Company lists · Data refreshed September 2026

Top 25 Professional services pr firms based in the United Kingdom

Name: Professional services pr firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,287 companies tracked

RevenueBase identified 1,287 professional services pr firms headquartered in the United Kingdom as of September 2026 and tracks 8,838 professional contacts across them, including 2,983 with verified work emails. London is the largest hub.

This list covers professional services pr firms headquartered in the 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

1,287Companies

8,838Contacts tracked

2,983Verified emails

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The 25 largest professional services pr firms based in the United Kingdom

Ranked by team size

Top 25 of 1,287 professional services pr firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to professional services pr firms: 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	CDR Citigate Dewe Rogerson	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	190 contacts →
	Indirect evidence “CDR is a leading global strategic communications consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
3	The Romans	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	187 contacts →
	Partial evidence “We’re bored of boring PR.” Source: RevenueBase Database · checked Sep 21, 2026
4	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
5	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
6	Camron	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	74 contacts →
	Partial 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
7	Different PR	Partial evidence	Harrogate, United KingdomHQ checked Sep 21, 2026	n/a	71 contacts →
	Partial evidence “We are a Yorkshire PR company that specialises in getting our clients and their products in the news via public relations and media relations campaigns, stunts and one off news…” Source: RevenueBase Database · checked Sep 21, 2026
8	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
9	Purplex	Partial evidence	London And Bristol, United KingdomHQ checked Sep 21, 2026	51-200	52 contacts →
	Partial evidence “Purplex is an award winning PR, digital marketing and creative agency with clients in the UK and across the globe.” Source: RevenueBase Database · checked Sep 21, 2026
10	H Advisors Maitland	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	51 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
11	Camarco	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	49 contacts →
	Indirect evidence “We provide financial and corporate communications advice to help our clients succeed.” Source: RevenueBase Database · checked Sep 21, 2026
12	Rooster	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	43 contacts →
	Partial evidence “Rooster is an award-winning independent PR & communications agency with a focus on innovative storytelling, performance and accountability.” Source: RevenueBase Database · checked Sep 21, 2026
13	Speed Communications	Partial evidence	Bristol, United KingdomHQ checked Sep 21, 2026	51-200	42 contacts →
	Partial evidence “PR has never been more valuable.” Source: RevenueBase Database · checked Sep 21, 2026
14	Whiteoaks International	Partial evidence	Hook, United KingdomHQ checked Sep 21, 2026	11-50	41 contacts →
	Partial evidence “On a mission to be the UK’s most accountable PR agency, Whiteoaks embrace a deliberately different approach.” Source: RevenueBase Database · checked Sep 21, 2026
15	Storm Communications	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	41 contacts →
	Indirect evidence “Drop us a line at hello@stormcom.co.uk to sign up to our Consumer Brands or Corporate newsletter** Storm is a hardworking, down-to-earth, friendly and results-driven agency.” Source: RevenueBase Database · checked Sep 21, 2026
16	Greenbrook	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	40 contacts →
	Indirect evidence “Greenbrook is an independent strategic communications firm that advises clients on all aspects of their business through the lens of reputation.” Source: RevenueBase Database · checked Sep 21, 2026
17	Drofa Comms	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	39 contacts →
	Partial evidence “Drofa Comms is a global PR consulting agency proudly representing the leading finance and fintech firms.” Source: RevenueBase Database · checked Sep 21, 2026
18	Media House	Partial evidence	Angel, United KingdomHQ checked Sep 21, 2026	n/a	38 contacts →
	Partial evidence “Award-Winning Communications Specialists PR \| Marketing \| Events \| Digital \| Talent hello@mediahouseglobal.com” Source: RevenueBase Database · checked Sep 21, 2026
19	Prohibition PR	Partial evidence	Leeds, United KingdomHQ checked Sep 21, 2026	11-50	37 contacts →
	Partial evidence “Prohibition PR is a specialist PR agency which advises businesses of all sizes on how to use public relations and social media effectively.” Source: RevenueBase Database · checked Sep 21, 2026
20	Firstlight	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	36 contacts →
	Partial evidence “firstlight group is an independent corporate and B2B communications consultancy, ranked among PR Week UK's top 25 corporate agencies for 2025.” Source: RevenueBase Database · checked Sep 21, 2026
21	FOX Communications	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	35 contacts →
	Indirect evidence “At Fox Communications, our best practice merges solid thinking with an adaptability that reflects an ever-changing digital landscape.” Source: RevenueBase Database · checked Sep 21, 2026
22	Rostrum	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	34 contacts →
	Partial evidence “Rostrum is a leading London PR agency.” Source: RevenueBase Database · checked Sep 21, 2026
23	Cardew Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	34 contacts →
	Indirect evidence “For more than three decades the team at Cardew has worked with major companies and business leaders to communicate effectively with the media, the international financial…” Source: RevenueBase Database · checked Sep 21, 2026
24	Farrant Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	33 contacts →
	Indirect evidence “Farrant Group is a global strategic communications firm.” Source: RevenueBase Database · checked Sep 21, 2026
25	Babel B Corp	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	33 contacts →
	Indirect evidence “For two decades, Babel has been helping global B2B tech brands tell the stories that matter.” 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: professional services pr firms. 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 professional services pr firms.
Partial evidence: Its own public description names part of professional services pr firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional services pr firms. 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 1,287 professional services pr firms based in the United Kingdom

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Professional services pr firms based in the United Kingdom at a glance

As of Sep 21, 2026

33.8%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

40.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,032

11-50

222

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,287 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 professional services pr firms, 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 the United Kingdom whose own description of what they do matches “professional services pr firms”. 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 professional services pr firms), 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 professional services pr firms, and records with no verified work email. Companies headquartered outside United Kingdom 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, 2,983 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.

Professional services pr firms by metro

Professional services pr firms in London526
Professional services pr firms in Manchester31

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 professional services pr firms, 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 professional services pr firms are there based in the United Kingdom?

RevenueBase identified 1,287 professional services pr firms headquartered in the 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 professional services pr firms?

London leads with 526 headquartered companies, followed by Manchester (31) and Leeds (22).

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 2,983 verified decision-maker contacts tracked across these 1,287 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.