Company lists · Data refreshed September 2026

Top 25 5g security consulting companies based in London, United Kingdom

Name: 5g 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 27, 2026 112 companies tracked

RevenueBase identified 112 5g security consulting companies headquartered in London, United Kingdom as of September 2026 and tracks 2,230 professional contacts across them, including 194 with verified work emails and 517 with mobile numbers. London is the largest hub.

This list covers 5g 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 27, 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 27, 2026 86% judged on-target in blind review

112Companies

2,230Contacts tracked

194Verified emails

517Mobile numbers

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The 25 largest 5g security consulting companies based in London, United Kingdom

Ranked by team size

Top 25 of 112 5g security consulting companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to 5g 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	Sytel Reply	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	68 contacts →
	Partial evidence “Sytel Reply is the Reply Company focused on Networks and Security.” Source: RevenueBase Database · checked Sep 27, 2026
2	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
3	Torrid Networks Limited	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	32 contacts →
	Strong evidence “Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff…” Source: RevenueBase Database · checked Sep 27, 2026
4	Toro Solutions	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	23 contacts →
	Indirect evidence “Toro was founded on creating the UK's first Red Team penetration test - and then attacking hundreds of clients by hacking their systems, influencing / social engineering staff and…” Source: RevenueBase Database · checked Sep 27, 2026
5	NGS Next Generation Security	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
6	th4ts3cur1ty.company	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	18 contacts →
	Partial evidence “th4ts3cur1ty.company supplies cyber security services internationally.” Source: RevenueBase Database · checked Sep 27, 2026
7	Sinevis	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	17 contacts →
	Partial 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 27, 2026
8	Hacker Academy	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	15 contacts →
	Indirect evidence “We Help Your Company Culture to Have a Successful Cybersecurity Posture.” Source: RevenueBase Database · checked Sep 27, 2026
9	Goallsecure	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	13 contacts →
	Indirect evidence “In today’s world, cyber threats are complex and multilayered, so complete protection is not achievable through a single solution or product, that's why GoAllSecure provides a 360°…” Source: RevenueBase Database · checked Sep 27, 2026
10	Gardpass Consulting & Space	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	12 contacts →
	Indirect evidence “Empowering enterprises to thrive through.expert staffing, strategic consultancy & innovative solutions.” Source: RevenueBase Database · checked Sep 27, 2026
11	Cyber Armed Security	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	12 contacts →
	Partial evidence “At Cyber Armed Security, we protect organisations worldwide from evolving cyber threats through intelligence-driven ethical hacking.” Source: RevenueBase Database · checked Sep 27, 2026
12	Pentiq	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	10 contacts →
	Strong evidence “We are a UK-based Cyber Security company offering a comprehensive portfolio specialising in innovative solutions for Penetration Testing, Training, Compliance, Consulting, and…” Source: RevenueBase Database · checked Sep 27, 2026
13	Coc00n Cyber	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	8 contacts →
	Indirect evidence “coc00n secures the personal devices of high-value and high-interest individuals against cyber attacks.” Source: RevenueBase Database · checked Sep 27, 2026
14	Stratia Cyber	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
15	Kloudwerk	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	7 contacts →
	Strong evidence “Kloudwerk offers a game-changing approach to cyber security consulting for SMEs.” Source: RevenueBase Database · checked Sep 27, 2026
16	Wilbourne	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	6 contacts →
	Partial evidence “Wilbourne is a cyber security consultancy who specialise in delivering bespoke attack simulations, GRC services, incident response and awareness training to help prevent…” Source: RevenueBase Database · checked Sep 27, 2026
17	Foresight Cyber	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	5 contacts →
	Partial evidence “Foresight Cyber is a boutique UK reseller of cyber security product licences.” Source: RevenueBase Database · checked Sep 27, 2026
18	Grove Group	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	3 contacts →
	Indirect evidence “Grove unlocks business success by defending our customers with the most advanced cybersecurity solutions in the market place today.” Source: RevenueBase Database · checked Sep 27, 2026
19	Dark Taurus	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	3 contacts →
	Indirect evidence “Dark Taurus are an innovative UK based Cybersecurity Solutions and Advisory company at the forefront of Risk Prevention and Risk Management.” Source: RevenueBase Database · checked Sep 27, 2026
20	HMH Security Consultants	Strong evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
21	The 5gs	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “We are a decentralized, ad-hoc, technology-specific, time-limited creative agency focused entirely on solving your 5G needs and challenges.” Source: RevenueBase Database · checked Sep 27, 2026
22	Fortnet UK	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Indirect evidence “There is a growing need for affordable impartial advice to recommend the most appropriate products to meet the customers short, medium and long term requirements whilst keeping…” Source: RevenueBase Database · checked Sep 27, 2026
23	Sesseto Limited	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
24	Centilon LTD	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
25	Netscylla Cyber Security LTD	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “Netscylla Cyber Security is a small start-up providing cyber security expertise, specialising in cyber security, offensive security, incident response and consultancy.” Source: RevenueBase Database · checked Sep 27, 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: 5g 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 5g security consulting companies.
Partial evidence: Its own public description names part of 5g 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 5g 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 112 5g security consulting companies based in London, United Kingdom

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5g security consulting companies based in London, United Kingdom at a glance

As of Sep 27, 2026

8.7%Verified-email coverage

23.2%Mobile-number coverage

19.9Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 30.0d

1010–30

9031–60

361–90

090–180

0180+

Company record updated

Median 90.0d

00–30

34131–60

79261–90

98990–180

108180+

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 5g 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 “5g 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 5g 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 5g 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, 194 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 27, 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.

5g security consulting companies by metro in the United Kingdom

5g security consulting companies in London112

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 5g 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 5g security consulting companies are there based in London, United Kingdom?

RevenueBase identified 112 5g 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?

Sytel Reply, headquartered in London, tops this list with the largest team on record.

Which city has the most 5g security consulting companies?

London leads with 112 headquartered companies, followed by Manchester (12) and Cheltenham (6).

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 194 verified decision-maker contacts tracked across these 112 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 27, 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.