Company lists · Data refreshed September 2026

Top 25 Enterprise security architecture services based in the United Kingdom

Name: Enterprise security architecture services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 328 companies tracked

RevenueBase identified 328 enterprise security architecture services headquartered in the United Kingdom as of September 2026 and tracks 2,122 professional contacts across them, including 834 with verified work emails. London is the largest hub.

This list covers enterprise security architecture services 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 28, 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 28, 2026 86% judged on-target in blind review

328Companies

2,122Contacts tracked

834Verified emails

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The 25 largest enterprise security architecture services based in the United Kingdom

Ranked by team size

Top 25 of 328 enterprise security architecture services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise security architecture services: 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	Xalient	Partial evidence	Leeds, United KingdomHQ checked Sep 28, 2026	201-500	260 contacts →
	Partial evidence “We are a global boutique, specializing exclusively in the convergence of identity-driven security and networking.” Source: RevenueBase Database · checked Sep 28, 2026
2	Trpglobal	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	126 contacts →
	Indirect evidence “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: RevenueBase Database · checked Sep 28, 2026
3	Total Security Protection LTD	Strong evidence	Watford, United KingdomHQ checked Sep 28, 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 28, 2026
4	Caretower An Integrity360 Company	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	97 contacts →
	Partial evidence “As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Source: RevenueBase Database · checked Sep 28, 2026
5	Saepio Information Security	Partial evidence	High Wycombe, United KingdomHQ checked Sep 28, 2026	51-200	74 contacts →
	Partial evidence “Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Source: RevenueBase Database · checked Sep 28, 2026
6	SQR Group Security Solutions LTD	Indirect evidence	Barnet, United KingdomHQ checked Sep 28, 2026	501-1,000	58 contacts →
	Indirect evidence “In today’s advanced, interconnected world, protecting the infrastructure that allows society to function is crucial.” Source: RevenueBase Database · checked Sep 28, 2026
7	Cyberlab	Strong evidence	Alderley Edge, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Strong evidence “CyberLab is the UK-leading cyber security consultancy and managed services provider, trusted by over 1,200 enterprise businesses, government departments, and household names to…” Source: RevenueBase Database · checked Sep 28, 2026
8	Marx Enterprise Transformation Architecture	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	49 contacts →
	Strong evidence “Marx Group is a leading global AI fueled Solutions & Products firm with a solid framework of Enterprise Architecture as Service to master rapid changes.” Source: RevenueBase Database · checked Sep 28, 2026
9	Cornerstone	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	44 contacts →
	Partial evidence “CornerStone is an award winning, independent, security and digital building consulting firm with headquarters in the UK.” Source: RevenueBase Database · checked Sep 28, 2026
10	Omerta	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Omerta - A Global Security Technology and Services Company.” Source: RevenueBase Database · checked Sep 28, 2026
11	Omnicyber Security	Partial evidence	Solihull, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Partial evidence “SPECIALISTS IN IT SECURITY AND COMPLIANCE Our goal is to help customers define, develop and implement information security and compliance services, no matter what stage of the…” Source: RevenueBase Database · checked Sep 28, 2026
12	Cyber Security Specialists	Partial evidence	Altrincham, United KingdomHQ checked Sep 28, 2026	11-50	26 contacts →
	Partial evidence “Based in Manchester UK, we are an independent Cyber Security Consultancy providing Security services across a wide range of markets, from multi-national Corporate Organisations…” Source: RevenueBase Database · checked Sep 28, 2026
13	CES Security Solutions LTD	Indirect evidence	Rochester, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “More than just a manufacturer, we offer a full service.” Source: RevenueBase Database · checked Sep 28, 2026
14	Gradian	Indirect evidence	Farnborough, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Gradian offers pre-sales support, bespoke consultancy and managed services to protect your most critical assets from cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
15	Chaleit	Partial evidence	Cambridge, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “Chaleit is a cyber security management consultancy that aligns business context with real-world capability to solve complex risks.” Source: RevenueBase Database · checked Sep 28, 2026
16	Aindale KTD	Indirect evidence	Huddersfield, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “Aindale, established in 1985, is a leading provider of IT solutions and services.” Source: RevenueBase Database · checked Sep 28, 2026
17	LMS Security	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “LMS Security are a fully Independent, privately owned, Internationally recognised and accredited Security Consultancy; owned and built by Electronic and Physical Security…” Source: RevenueBase Database · checked Sep 28, 2026
18	NGS Next Generation Security	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “Formed in 2018, NGS (UK) Ltd are independent, Next Generation Security trusted advisors, providing all-encompassing solutions from the perimeter to the endpoint.” Source: RevenueBase Database · checked Sep 28, 2026
19	Razorthorn Security	Partial evidence	Tunbridge Wells, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “Razorthorn Security is a specialist cybersecurity consultancy founded in 2007, with nearly two decades of experience helping organisations protect their data, their systems and…” Source: RevenueBase Database · checked Sep 28, 2026
20	DEV Null Security	Strong evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Strong evidence “We are a cyber security consultancy that specialises in security solution architecture, engineering, implementation and operational support.” Source: RevenueBase Database · checked Sep 28, 2026
21	Sinevis	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “We are a leading cybersecurity services organization with more than a decade of proven expertise in consulting, solution implementation and managed services.” Source: RevenueBase Database · checked Sep 28, 2026
22	David Lynas Consulting	Partial evidence	Belfast, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “Cybersecurity should be integrated cohesively across the enterprise, promoting consistency, scalability, and efficiency.” Source: RevenueBase Database · checked Sep 28, 2026
23	First City Care	Partial evidence	Welwyn Garden City, United KingdomHQ checked Sep 28, 2026	51-200	15 contacts →
	Partial evidence “Electronic Security Systems Design, Installation and Maintenance Provider.” Source: RevenueBase Database · checked Sep 28, 2026
24	Ansec Consulting	Indirect evidence	Antrim, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “ANSEC is the consulting division of Outsource Group established in May 2007 and with a proven track record in working with some of the countries most highly regarded businesses…” Source: RevenueBase Database · checked Sep 28, 2026
25	Consultive Solutions Limited	Partial evidence	Co.durham, United KingdomHQ checked Sep 28, 2026	1-10	12 contacts →
	Partial evidence “Consultive Solutions Limited are a Security & Communications Consultancy and Project Delivery company, with in-depth industry knowledge and extensive experience in physical and…” Source: RevenueBase Database · checked Sep 28, 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: enterprise security architecture services. 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 enterprise security architecture services.
Partial evidence: Its own public description names part of enterprise security architecture services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security architecture services. 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 328 enterprise security architecture services based in the United Kingdom

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Enterprise security architecture services based in the United Kingdom at a glance

As of Sep 28, 2026

39.3%Verified-email coverage

6.5Average contacts per company

1-10Median size (employees)

31.4%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

239

11-50

51-200

201-500

501-1,000

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 328 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 enterprise security architecture services, 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 “enterprise security architecture services”. 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 enterprise security architecture services), 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 enterprise security architecture services, 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, 834 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 28, 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.

Enterprise security architecture services by metro

Enterprise security architecture services in London103

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 enterprise security architecture services, 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 enterprise security architecture services are there based in the United Kingdom?

RevenueBase identified 328 enterprise security architecture services 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?

Xalient, headquartered in Leeds, tops this list with the largest team on record.

Which city has the most enterprise security architecture services?

London leads with 103 headquartered companies, followed by Manchester (9) and Birmingham (5).

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 834 verified decision-maker contacts tracked across these 328 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 28, 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.