Company lists · Data refreshed September 2026

Top 25 Healthcare advertising agencies based in London, United Kingdom

Name: Healthcare advertising 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 12, 2026 522 companies tracked

RevenueBase identified 522 company matches for healthcare advertising agencies associated with London, United Kingdom as of September 2026 and tracks 25,896 professional contacts across them, including 3,750 with verified work emails and 2,207 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for healthcare advertising 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 12, 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 12, 2026 How this list was built

522Companies

25,896Contacts tracked

3,750Verified emails

2,207Mobile numbers

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The 25 largest healthcare advertising agencies based in London, United Kingdom

Ranked by team size

Top 25 of 522 company matches for healthcare advertising agencies based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 12, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Clinic	Exact match	London, United KingdomHQ recorded Sep 12, 2026	n/a	5,287 contacts →
	Exact match “Clinic is an independent creative agency.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
2	Mediacom	Exact match	London, United KingdomHQ recorded Sep 12, 2026	5,001-10,000	3,247 contacts →
	Exact match “Hello.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
3	OI	Exact match	London, United KingdomHQ recorded Sep 12, 2026	n/a	1,891 contacts →
	Exact match “We make content more rewarding.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
4	Avalere Health	Exact match	London, United KingdomHQ recorded Sep 12, 2026	1,001-5,000	1,141 contacts →
	Exact match “United by one profound purpose: to reach EVERY PATIENT POSSIBLE.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
5	Lucid Group	Exact match	London, United KingdomHQ recorded Sep 12, 2026	201-500	283 contacts →
	Exact match “Lucid Group: Catalysts for Change In today’s complex healthcare environment, even the most brilliant science can stall, with 70% of healthcare brands not hitting launch…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
6	Langland	Exact match	London, United KingdomHQ recorded Sep 12, 2026	201-500	232 contacts →
	Exact match “Welcome to Langland.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
7	Grey London	Exact match	London, United KingdomHQ recorded Sep 12, 2026	201-500	148 contacts →
	Exact match “We are Grey London.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
8	SPARK	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	134 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
9	AXON	Exact match	London, United KingdomHQ recorded Sep 12, 2026	201-500	123 contacts →
	Exact match “Big agencies deliver scale and diverse expertise.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
10	Don't Panic London Certified B Corp	Exact match	London, United KingdomHQ recorded Sep 12, 2026	11-50	109 contacts →
	Exact match “In the age of the conscious consumer, only the most culturally relevant ideas cut through.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
11	Havas CX Helia	Exact match	London, United KingdomHQ recorded Sep 12, 2026	201-500	107 contacts →
	Exact match “From pigeons to platforms, from news agency to integrated communications services, our story is one of constant reinvention.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
12	Cognite	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	103 contacts →
	Exact match “Your partner for bringing science to life.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
13	Empire Design	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	100 contacts →
	Exact match “Founded in 1996, Empire Design is an award-winning creative agency specialising in film and entertainment.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
14	The PHA Group	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	92 contacts →
	Exact match “PHA is an award-winning earned-first integrated communications agency.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
15	Cherry	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	85 contacts →
	Exact match “Hello, we are Cherry - a full-service healthcare creative agency that grows brands and careers.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
16	Medistrava, An Inizio Company	Exact match	London, United KingdomHQ recorded Sep 12, 2026	201-500	83 contacts →
	Exact match “Specialists in the future of medical communications.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
17	Havas SO	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	82 contacts →
	Exact match “Anchored in our ambition to deliver meaningful solutions that earn impact, Havas SO is built on an earned-first foundation, powered by PR, social, patient engagement, and…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
18	Nexgen Healthcare Communications	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	81 contacts →
	Exact match “NexGen is an independent agency, with offices in the UK and US, known for its award-winning communications programmes that improve the lives of patients receiving our clients'…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
19	Substance Global	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	77 contacts →
	Exact match “Founded in 2003, Substance is an award-winning digital marketing agency.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
20	The River Group	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	71 contacts →
	Exact match “The River Group is an Integrated, full-service agency that drives performance and ROI across the entire user journey.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
21	Clarion Communications	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	69 contacts →
	Exact match “At Clarion Communications, we don't just solve brand problems; we seize opportunities that elevate brands to new heights.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
22	Obsidian	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	67 contacts →
	Exact match “We are Obsidian – a specialist healthcare agency dedicated to medical & scientific communications.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
23	Geronimo	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	65 contacts →
	Exact match “Geronimo is an independent creative agency that believes change is good.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
24	Eureka Digital	Exact match	London, United KingdomHQ recorded Sep 12, 2026	51-200	65 contacts →
	Exact match “Eureka Digital is a multi-award-winning digital marketing agency specializing in healthcare and pharmaceuticals.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
25	Whitewall	Exact match	London, United KingdomHQ recorded Sep 12, 2026	11-50	60 contacts →
	Exact match “Whitewall is a new agency but one built on strong foundations.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “healthcare advertising agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 522 healthcare advertising agencies based in London, United Kingdom

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Healthcare advertising agencies based in London, United Kingdom at a glance

As of Sep 12, 2026

14.5%Verified-email coverage

8.5%Mobile-number coverage

49.6Average contacts per company

1-10Median size (employees)

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

265

11-50

176

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

3,1960–30

52431–60

1761–90

090–180

13180+

Company record updated

Median 80.0d

00–30

5,48531–60

16,62961–90

3,09090–180

692180+

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 “healthcare advertising 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 3,750 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 12, 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.

Healthcare advertising agencies by metro in the United Kingdom

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

How many healthcare advertising agencies are there based in London, United Kingdom?

RevenueBase identified 522 company matches for healthcare advertising 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?

Clinic 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 healthcare advertising agencies?

London leads the United Kingdom with 500 company records, followed by Manchester (50) and Birmingham (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 3,750 professional contacts with verified work emails tracked across these 522 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 12, 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.