Company lists · Data refreshed September 2026

Top 25 Aor agencies based in London, United Kingdom

Name: Aor 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 21, 2026 1,009 companies tracked

RevenueBase identified 1,009 aor agencies headquartered in London, United Kingdom as of September 2026 and tracks 17,554 professional contacts across them, including 4,126 with verified work emails. London is the largest hub.

This list covers aor 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 21, 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 21, 2026 86% judged on-target in blind review

1,009Companies

17,554Contacts tracked

4,126Verified emails

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The 25 largest aor agencies based in London, United Kingdom

Ranked by team size

Top 25 of 1,009 aor agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to aor 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	Purple	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	449 contacts →
	Indirect evidence “Purple is independent in philosophy, attitude and operation –offering a boutique in-house approach, the strategic requirements of each client are individually tailored from the…” Source: RevenueBase Database · checked Sep 21, 2026
2	Four Agency Worldwide	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	292 contacts →
	Indirect evidence “Four is one of the leading independent integrated communications agencies in the UK and the Middle East.” Source: RevenueBase Database · checked Sep 21, 2026
3	Premier	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	272 contacts →
	Indirect evidence “Creative communications for entertainment, arts and culture.” Source: RevenueBase Database · checked Sep 21, 2026
4	Brands2life	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	224 contacts →
	Indirect evidence “We’re an award-winning, founder-led, communications agency based in London, Minneapolis, New York and San Francisco with an extensive global capability.” Source: RevenueBase Database · checked Sep 21, 2026
5	Harvard	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	213 contacts →
	Indirect evidence “Harvard is an award-winning integrated Marketing and PR agency for tech brands big and small, with a full-service offering including: media and analyst relations, marketing…” Source: RevenueBase Database · checked Sep 21, 2026
6	The Romans	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	187 contacts →
	Indirect evidence “We’re bored of boring PR.” Source: RevenueBase Database · checked Sep 21, 2026
7	ART Studio	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	139 contacts →
	Indirect evidence “A communication agency specialising in advertising, public relations, and digital media, Artbees' art studio has been in existence since 2006.” Source: RevenueBase Database · checked Sep 21, 2026
8	Cognito	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	131 contacts →
	Indirect evidence “Cognito is the global communications agency for finance, technology and the climate transition.” Source: RevenueBase Database · checked Sep 21, 2026
9	Camargue	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	111 contacts →
	Indirect evidence “Camargue is an award-winning, employee-owned communications agency.” Source: RevenueBase Database · checked Sep 21, 2026
10	Hope&glory PR	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	97 contacts →
	Indirect evidence “Welcome … to the land of Hope & Glory.” Source: RevenueBase Database · checked Sep 21, 2026
11	Connect Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	89 contacts →
	Indirect evidence “Connect is a communications agency specialising in public affairs and political strategy, corporate communications and reputation management.” Source: RevenueBase Database · checked Sep 21, 2026
12	Halpern	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	83 contacts →
	Indirect evidence “Halpern is an agency powerhouse.” Source: RevenueBase Database · checked Sep 21, 2026
13	PLMR	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	78 contacts →
	Indirect evidence “PLMR delivers Communications with Impact Lobbying and Public Affairs We draw on the experience of former MPs, candidates and advisers, local authority councillors and public…” Source: RevenueBase Database · checked Sep 21, 2026
14	Camron	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	74 contacts →
	Indirect evidence “A global PR, communications and brand strategy consultancy positioning the world’s leading brands at the forefront of modern culture with offices in London, New York, Los Angeles…” Source: RevenueBase Database · checked Sep 21, 2026
15	Modusbpcm	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	74 contacts →
	Indirect evidence “We are a fully integrated fashion, beauty and lifestyle communications agency with an unrivalled combination of experience and expertise.” Source: RevenueBase Database · checked Sep 21, 2026
16	Mission	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	74 contacts →
	Indirect evidence “We are Mission, a brand fame agency.” Source: RevenueBase Database · checked Sep 21, 2026
17	Ccgroup, A Hoffman Agency	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	67 contacts →
	Indirect evidence “CCGroup is part of The Hoffman Agency, serving as its specialist UK B2B technology communications consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
18	Ketchum UK	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	66 contacts →
	Indirect evidence “We are now Golin Ketchum London.” Source: RevenueBase Database · checked Sep 21, 2026
19	Taylor Herring We Make Brands Famous	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	61 contacts →
	Indirect evidence “We're the most awarded agency in the UK winning more PR Week Awards in the last decade than any other agency (fun fact: 26).” Source: RevenueBase Database · checked Sep 21, 2026
20	Tamooz Marketing Communications	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	60 contacts →
	Indirect evidence “OUR PEOPLE Our team brings a powerful blend of strategic minds and creative souls, delivering targeted solutions that capture your audiences’ hearts and heads.” Source: RevenueBase Database · checked Sep 21, 2026
21	Square In The AIR	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	56 contacts →
	Indirect evidence “Square in the Air is an award-winning communications agency for the sports, betting & gaming and financial industries, providing a range of PR, marketing and content services to…” Source: RevenueBase Database · checked Sep 21, 2026
22	Burson Buchanan	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	55 contacts →
	Indirect evidence “For more than four decades, we have helped our clients build, protect, and enhance their reputations, advance their business objectives, and shape the conversations that matter…” Source: RevenueBase Database · checked Sep 21, 2026
23	Prm-Global	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	54 contacts →
	Indirect evidence “We are the strategic acumen of ‘Gen Plus Group’, a dynamic communications agency where strategy meets storytelling.” Source: RevenueBase Database · checked Sep 21, 2026
24	YOU Agency	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	54 contacts →
	Indirect evidence “A few agencies say it.” Source: RevenueBase Database · checked Sep 21, 2026
25	Irvine Partners	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	50 contacts →
	Indirect evidence “We are Irvine Partners Creative Communications.” Source: RevenueBase Database · checked Sep 21, 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: aor 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 aor agencies.
Partial evidence: Its own public description names part of aor agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name aor 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 1,009 aor agencies based in London, United Kingdom

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Aor agencies based in London, United Kingdom at a glance

As of Sep 21, 2026

23.5%Verified-email coverage

17.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

692

11-50

263

51-200

201-500

501-1,000

1,001-5,000

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 1,009 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 aor 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 “aor 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 aor 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 aor 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, 4,126 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 21, 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.

Aor 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 aor 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 aor agencies are there based in London, United Kingdom?

RevenueBase identified 1,009 aor 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?

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

Which city has the most aor agencies?

London leads with 1009 headquartered companies, followed by Manchester (72) and Leeds (37).

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 4,126 verified decision-maker contacts tracked across these 1,009 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 21, 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.