Company lists · Data refreshed September 2026

Top 24 Intrusion detection companies based in the United Kingdom

RevenueBase identified 94 company matches for intrusion detection companies associated with the United Kingdom as of September 2026 and tracks 772 professional contacts across them, including 270 with verified work emails. London is the largest hub.

This list covers company matches for intrusion detection companies 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 20, 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 20, 2026 How this list was built
94Companies
772Contacts tracked
270Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 24 largest intrusion detection companies based in the United Kingdom

Ranked by team size
Top 24 of 94 company matches for intrusion detection companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 matchLondon, United KingdomHQ recorded Sep 20, 202651-20088 contacts →

Exact match

“Dedicated to securing the networks society depends on.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchBlandford, United KingdomHQ recorded Sep 20, 202651-20068 contacts →

Exact match

“The organisations that run our world face relentless complexity and evolving threats.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchBournemouth, United KingdomHQ recorded Sep 20, 202651-20066 contacts →

Exact match

“We help businesses and individuals stay protected in an increasingly complex digital world.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchEdinburgh, United KingdomHQ recorded Sep 20, 2026201-50051 contacts →

Exact match

“We are Adarma, independent leaders in detection and response services.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchCheltenham, United KingdomHQ recorded Sep 20, 202651-20042 contacts →

Exact match

“CoreTech is a specialist cyber security company whose people are motivated by the desire to deliver exceptional capabilities coupled with a real sense of mission.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchStevenage, United KingdomHQ recorded Sep 20, 202651-20032 contacts →

Exact match

“Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchPeterborough, United KingdomHQ recorded Sep 20, 202651-20032 contacts →

Exact match

“Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 20, 202651-20029 contacts →

Exact match

“CYJAX is an award-winning technology company and provider of digital threat intelligence services to international corporations, law enforcement agencies and the public sector.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchBerkshire, United KingdomHQ recorded Sep 20, 2026201-50019 contacts →

Exact match

“Why Clearswift?”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchNewbury, United KingdomHQ recorded Sep 20, 202611-5016 contacts →

Exact match

“CyberHive protects the most valued organisations, their people data, and assets, with patented technology that is simple, secure and performant.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 20, 202611-5010 contacts →

Exact match

“PC POWER INTERNATIONAL LTD is a computer & network security company based in the City, London, United Kingdom.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 20, 202611-508 contacts →

Exact match

“Cyberseer offers Advanced Threat Detection and a 24×7 Managed Security Service (MSS).”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchReading, United KingdomHQ recorded Sep 20, 202611-507 contacts →

Exact match

“Rebasoft is a UK based Software and Services company, founded in 2009 and produces software solutions for the Cyber Security market space.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchBirmingham, United KingdomHQ recorded Sep 20, 20261-106 contacts →

Exact match

“Tactile Technology is a leading provider of comprehensive physical and cyber security services.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 20, 20261-105 contacts →

Exact match

“Automate the boring.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchTheale, United KingdomHQ recorded Sep 20, 20261-105 contacts →

Exact match

“Vigilant helps organisations mitigate and protect against insider threats.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 20, 202611-505 contacts →

Exact match

“SecurityZONES provides data from the leading security research organizations worldwide.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 20, 20261-104 contacts →

Exact match

“Knowing your external threat landscape gives you real-time information necessary to protect your business from cyberattacks and increases your awareness of external risks.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchGeddington, United KingdomHQ recorded Sep 20, 202611-502 contacts →

Exact match

“Established in 1992 by Managing Director Roger Haynes.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchRowlands Castle, United KingdomHQ recorded Sep 20, 20261-102 contacts →

Exact match

“CSIQ provides leading Cyber Security and Intelligence solutions delivered by industry experts to businesses of all sizes in the United Kingdom.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchAlton, United KingdomHQ recorded Sep 20, 20261-102 contacts →

Exact match

“Crime Dectecion Systems is a security based company”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 20, 20261-102 contacts →

Exact match

“Essential Security is a unique company in that we offer a specialised and confidential service meeting your bespoke technological and communications requirements.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 20, 20261-102 contacts →

Exact match

“Seedata.io detect attackers by luring them to disclose their presence, turning their own techniques against them.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 20, 202611-501 contacts →

Exact match

“SOC.OS has joined the Sophos family!”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 24 of 94 intrusion detection companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 270 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Intrusion detection companies based in the United Kingdom at a glance

As of Sep 20, 2026
35.0%Verified-email coverage
8.2Average contacts per company
1-10Median size (employees)
40.4%Largest-city concentration · London
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
51
11-50
26
51-200
10
201-500
6
501-1,000
1

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 94 companies.

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 “intrusion detection companies” 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 270 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 20, 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 “intrusion detection companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many intrusion detection companies are there based in the United Kingdom?

RevenueBase identified 94 company matches for intrusion detection companies 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?

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

Which city has the most intrusion detection companies?

London leads with 38 company records, followed by Manchester (3) and Bournemouth (2).

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 270 professional contacts with verified work emails tracked across these 94 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 94 intrusion detection companies 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.