Company lists · Data refreshed September 2026
Top 25 Public relations agencies technology companies based in London, United Kingdom
RevenueBase identified 606 public relations agencies technology companies headquartered in London, United Kingdom as of September 2026 and tracks 5,955 professional contacts across them, including 2,510 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers public relations agencies technology companies 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 29, 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.
The 25 largest public relations agencies technology companies based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 272 contacts → | ||||
Indirect evidence “Creative communications for entertainment, arts and culture.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 213 contacts → | ||||
Indirect evidence “Axicom is the Burson agency for tech brands & brands with a tech story.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 213 contacts → | ||||
Partial 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 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 187 contacts → | ||||
Indirect evidence “We’re bored of boring PR.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 131 contacts → | ||||
Partial evidence “Cognito is the global communications agency for finance, technology and the climate transition.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 95 contacts → | ||||
Indirect evidence “Fox Agency is an integrated agency for global B2B tech brands on a mission: To grow, expand, transform, accelerate, go-to-market, get investment.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 78 contacts → | ||||
Partial 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 67 contacts → | ||||
Partial evidence “CCGroup is part of The Hoffman Agency, serving as its specialist UK B2B technology communications consultancy.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 66 contacts → | ||||
Indirect evidence “We are now Golin Ketchum London.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 57 contacts → | ||||
Indirect evidence “Tavistock is a leading strategic communications consultancy specialising in the corporate, financial and reputation management sectors.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 54 contacts → | ||||
Indirect evidence “Tyto is the only PR and communications agency built to scale high-growth tech companies faster across Europe.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 43 contacts → | ||||
Indirect evidence “Rooster is an award-winning independent PR & communications agency with a focus on innovative storytelling, performance and accountability.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 43 contacts → | ||||
Strong evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 41 contacts → | ||||
Indirect evidence “We’re Mercieca.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 39 contacts → | ||||
Indirect evidence “Drofa Comms is a global PR consulting agency proudly representing the leading finance and fintech firms.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 37 contacts → | ||||
Indirect evidence “DawBell sits at the centre of the UK entertainment industry, providing integrated communications services for some of the biggest music acts, elite athletes, top-tier talent and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 36 contacts → | ||||
Indirect evidence “Diffusion is an independent, global communications agency that exists to bring tomorrow closer.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 36 contacts → | ||||
Indirect 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 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 36 contacts → | ||||
Indirect evidence “YAP Global: Your Angle Presented, Globally.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 35 contacts → | ||||
Indirect evidence “LM-Communications is renowned for its personalised approach and adeptness at delivering meaningful results with a global impact.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 34 contacts → | ||||
Indirect evidence “Rostrum is a leading London PR agency.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: public relations agencies technology companies. 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 public relations agencies technology companies.
- Partial evidence
- Its own public description names part of public relations agencies technology companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name public relations agencies technology companies. 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 606 public relations agencies technology companies based in London, United Kingdom
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Public relations agencies technology companies based in London, United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
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 606 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 public relations agencies technology companies, 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 “public relations agencies technology companies”. 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 public relations agencies technology companies), 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 public relations agencies technology companies, 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, 2,510 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 29, 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.
Public relations agencies technology companies 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 public relations agencies technology companies, 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 public relations agencies technology companies are there based in London, United Kingdom?
RevenueBase identified 606 public relations agencies technology companies 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?
Premier, headquartered in London, tops this list with the largest team on record.
Which city in the United Kingdom has the most public relations agencies technology companies?
London leads the United Kingdom with 606 headquartered companies, followed by Manchester (45) 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 2,510 verified decision-maker contacts tracked across these 606 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 29, 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.
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