Company lists · Data refreshed September 2026

Top 25 AI security solutions software companies based in the United Kingdom

Name: AI security solutions software 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 14, 2026 173 companies tracked

RevenueBase identified 173 AI security solutions software companies headquartered in the United Kingdom as of September 2026 and tracks 11,884 professional contacts across them, including 6,586 with verified work emails. London is the largest hub.

This list covers AI security solutions software 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

173Companies

11,884Contacts tracked

6,586Verified emails

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The 25 largest AI security solutions software companies based in the United Kingdom

Ranked by team size

Top 25 of 173 AI security solutions software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to AI security solutions software companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sophos	Partial evidence	Abingdon, United KingdomHQ checked Sep 14, 2026	5,001-10,000	4,925 contacts →
	Partial evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 14, 2026
2	Darktrace	Partial evidence	Cambridge, United KingdomHQ checked Sep 14, 2026	1,001-5,000	2,355 contacts →
	Partial evidence “Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.” Source: RevenueBase Database · checked Sep 14, 2026
3	Mimecast	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	1,001-5,000	2,304 contacts →
	Indirect evidence “organizations.” Source: RevenueBase Database · checked Sep 14, 2026
4	Quorum Cyber	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 14, 2026	201-500	297 contacts →
	Indirect evidence “At Quorum Cyber, we're on a mission to help good people win.” Source: RevenueBase Database · checked Sep 14, 2026
5	Gorilla Technology Group	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	187 contacts →
	Strong evidence “Headquartered in London U.K, Gorilla is a global solution provider in Security Intelligence, Network Intelligence, Business Intelligence and IoT technology.” Source: RevenueBase Database · checked Sep 14, 2026
6	Total Security Protection LTD	Strong evidence	Watford, United KingdomHQ checked Sep 14, 2026	51-200	116 contacts →
	Strong evidence “TSP has a reputation for providing enterprise security solutions, as well as excellent system integration standards and exceptional aftercare support, since its founding in 1988.” Source: RevenueBase Database · checked Sep 14, 2026
7	RED Sift	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	109 contacts →
	Indirect evidence “Red Sift enables organizations to anticipate, respond to, and recover from cyber attacks while continuing to operate effectively.” Source: RevenueBase Database · checked Sep 14, 2026
8	H&m Security Services Limited	Partial evidence	Woodford Green, United KingdomHQ checked Sep 14, 2026	51-200	78 contacts →
	Partial evidence “We are an SIA Approved Contractor, specializing in Manned Guarding and CCTV solutions.” Source: RevenueBase Database · checked Sep 14, 2026
9	OSL Technology	Strong evidence	Reading, United KingdomHQ checked Sep 14, 2026	51-200	77 contacts →
	Strong evidence “At OSL, our mission is to deliver adaptive security solutions that protect high-value, risk-prone areas by integrating innovative technologies designed to manage both aerial and…” Source: RevenueBase Database · checked Sep 14, 2026
10	Eset UK	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 14, 2026	51-200	66 contacts →
	Indirect evidence “We help businesses and individuals stay protected in an increasingly complex digital world.” Source: RevenueBase Database · checked Sep 14, 2026
11	Aecor Digital	Strong evidence	Chiswick, United KingdomHQ checked Sep 14, 2026	51-200	64 contacts →
	Strong evidence “We engineer secure, AI-driven software that helps businesses build, transform, and scale with confidence.” Source: RevenueBase Database · checked Sep 14, 2026
12	Senseon	Indirect evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	54 contacts →
	Indirect evidence “SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…” Source: RevenueBase Database · checked Sep 14, 2026
13	Cybaverse	Strong evidence	Portsmouth, United KingdomHQ checked Sep 14, 2026	51-200	41 contacts →
	Strong evidence “We are on a mission to simplify and scale cyber security by combining AI, automation, expert-led services, in a unified platform: giving every organisation, from MSPs to global…” Source: RevenueBase Database · checked Sep 14, 2026
14	Gratte Brothers Security Systems & Software	Strong evidence	London, United KingdomHQ checked Sep 14, 2026	51-200	39 contacts →
	Strong evidence “Gratte Brothers is an experienced provider of integrated security solutions, which are Built on Strong Values and ultimately deliver a measurable return on investment.” Source: RevenueBase Database · checked Sep 14, 2026
15	Nothreat	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	36 contacts →
	Partial evidence “The future of IoT/OT security is here.” Source: RevenueBase Database · checked Sep 14, 2026
16	defense.com	Partial evidence	Stevenage, United KingdomHQ checked Sep 14, 2026	51-200	32 contacts →
	Partial evidence “Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.” Source: RevenueBase Database · checked Sep 14, 2026
17	VIS Security Solutions Limited	Strong evidence	Belfast, United KingdomHQ checked Sep 14, 2026	51-200	30 contacts →
	Strong evidence “WELCOME TO VIS SECURITY SOLUTIONS LIMITED Headquartered in the UK and Ireland, ViS specialises in providing bespoke physical security solutions by converging multiple advanced…” Source: RevenueBase Database · checked Sep 14, 2026
18	Cortech Developments	Strong evidence	Knutsford, United KingdomHQ checked Sep 14, 2026	11-50	30 contacts →
	Strong evidence “Established in 1992, Cortech Developments is a successful UK based company who specialise in software integration solutions for smarter building, fire, safety and security systems.” Source: RevenueBase Database · checked Sep 14, 2026
19	Reflex Systems LTD	Partial evidence	Rotherham, United KingdomHQ checked Sep 14, 2026	11-50	24 contacts →
	Partial evidence “Reflex Systems is a leading UK owned security and fire systems specialist, established in 1987 and based in South Yorkshire.” Source: RevenueBase Database · checked Sep 14, 2026
20	Blockapt	Partial evidence	Southwark, United KingdomHQ checked Sep 14, 2026	11-50	16 contacts →
	Partial evidence “Award-winning BlockAPT is redefining cybersecurity with an AI-powered, autonomous, self-defending platform built to protect modern digital ecosystems at speed and scale.” Source: RevenueBase Database · checked Sep 14, 2026
21	Realtime Biometrics Limited	Indirect evidence	Kensington, United KingdomHQ checked Sep 14, 2026	11-50	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
22	ISM LTD	Strong evidence	Crawley, United KingdomHQ checked Sep 14, 2026	11-50	15 contacts →
	Strong evidence “ISM is a Solutions Business with more than 30 years world leading experience in the manufacturing and inventing of integrated security management solutions, encompassing alarm…” Source: RevenueBase Database · checked Sep 14, 2026
23	ADM Computing Limited	Strong evidence	Knutsford, United KingdomHQ checked Sep 14, 2026	1-10	14 contacts →
	Strong evidence “ADM is your trusted partner in IT solutions, specialising in Managed Services, Cybersecurity, and AI-driven innovation.” Source: RevenueBase Database · checked Sep 14, 2026
24	LEO Cybsec	Partial evidence	London, United KingdomHQ checked Sep 14, 2026	11-50	14 contacts →
	Partial evidence “Leo CybSec is the company behind Hoplon, an AI-powered cybersecurity platform designed for growing, data-driven businesses.” Source: RevenueBase Database · checked Sep 14, 2026
25	CDS Integrated Security Systems	Strong evidence	Pontypridd, United KingdomHQ checked Sep 14, 2026	11-50	13 contacts →
	Strong evidence “At CDS we provide integrated security solutions.” Source: RevenueBase Database · checked Sep 14, 2026

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: AI security solutions software 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 AI security solutions software companies.
Partial evidence: Its own public description names part of AI security solutions software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name AI security solutions software 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 173 AI security solutions software companies based in the United Kingdom

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AI security solutions software companies based in the United Kingdom at a glance

As of Sep 14, 2026

55.4%Verified-email coverage

68.7Average contacts per company

11-50Median size (employees)

42.8%Largest-city concentration · London

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 173 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 AI security solutions software 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 the United Kingdom whose own description of what they do matches “AI security solutions software 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 AI security solutions software 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 AI security solutions software 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 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, 6,586 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 14, 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.

AI security solutions software companies by metro

AI security solutions software companies in London74

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 AI security solutions software 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 AI security solutions software companies are there based in the United Kingdom?

RevenueBase identified 173 AI security solutions software 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 AI security solutions software companies?

London leads with 74 headquartered companies, followed by Manchester (5) and Birmingham (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 6,586 verified decision-maker contacts tracked across these 173 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 14, 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.