birmingham (115).

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 1,145 verified decision-maker contacts tracked across these 1,225 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 30, 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 Smart Search, 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.