Company lists · Data refreshed September 2026

Top 25 Digital performance marketing agencies based in London, United Kingdom

Name: Digital performance 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 24, 2026 2,521 companies tracked

RevenueBase identified 2,521 digital performance marketing agencies headquartered in London, United Kingdom as of September 2026 and tracks 26,569 professional contacts across them, including 4,427 with verified work emails. London is the largest hub.

This list covers digital performance 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 24, 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 24, 2026 86% judged on-target in blind review

2,521Companies

26,569Contacts tracked

4,427Verified emails

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

Ranked by team size

Top 25 of 2,521 digital performance marketing agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to digital performance 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	Iprospect	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	5,001-10,000	2,366 contacts →
	Partial evidence “iProspect, a dentsu company, is a leading global digital-first media agency.” Source: RevenueBase Database · checked Sep 24, 2026
2	M C Saatchi Performance	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	457 contacts →
	Partial evidence “We are a Global digital media agency specializing in taking a human approach to connecting brands with people across all channels.” Source: RevenueBase Database · checked Sep 24, 2026
3	Brave Bison	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	210 contacts →
	Indirect evidence “A world where complexity is the only constant demands a new breed of company.” Source: RevenueBase Database · checked Sep 24, 2026
4	Kinesso Uk&i	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	194 contacts →
	Strong evidence “KINESSO UK is the award-winning, tech-driven performance marketing agency delivering actionable growth for direct clients and agency partners.” Source: RevenueBase Database · checked Sep 24, 2026
5	ALL Response Media	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	178 contacts →
	Partial evidence “All Response Media is the leading performance media planning and buying agency.” Source: RevenueBase Database · checked Sep 24, 2026
6	BIG Group	Partial evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
7	Investis Digital	Partial evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
8	Incredible Marketeer Ites An ISO 9001 2015 Company	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	201-500	147 contacts →
	Indirect evidence “It ain't over 'til it's over." This quote applies very aptly to the way Incredible Marketeer works and performs.” Source: RevenueBase Database · checked Sep 24, 2026
9	Crimtan	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	130 contacts →
	Indirect evidence “Crimtan was established in 2009 with a clear mission: to be a trusted partner for brands navigating the complex world of programmatic advertising.” Source: RevenueBase Database · checked Sep 24, 2026
10	E Intelligence	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	117 contacts →
	Strong evidence “e intelligence is a renowned global leader in the digital marketing space.” Source: RevenueBase Database · checked Sep 24, 2026
11	FOUND	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	104 contacts →
	Indirect evidence “We're Found, the Everysearch™ agency.” Source: RevenueBase Database · checked Sep 24, 2026
12	TUG Agency	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	97 contacts →
	Strong evidence “Tug is an independent, AI-powered brand and performance marketing agency that helps businesses anticipate change, innovate with confidence and deliver real, incremental growth.” Source: RevenueBase Database · checked Sep 24, 2026
13	Finixio	Partial evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
14	The Media People	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	11-50	83 contacts →
	Indirect evidence “Powered by our people, our campaigns put your audience first.” Source: RevenueBase Database · checked Sep 24, 2026
15	Social Boost	Indirect evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
16	Mediavision	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	11-50	77 contacts →
	Indirect evidence “At MediaVision, we believe there's potential hidden in every search.” Source: RevenueBase Database · checked Sep 24, 2026
17	Mind Digital Group	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	76 contacts →
	Partial evidence “Mind Digital Group is an independent digital company that is focused on servicing global clients and partner agencies.” Source: RevenueBase Database · checked Sep 24, 2026
18	GA Agency	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	70 contacts →
	Strong evidence “GA Agency is an award-winning digital marketing agency helping brands all over the world grow their business and revenue in the online space.” Source: RevenueBase Database · checked Sep 24, 2026
19	Nest Commerce	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	69 contacts →
	Indirect evidence “Nest Commerce is a technology-led agency working with brands like Urban Outfitters, Hims and Damson Madder.” Source: RevenueBase Database · checked Sep 24, 2026
20	Vervaunt	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	68 contacts →
	Partial evidence “Vervaunt is a forward-thinking eCommerce consultancy and marketing agency, collaborating with the most ambitious and pioneering brands in the industry across full funnel…” Source: RevenueBase Database · checked Sep 24, 2026
21	Clicksco	Partial evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	66 contacts →
	Partial evidence “As a new chapter in our Digital Agency begins, we are also a fantastic place to work, with a reputation for discovering and nurturing some of the finest minds in the business…” Source: RevenueBase Database · checked Sep 24, 2026
22	Eureka Digital	Strong evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	65 contacts →
	Strong evidence “Eureka Digital is a multi-award-winning digital marketing agency specializing in healthcare and pharmaceuticals.” Source: RevenueBase Database · checked Sep 24, 2026
23	77agency	Partial evidence	London, United KingdomHQ checked Sep 24, 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 24, 2026
24	ROAST	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	57 contacts →
	Indirect evidence “We are ROAST.” Source: RevenueBase Database · checked Sep 24, 2026
25	OCM Digital Media	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	51-200	54 contacts →
	Indirect evidence “OCM is a leading adtech agency providing solutions to advertisers, advertising agencies and to web, mobile & video publishers.” Source: RevenueBase Database · checked Sep 24, 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: digital performance 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 digital performance marketing agencies.
Partial evidence: Its own public description names part of digital performance marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name digital performance 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 2,521 digital performance marketing agencies based in London, United Kingdom

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Digital performance marketing agencies based in London, United Kingdom at a glance

As of Sep 24, 2026

16.7%Verified-email coverage

10.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

1,651

11-50

708

51-200

127

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,521 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 digital performance 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 “digital performance 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 digital performance 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 digital performance 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, 4,427 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 24, 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.

Digital performance 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 digital performance 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 digital performance marketing agencies are there based in London, United Kingdom?

RevenueBase identified 2,521 digital performance 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?

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

Which city has the most digital performance marketing agencies?

London leads with 2521 headquartered companies, followed by Manchester (320) and Birmingham (193).

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 4,427 verified decision-maker contacts tracked across these 2,521 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 24, 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.