Company lists · Data refreshed September 2026

Top 25 Cybersecurity consulting associations based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 482 companies tracked

RevenueBase identified 482 cybersecurity consulting associations headquartered in London, United Kingdom as of September 2026 and tracks 7,301 professional contacts across them, including 1,448 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers cybersecurity consulting associations 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 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

482Companies

7,301Contacts tracked

1,448Verified emails

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The 25 largest cybersecurity consulting associations based in London, United Kingdom

Ranked by team size

Top 25 of 482 cybersecurity consulting associations based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity consulting associations: 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	S-Rm	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	351 contacts →
	Indirect evidence “S-RM is a global intelligence and cyber security consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
2	Obrela	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	242 contacts →
	Indirect evidence “Obrela Security Industries is a global provider of cyber security services.” Source: RevenueBase Database · checked Sep 28, 2026
3	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 28, 2026
4	CREST	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	118 contacts →
	Indirect evidence “CREST is an international not-for-profit, membership body representing the global cyber security industry.” Source: RevenueBase Database · checked Sep 28, 2026
5	Conosco	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	105 contacts →
	Partial evidence “Cybersecurity specialists providing technology and telecoms solutions that gives you the leadership, experience and resilience you need to build and secure the future of work.” Source: RevenueBase Database · checked Sep 28, 2026
6	Caretower An Integrity360 Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	97 contacts →
	Indirect 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
7	ITC Secure	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	87 contacts →
	Indirect evidence “ITC Secure is an advisory-led cyber security services company.” Source: RevenueBase Database · checked Sep 28, 2026
8	White HAT An Epam Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	77 contacts →
	Indirect evidence “White Hat, part of the EPAM group, is an award-winning cyber intelligence and offensive security company that leverages an attacker’s perspective to shape innovative, proactive…” Source: RevenueBase Database · checked Sep 28, 2026
9	Covertswarm	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	64 contacts →
	Indirect evidence “YOU DESERVE TO BE HACKED®.” Source: RevenueBase Database · checked Sep 28, 2026
10	Cyro Cyber	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	62 contacts →
	Indirect evidence “Cyro Cyber are your cyber security Guardians.” Source: RevenueBase Database · checked Sep 28, 2026
11	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
12	Hexegic	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Source: RevenueBase Database · checked Sep 28, 2026
13	Istari	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Partial evidence “ISTARI is a global cybersecurity firm, established by Temasek in 2020, with a unique model for helping clients build cyber resilience.” Source: RevenueBase Database · checked Sep 28, 2026
14	UK Cyber Security Council	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	46 contacts →
	Indirect evidence “The UK Cyber Security Council is the charitable self-regulatory body for the UK cyber security profession.” Source: RevenueBase Database · checked Sep 28, 2026
15	Secalliance	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	41 contacts →
	Indirect evidence “SecAlliance delivers cyber threat intelligence services to banks, central banks, financial market infrastructures, governmental and EU agencies, international organisations, and…” Source: RevenueBase Database · checked Sep 28, 2026
16	E-Crime & Cybersecurity Congress Events Series	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	41 contacts →
	Partial evidence “AKJ Associates is renowned for creating the globes most prestigious cybersecurity networks and meetings.” Source: RevenueBase Database · checked Sep 28, 2026
17	Secforce LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
18	Chartered Institute Of Information Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	38 contacts →
	Indirect evidence “The Chartered Institute of Information Security (CIISec) is the only pure-play information security institution to have been granted Royal Charter status and is dedicated to…” Source: RevenueBase Database · checked Sep 28, 2026
19	Trident Search	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “Your partner in cyber security talent, investment and events.” Source: RevenueBase Database · checked Sep 28, 2026
20	Torrid Networks Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial 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 28, 2026
21	Cyber Rescue Alliance	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	29 contacts →
	Indirect evidence “Cyber Rescue is a leading specialist in helping Boardroom Executives to measure, monitor and mitigate potential harm from cyber-attacks.” Source: RevenueBase Database · checked Sep 28, 2026
22	J2 Mssp	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “Cyber security is the modern business' greatest risk.” Source: RevenueBase Database · checked Sep 28, 2026
23	Toro Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
24	Kiris Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Source: RevenueBase Database · checked Sep 28, 2026
25	Templar Executives	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	21 contacts →
	Indirect evidence “Templar Executives is an award winning, international Cyber Security advisory services and solutions company operating at the highest levels across the public and private sectors.” 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: cybersecurity consulting associations. 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 cybersecurity consulting associations.
Partial evidence: Its own public description names part of cybersecurity consulting associations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity consulting associations. 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 482 cybersecurity consulting associations based in London, United Kingdom

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Cybersecurity consulting associations based in London, United Kingdom at a glance

As of Sep 28, 2026

19.8%Verified-email coverage

15.1Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

292

11-50

140

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 482 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 cybersecurity consulting associations, 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 “cybersecurity consulting associations”. 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 cybersecurity consulting associations), 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 cybersecurity consulting associations, 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, 1,448 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.

Cybersecurity consulting associations by metro in the United Kingdom

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 cybersecurity consulting associations, 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 cybersecurity consulting associations are there based in London, United Kingdom?

RevenueBase identified 482 cybersecurity consulting associations 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?

S-Rm, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most cybersecurity consulting associations?

London leads the United Kingdom with 482 headquartered companies, followed by Manchester (41) and Birmingham (27).

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 1,448 verified decision-maker contacts tracked across these 482 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.