Company lists · Data refreshed September 2026

Top 22 Healthcare cybersecurity companies based in the United Kingdom

Name: Healthcare cybersecurity companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 115 companies tracked

RevenueBase identified 115 healthcare cybersecurity companies headquartered in the United Kingdom as of September 2026 and tracks 7,483 professional contacts across them, including 3,796 with verified work emails and 1,057 with mobile numbers. London is the largest hub.

This list covers healthcare cybersecurity companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

115Companies

7,483Contacts tracked

3,796Verified emails

1,057Mobile numbers

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The 22 largest healthcare cybersecurity companies based in the United Kingdom

Ranked by team size

Top 22 of 115 healthcare cybersecurity companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names healthcare cybersecurity companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	SophosPartial evidence	Abingdon, United KingdomHQ checked Sep 3, 2026	5,001-10,000	4,963
	“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: company website · checked Sep 3, 2026
2	CyberfortIndirect evidence	Thatcham, United KingdomHQ checked Sep 3, 2026	51-200	160
	“At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Source: company website · checked Sep 3, 2026
3	CybersmartPartial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	83
	“Cybersecurity should be simple.” Source: company website · checked Sep 3, 2026
4	Adarma SecurityIndirect evidence	Edinburgh, United KingdomHQ checked Sep 3, 2026	201-500	52
	“We are Adarma, independent leaders in detection and response services.” Source: company website · checked Sep 3, 2026
5	defense.comIndirect evidence	Stevenage, United KingdomHQ checked Sep 3, 2026	51-200	32
	“Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.” Source: company website · checked Sep 3, 2026
6	PentesecIndirect evidence	Peterborough, United KingdomHQ checked Sep 3, 2026	51-200	24
	“Check Point Partner of the Year 2022 CRN MSSP of the Year 2021 Pentesec has been challenging the status quo in Cyber Security since 2014 when 5 industry veterans decided they were…” Source: company website · checked Sep 3, 2026
7	AMR CybersecurityPartial evidence	Cheltenham, United KingdomHQ checked Sep 3, 2026	11-50	23
	“AMR CyberSecurity delivers next generation cyber security services to assist organisations across a wide variety of sectors in understanding potential threats and effectively…” Source: company website · checked Sep 3, 2026
8	Blue Cube Security LTDIndirect evidence	East Grinstead, United KingdomHQ checked Sep 3, 2026	11-50	23
	“Blue Cube Security is a trusted UK cyber security partner with over 25 years of experience helping organisations stay secure in an increasingly complex digital world.” Source: company website · checked Sep 3, 2026
9	Blackfoot CybersecurityIndirect evidence	Welwyn Garden City, United KingdomHQ checked Sep 3, 2026	11-50	23
	“For the past 17 years, we have been successfully empowering our clients to protect their business from cyber-threats and comply with industry standards and regulations.” Source: company website · checked Sep 3, 2026
10	CYPROIndirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	22
	“Secure.” Source: company website · checked Sep 3, 2026
11	Addvantage Digital SolutionsPartial evidence	Bolton, United KingdomHQ checked Sep 3, 2026	11-50	21
	“ADDVantage Technologies partner with you to create digital solutions for all your healthcare needs.” Source: company website · checked Sep 3, 2026
12	ClearswiftIndirect evidence	Berkshire, United KingdomHQ checked Sep 3, 2026	201-500	19
	“Why Clearswift?” Source: company website · checked Sep 3, 2026
13	Infosec K2kPartial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	17
	“Infosec K2K safeguards your organisation’s most valuable assets with tailored cybersecurity solutions.” Source: company website · checked Sep 3, 2026
14	Ithealth U.K. LTDPartial evidence	Nottingham, United KingdomHQ checked Sep 3, 2026	11-50	16
	“ITHealth provides proven and trusted cybersecurity and access management solutions to NHS organisations.” Source: company website · checked Sep 3, 2026
15	Loughtec IT Cyber SecurityPartial evidence	Omagh, United KingdomHQ checked Sep 3, 2026	51-200	16
	“LoughTec specialises in IT and cybersecurity solutions, focusing on proactive preventative and reactive measures to exceed both the current and also the new and ever-evolving…” Source: company website · checked Sep 3, 2026
16	CyberhiveIndirect evidence	Newbury, United KingdomHQ checked Sep 3, 2026	11-50	16
	“CyberHive protects the most valued organisations, their people data, and assets, with patented technology that is simple, secure and performant.” Source: company website · checked Sep 3, 2026
17	B10secPartial evidence	Cheltenham, United KingdomHQ checked Sep 3, 2026	11-50	16
	“B10SEC is a company specialising in cybersecurity and data protection services and solutions, headquartered in Gloucestershire, UK, with branches in Portugal, Brazil and Mexico.” Source: company website · checked Sep 3, 2026
18	PericuloIndirect evidence	United KingdomHQ checked Sep 3, 2026	11-50	13
	“Cyber Security for Digital Health Companies From startups to enterprises, navigating security requirements in digital health is difficult.” Source: company website · checked Sep 3, 2026
19	Socguardians LTDPartial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	12
	“Our mission at SOCGuardians is to empower organizations to operate confidently in a digital world by providing cutting-edge cybersecurity services.” Source: company website · checked Sep 3, 2026
20	XentraIndirect evidence	Leeds, United KingdomHQ checked Sep 3, 2026	11-50	10
	“From cyber security, through to safeguarding and compliance, we provide digital security solutions perfectly designed to suit any requirement.” Source: company website · checked Sep 3, 2026
21	Simplified SolutionsIndirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	10
	“Simplified Solutions protects organisation’s most valuable asset – Financial, Customer, Employee and Transactional Data.” Source: company website · checked Sep 3, 2026
22	Medicare NetworkPartial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	7
	“Medicare Network is a niche, agile cybersecurity and risk management company offering a range of industry-leading and advanced solutions that combines human intelligence…” Source: company website · checked Sep 3, 2026

Showing 22 of 115 healthcare cybersecurity companies based in the United Kingdom

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Healthcare cybersecurity companies based in the United Kingdom at a glance

As of Sep 3, 2026

11-50Median size (employees)

LondonLargest hub · 46 HQs

1,057Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

Verified emails by last verification

0–30

31–60

306

61–90

2,174

90–180

1,217

180+

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 healthcare cybersecurity companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “healthcare cybersecurity companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among healthcare cybersecurity companies, 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 an evidence 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, 3,796 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 3, 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.

Healthcare cybersecurity companies by metro

Healthcare cybersecurity companies in London46

Frequently asked

How many healthcare cybersecurity companies are there based in the United Kingdom?

RevenueBase identified 115 healthcare cybersecurity companies 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?

Sophos, headquartered in Abingdon, tops this list with the largest team on record.

Which city has the most healthcare cybersecurity companies?

London leads with 46 headquartered companies, followed by Cheltenham (6) and Bristol (3).

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 3,796 verified decision-maker contacts tracked across these 115 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 3, 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.