Company lists · Data refreshed September 2026

Top 25 Public relations agencies based in London, United Kingdom

RevenueBase identified 800 company matches for public relations agencies associated with London, United Kingdom as of September 2026 and tracks 9,255 professional contacts across them, including 3,645 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for public relations agencies associated with London, 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 5, 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 5, 2026 How this list was built
800Companies
9,255Contacts tracked
3,645Verified emails
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The 25 largest public relations agencies based in London, United Kingdom

Ranked by team size
Top 25 of 800 company matches for public relations agencies based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 5, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200449 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200272 contacts →

Exact match

“Creative communications for entertainment, arts and culture.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200224 contacts →

Exact match

“We’re an award-winning, founder-led, communications agency based in London, Minneapolis, New York and San Francisco with an extensive global capability.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200190 contacts →

Exact match

“CDR is a leading global strategic communications consultancy.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 5, 2026201-500187 contacts →

Exact match

“We’re bored of boring PR.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200176 contacts →

Exact match

“Helping organisations build and protect value in complex and contested environments.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-200111 contacts →

Exact match

“Camargue is an award-winning, employee-owned communications agency.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20097 contacts →

Exact match

“Welcome … to the land of Hope & Glory.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5089 contacts →

Exact match

“Connect is a communications agency specialising in public affairs and political strategy, corporate communications and reputation management.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5083 contacts →

Exact match

“Halpern is an agency powerhouse.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20078 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20074 contacts →

Exact match

“We are Mission, a brand fame agency.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20066 contacts →

Exact match

“We are now Golin Ketchum London.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20061 contacts →

Exact match

“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).”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5057 contacts →

Exact match

“Tavistock is a leading strategic communications consultancy specialising in the corporate, financial and reputation management sectors.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5055 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5054 contacts →

Exact match

“We are the strategic acumen of ‘Gen Plus Group’, a dynamic communications agency where strategy meets storytelling.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20051 contacts →

Exact match

“H/Advisors in the UK brings together the heritage, skills and insight of H/Advisors Maitland and H/Advisors Cicero to support leaders at their most important moments.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 5, 202651-20050 contacts →

Exact match

“We are Irvine Partners Creative Communications.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5049 contacts →

Exact match

“We provide financial and corporate communications advice to help our clients succeed.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5048 contacts →

Exact match

“From concept to delivery, we devise multi channel, strategic campaigns with maximum impact.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5044 contacts →

Exact match

“Ballou is a strategic communications partner to innovative companies.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5043 contacts →

Exact match

“Rooster is an award-winning independent PR & communications agency with a focus on innovative storytelling, performance and accountability.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5043 contacts →

Exact match

“Firefly Communications is a pan-European public relations agency that is shaping reputations by offering PR and digital communications services for firms that thrive on technology.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 5, 202611-5041 contacts →

Exact match

“We’re Mercieca.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase

Showing 25 of 800 public relations agencies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 3,645 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Public relations agencies based in London, United Kingdom at a glance

As of Sep 5, 2026
39.4%Verified-email coverage
11.6Average contacts per company
1-10Median size (employees)
Sep 5, 2026Page data refreshed

Companies by employee count

1-10
545
11-50
211
51-200
31
201-500
7
501-1,000
1
1,001-5,000
1

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 800 companies.

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 London, United Kingdom whose business descriptions match “public relations 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 3,645 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 5, 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.

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

How many public relations agencies are there based in London, United Kingdom?

RevenueBase identified 800 company matches for public relations agencies associated with London, 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?

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

Which city in the United Kingdom has the most public relations agencies?

London leads the United Kingdom with 800 company records, followed by Manchester (53) and Leeds (27).

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 3,645 professional contacts with verified work emails tracked across these 800 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 5, 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 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.