Company lists · Data refreshed September 2026

Top 24 Corporate security consultants based in London, United Kingdom

Name: Corporate security consultants based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 9, 2026 340 companies tracked

RevenueBase identified 340 corporate security consultants headquartered in London, United Kingdom as of September 2026 and tracks 3,770 professional contacts across them, including 678 with verified work emails and 144 with mobile numbers. London is the largest hub.

This list covers corporate security consultants headquartered in London, 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 9, 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 9, 2026 86% judged on-target in blind review

340Companies

3,770Contacts tracked

678Verified emails

144Mobile numbers

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The 24 largest corporate security consultants based in London, United Kingdom

Ranked by team size

Top 24 of 340 corporate security consultants based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 9, 2026. RevenueBase Smart Search rates how each company's information relates to corporate security consultants: 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	CIS Security Limited	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	1,001-5,000	919 contacts →
	Partial evidence “CIS Security is an independent security company equipped to help customers to solve the complex challenges in today’s digital, connected and regulated business world.” Source: RevenueBase Database · checked Sep 9, 2026
2	Ward Security	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	1,001-5,000	419 contacts →
	Partial evidence “Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…” Source: RevenueBase Database · checked Sep 9, 2026
3	Trpglobal	Indirect evidence	London, United KingdomHQ checked Sep 9, 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 9, 2026
4	Caretower An Integrity360 Company	Partial evidence	London, United KingdomHQ checked Sep 9, 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 9, 2026
5	Black Diamond Security	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	201-500	58 contacts →
	Partial evidence “Black Diamond Security - Safeguarding Your World.” Source: RevenueBase Database · checked Sep 9, 2026
6	Frankton Group LTD	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	51-200	48 contacts →
	Indirect evidence “In today’s complex threat environment, businesses, individuals, and organisations require trusted partners to provide the ultimate assurance that their assets are well protected.” Source: RevenueBase Database · checked Sep 9, 2026
7	UK Protection LTD	Strong evidence	London, United KingdomHQ checked Sep 9, 2026	201-500	45 contacts →
	Strong evidence “UK Protection is widely recognised as the premier supplier of security solutions to the Corporate, Jewellery and Luxury Retail industries across the UK.” Source: RevenueBase Database · checked Sep 9, 2026
8	Cornerstone	Partial evidence	London, United KingdomHQ checked Sep 9, 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 9, 2026
9	Ak9 Security And FM Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	501-1,000	43 contacts →
	Partial evidence “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Source: RevenueBase Database · checked Sep 9, 2026
10	Gratte Brothers Security Systems & Software	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	51-200	39 contacts →
	Partial 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 9, 2026
11	Secforce LTD	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	39 contacts →
	Partial evidence “SECFORCE are vendor independent offensive security specialists providing effective business risk intelligence and strategic security consulting.” Source: RevenueBase Database · checked Sep 9, 2026
12	Team Fusion LTD	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	34 contacts →
	Partial evidence “Our elite teams offer bespoke, integrated security solutions that adapt and react to the evolving threat landscape.” Source: RevenueBase Database · checked Sep 9, 2026
13	Skylark Security LTD	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	n/a	34 contacts →
	Partial evidence “Skylark is a bespoke security service provider based in London.” Source: RevenueBase Database · checked Sep 9, 2026
14	Capstar	Strong evidence	London, United KingdomHQ checked Sep 9, 2026	51-200	30 contacts →
	Strong evidence “Capstar provides technology-enabled threat, risk and security services to private and corporate clients.” Source: RevenueBase Database · checked Sep 9, 2026
15	Priavo Security	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	28 contacts →
	Partial evidence “Priavo Security Group is an established provider of comprehensive security risk management, dedicated to safeguarding individuals, information, assets, and reputation through…” Source: RevenueBase Database · checked Sep 9, 2026
16	Se24	Strong evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	24 contacts →
	Strong evidence “A core member of the Chelsea Group Security & Crisis Management Division, Security Exchange is dedicated to the provision of specialist consultancy on a worldwide basis…” Source: RevenueBase Database · checked Sep 9, 2026
17	Kiris Group	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	22 contacts →
	Partial evidence “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Source: RevenueBase Database · checked Sep 9, 2026
18	Anotherday	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	21 contacts →
	Partial evidence “AnotherDay is a new kind of defence & security consulting firm established to bring the power of effective intelligence and strategy to the challenge of safeguarding individuals…” Source: RevenueBase Database · checked Sep 9, 2026
19	LMS Security	Strong evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	20 contacts →
	Strong 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 9, 2026
20	NGS Next Generation Security	Partial evidence	London, United KingdomHQ checked Sep 9, 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 9, 2026
21	Optimal Risk Group LTD	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	20 contacts →
	Indirect evidence “We optimise opportunities for our clients by managing their Risk & Resilience.” Source: RevenueBase Database · checked Sep 9, 2026
22	The Portmarnock Group	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	51-200	19 contacts →
	Partial evidence “The Portmarnock Group was built from years of experience, hard work and a genuine passion for doing security differently.” Source: RevenueBase Database · checked Sep 9, 2026
23	Insight Risk Management	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	19 contacts →
	Partial evidence “Insight Risk Management assures you, the client of a professional team of experts, providing quality service and offering you optimised security solutions for an array of specific…” Source: RevenueBase Database · checked Sep 9, 2026
24	ALMA	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	18 contacts →
	Indirect evidence “Your Partner Delivering Risk-Proof Success: UK-Based Expertise, Delivering Global Risk Management.” Source: RevenueBase Database · checked Sep 9, 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: corporate security consultants. 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 corporate security consultants.
Partial evidence: Its own public description names part of corporate security consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name corporate security consultants. 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 24 of 340 corporate security consultants based in London, United Kingdom

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Corporate security consultants based in London, United Kingdom at a glance

As of Sep 9, 2026

18.0%Verified-email coverage

3.8%Mobile-number coverage

11.1Average contacts per company

1-10Median size (employees)

84.7%Largest-city concentration · London

Sep 9, 2026Page data refreshed

Companies by employee count

1-10

172

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

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

Email last verified

Median 11.0d

6200–30

5731–60

161–90

090–180

0180+

Company record updated

Median 75.0d

00–30

1,07531–60

1,93761–90

55890–180

200180+

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 corporate security consultants, 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 London, United Kingdom whose own description of what they do matches “corporate security consultants”. 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 corporate security consultants), 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 corporate security consultants, and records with no verified work email. Companies headquartered outside London 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, 678 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 9, 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.

Corporate security consultants by metro in the United Kingdom

Corporate security consultants in London288

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 corporate security consultants, 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 corporate security consultants are there based in London, United Kingdom?

RevenueBase identified 340 corporate security consultants headquartered in London, 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?

CIS Security Limited, headquartered in London, tops this list with the largest team on record.

Which city has the most corporate security consultants?

London leads with 288 headquartered companies, followed by Manchester (14) and Birmingham (13).

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 678 verified decision-maker contacts tracked across these 340 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 9, 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.