Company lists · Data refreshed September 2026

Top 25 Cybersecurity integrators based in the United Kingdom

RevenueBase identified 3,892 company matches for cybersecurity integrators associated with the United Kingdom as of September 2026 and tracks 75,685 professional contacts across them, including 29,517 with verified work emails and 6,082 with mobile numbers. London is the largest hub.

This list covers company matches for cybersecurity integrators associated with the 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 29, 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 29, 2026 How this list was built
3,892Companies
75,685Contacts tracked
29,517Verified emails
6,082Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest cybersecurity integrators based in the United Kingdom

Ranked by team size
Top 25 of 3,892 company matches for cybersecurity integrators based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 matchAbingdon, United KingdomHQ recorded Sep 29, 20265,001-10,0004,925 contacts →

Exact match

“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchCambridge, United KingdomHQ recorded Sep 29, 20261,001-5,0002,355 contacts →

Exact match

“Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 29, 20261,001-5,0002,304 contacts →

Exact match

“organizations.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchFolkestone, United KingdomHQ recorded Sep 29, 2026n/a1,975 contacts →

Exact match

“Hack The Box is the leading AI-powered cybersecurity readiness and upskilling platform, trusted by 1,500+ organizations worldwide, including Fortune 500 enterprises, government…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,0001,508 contacts →

Exact match

“Noventiq (Noventiq Holdings PLC) is a leading global solutions and services provider in digital transformation and cybersecurity, headquartered in London.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchNorthampton, United KingdomHQ recorded Sep 29, 202610001+1,508 contacts →

Exact match

“We are an intelligence-led security business.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchStaines-upon-thames, United KingdomHQ recorded Sep 29, 2026201-500764 contacts →

Exact match

“MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchRomsey, United KingdomHQ recorded Sep 29, 20261,001-5,000679 contacts →

Exact match

“At Roke, we stand at the forefront of defence and security, delivering cutting-edge intelligence and engineering solutions that protect nations, troops, borders, and businesses.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchSt Neots, United KingdomHQ recorded Sep 29, 2026201-500640 contacts →

Exact match

“MASS, part of the Cohort plc group, helps you realise the value of your data.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchCroydon, United KingdomHQ recorded Sep 29, 2026501-1,000608 contacts →

Exact match

“In a complex global landscape, leaders need accurate information and full context quickly.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchFleet, United KingdomHQ recorded Sep 29, 20261,001-5,000540 contacts →

Exact match

“Dimension Data uses the power of technology to help organisations achieve great things.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 29, 2026501-1,000502 contacts →

Exact match

“SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchNelson, United KingdomHQ recorded Sep 29, 2026501-1,000493 contacts →

Exact match

“Through our team of over 900 creative individuals, we've positioned ourselves as a respected force as a life safety systems integrator.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchBurgess Hill, United KingdomHQ recorded Sep 29, 2026501-1,000423 contacts →

Exact match

“We’ve been on a mission to bring together people and technology since the day we were founded over 25 years ago.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchCirencester, United KingdomHQ recorded Sep 29, 20261,001-5,000422 contacts →

Exact match

“Unlike traditional security providers, we're redefining what protection means in today's world.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchYork, United KingdomHQ recorded Sep 29, 2026501-1,000421 contacts →

Exact match

“Trustmarque delivers the value of technology to bring real-life impact.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchExeter, United KingdomHQ recorded Sep 29, 2026501-1,000386 contacts →

Exact match

“Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchNottingham, United KingdomHQ recorded Sep 29, 2026201-500364 contacts →

Exact match

“Littlefish is a multi-award-winning Managed IT Services Provider that continues to grow consistently and significantly through tangibly delivering on our promises of enhanced user…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 29, 20265,001-10,000358 contacts →

Exact match

“ASEL design, develop and deliver fully bespoke and integrated security solutions, seamlessly bringing together people, technology and processes to achieve results-driven outcomes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchBristol, United KingdomHQ recorded Sep 29, 2026201-500352 contacts →

Exact match

“The leader in people-centric cyber resilience.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 29, 2026201-500351 contacts →

Exact match

“S-RM is a global intelligence and cyber security consultancy.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchStone, United KingdomHQ recorded Sep 29, 2026201-500351 contacts →

Exact match

“What we do | With a focus on operational technology and digital transformation, Capula has been a leader in advanced system integration for decades; optimising efficiency &…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchBradford, United KingdomHQ recorded Sep 29, 2026501-1,000326 contacts →

Exact match

“Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchWest End, United KingdomHQ recorded Sep 29, 2026201-500326 contacts →

Exact match

“As our name suggests, our customers rely on us in providing suitable technology inputs to support their business goals.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchReading, United KingdomHQ recorded Sep 29, 2026201-500303 contacts →

Exact match

“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 3,892 cybersecurity integrators based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 29,517 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Cybersecurity integrators based in the United Kingdom at a glance

As of Sep 29, 2026
39.0%Verified-email coverage
8.0%Mobile-number coverage
19.4Average contacts per company
1-10Median size (employees)
33.0%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
2,178
11-50
1,198
51-200
356
201-500
90
501-1,000
24
1,001-5,000
22
5,001-10,000
6
10001+
7

Freshness & accuracy

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

Email last verified

Median 31.0d

Company record updated

Median 91.0d

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 the United Kingdom whose business descriptions match “cybersecurity integrators” 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 29,517 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 29, 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 “cybersecurity integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity integrators are there based in the United Kingdom?

RevenueBase identified 3,892 company matches for cybersecurity integrators associated with the 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?

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

Which city has the most cybersecurity integrators?

London leads with 1285 company records, followed by Manchester (109) and Birmingham (63).

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 29,517 professional contacts with verified work emails tracked across these 3,892 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 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,892 cybersecurity integrators based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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.