Company lists · Data refreshed September 2026

Top 25 Telecom security consulting companies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 94 companies tracked

RevenueBase identified 94 telecom security consulting companies headquartered in London, United Kingdom as of September 2026 and tracks 480 professional contacts across them, including 127 with verified work emails and 20 with mobile numbers. London is the largest hub.

This list covers telecom security consulting companies 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 13, 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 13, 2026 86% judged on-target in blind review

94Companies

480Contacts tracked

127Verified emails

20Mobile numbers

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The 25 largest telecom security consulting companies based in London, United Kingdom

Ranked by team size

Top 25 of 94 telecom security consulting companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to telecom security consulting 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	Caretower An Integrity360 Company	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
2	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	60 contacts →
	Indirect evidence “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Source: RevenueBase Database · checked Sep 13, 2026
3	Aarmtech Engineering Pvt. LTD	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	23 contacts →
	Strong evidence “AARMTech is one of the pioneers in the field of Telecommunication and Security system engineering consultancy services, we are leading in the industry since its inception.” Source: RevenueBase Database · checked Sep 13, 2026
4	LMS Security	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
5	NGS Next Generation Security	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
6	QCC Global LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	12 contacts →
	Indirect evidence “QCC Global Ltd is a leading global supplier of counter espionage and technical surveillance counter measures (TSCM) services to government, police and commercial organisations.” Source: RevenueBase Database · checked Sep 13, 2026
7	Code Technology LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	8 contacts →
	Partial evidence “Code exists to challenge, rethink and refine the selection, procurement and support of mobile telecommunications services for business users.” Source: RevenueBase Database · checked Sep 13, 2026
8	Stratia Cyber	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	8 contacts →
	Partial evidence “Stratia Cyber is an independent, technology agnostic company providing high quality, pragmatic cyber security consultancy and expertise, is a founder member of the NCSC Certified…” Source: RevenueBase Database · checked Sep 13, 2026
9	Cortida	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	7 contacts →
	Indirect evidence “Through excellent consultancy we protect clients from reputation damage, financial penalties and the operational disruption associated with data incidents and cyberattacks.” Source: RevenueBase Database · checked Sep 13, 2026
10	Kloudwerk	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	7 contacts →
	Strong evidence “Kloudwerk offers a game-changing approach to cyber security consulting for SMEs.” Source: RevenueBase Database · checked Sep 13, 2026
11	GOS Systems	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	7 contacts →
	Partial evidence “We are a global telecommunications carrier, delivering specialised telecommunication services to government agencies and commercial entities.” Source: RevenueBase Database · checked Sep 13, 2026
12	Bespoke Telecoms & Cctv	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	6 contacts →
	Partial evidence “Since 2010, Bespoke Telecoms have been providing some of the of the finest business and residential properties in the Country with the fastest possible internet services…” Source: RevenueBase Database · checked Sep 13, 2026
13	Westlands Advisory	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	4 contacts →
	Partial evidence “Westlands Advisory (WA) works exclusively on security market issues, helping industry, government and security professionals to minimise business risk and improve performance…” Source: RevenueBase Database · checked Sep 13, 2026
14	Soniza	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	4 contacts →
	Partial evidence “Soniza is a truly independent telecoms consultancy.” Source: RevenueBase Database · checked Sep 13, 2026
15	Phoenix Maxwell Global Limited	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	4 contacts →
	Partial evidence “The team at Phoenix Maxwell Global Limited have a combined experience of over 30 years in the telecoms sector.” Source: RevenueBase Database · checked Sep 13, 2026
16	HMH Security Consultants	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	2 contacts →
	Strong evidence “HMH Consulting LLC is a Texas-based security consultancy operating at the intersection of physical and cyber risk, serving high-net-worth individuals, luxury retailers…” Source: RevenueBase Database · checked Sep 13, 2026
17	Sesseto Limited	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	2 contacts →
	Partial evidence “Good security consultants are difficult to find, expensive to employ and hard to keep, but we believe that your business doesn’t have to incur a high cost of delivery in order to…” Source: RevenueBase Database · checked Sep 13, 2026
18	Essential Security UK LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	2 contacts →
	Partial evidence “Essential Security is a unique company in that we offer a specialised and confidential service meeting your bespoke technological and communications requirements.” Source: RevenueBase Database · checked Sep 13, 2026
19	Centilon LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	2 contacts →
	Partial evidence “Centilon Limited provides leading edge security solutions, consultancy and bespoke training to organisations that have a requirement to secure & manage their network…” Source: RevenueBase Database · checked Sep 13, 2026
20	Evasec LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	2 contacts →
	Partial evidence “We are an Information Security Consultancy specialised in the fields of Information Security Management, IT Security Architecture, Intellectual Property Protection and Digital…” Source: RevenueBase Database · checked Sep 13, 2026
21	Cognetix Limited	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	2 contacts →
	Partial evidence “Cognetix Limited is a technical consultancy company within Security and Surveillance Industry, with a large presence in the Public Sector.” Source: RevenueBase Database · checked Sep 13, 2026
22	EST Applied Intelligence	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	1 contacts →
	Partial evidence “EST Applied Intelligence is a specialist enterprise security consultancy dedicated to building strategic resilience in an increasingly complex digital world.” Source: RevenueBase Database · checked Sep 13, 2026
23	Atlan Digital R&d Limited	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	1 contacts →
	Strong evidence “Offensive security consulting for consultancies, MSSPs, corporates & governments.” Source: RevenueBase Database · checked Sep 13, 2026
24	Enkrypta	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Partial evidence “Organisations are increasingly operating in hostile environments which often leave them vulnerable to a number of security threats.” Source: RevenueBase Database · checked Sep 13, 2026
25	Smartech Consulting LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	1 contacts →
	Partial evidence “Specialising in Telecommunications and Technology.” Source: RevenueBase Database · checked Sep 13, 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: telecom security consulting 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 telecom security consulting companies.
Partial evidence: Its own public description names part of telecom security consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom security consulting 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 94 telecom security consulting companies based in London, United Kingdom

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Telecom security consulting companies based in London, United Kingdom at a glance

As of Sep 13, 2026

26.5%Verified-email coverage

4.2%Mobile-number coverage

5.1Average contacts per company

1-10Median size (employees)

124.5%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

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

Email last verified

Median 15.0d

1040–30

2231–60

161–90

090–180

0180+

Company record updated

Median 78.0d

00–30

15231–60

24161–90

5390–180

34180+

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 telecom security consulting 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 London, United Kingdom whose own description of what they do matches “telecom security consulting 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 telecom security consulting 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 telecom security consulting companies, 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, 127 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 13, 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.

Telecom security consulting companies by metro in the United Kingdom

Telecom security consulting companies in London117

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 telecom security consulting 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 telecom security consulting companies are there based in London, United Kingdom?

RevenueBase identified 94 telecom security consulting companies 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?

Caretower An Integrity360 Company, headquartered in London, tops this list with the largest team on record.

Which city has the most telecom security consulting companies?

London leads with 117 headquartered companies, followed by Manchester (14) and Bristol (8).

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 127 verified decision-maker contacts tracked across these 94 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 13, 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.