Company lists · Data refreshed October 2026

Top 25 Cyberdefense technology providers based in London, United Kingdom

Name: Cyberdefense technology providers based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 385 companies tracked

RevenueBase identified 385 company matches for cyberdefense technology providers associated with London, United Kingdom as of October 2026 and tracks 9,027 professional contacts across them, including 2,988 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for cyberdefense technology providers associated with London, United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 11, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 11, 2026 How this list was built

385Companies

9,027Contacts tracked

2,988Verified emails

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The 25 largest cyberdefense technology providers based in London, United Kingdom

Ranked by team size

Top 25 of 385 company matches for cyberdefense technology providers based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Mimecast	Exact match	London, United KingdomHQ recorded Oct 11, 2026	1,001-5,000	2,337 contacts →
	Exact match “organizations.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	Obrela	Exact match	London, United KingdomHQ recorded Oct 11, 2026	201-500	249 contacts →
	Exact match “Obrela Security Industries is a global provider of cyber security services.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3	Gorilla Technology Group	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	217 contacts →
	Exact match “Headquartered in London U.K, Gorilla is a global solution provider in Security Intelligence, Network Intelligence, Business Intelligence and IoT technology.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4	Deepcytes Cyber Labs UK	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	162 contacts →
	Exact match “Whether you’re a business or an individual, digital threats to your precious data and assets can come in any form - external or internal.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5	RED Sift	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	106 contacts →
	Exact match “Red Sift enables organizations to anticipate, respond to, and recover from cyber attacks while continuing to operate effectively.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6	Cyberone	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	106 contacts →
	Exact match “CyberOne is a Microsoft Security Elite Partner and one of only 100 global Microsoft partners recognised with Microsoft-Verified Managed XDR solution status.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Conosco	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	102 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	Titania LTD	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	97 contacts →
	Exact match “Dedicated to securing the networks society depends on.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9	Glasswall	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	92 contacts →
	Exact match “Glasswall is a zero-trust cybersecurity company eliminating file-based threats at the source.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10	ITC Secure	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	87 contacts →
	Exact match “ITC Secure is an advisory-led cyber security services company.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11	Threatspike	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	82 contacts →
	Exact match “ThreatSpike is the world's first AI-managed IT and security platform, replacing the legacy MSP model entirely.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	White HAT An Epam Company	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	77 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	Becrypt	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	71 contacts →
	Exact match “With a heritage of creating National Cyber Security Centre certified products, Becrypt, a Leonardo company, is a trusted provider of endpoint cybersecurity software solutions.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14	Covertswarm	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	67 contacts →
	Exact match “YOU DESERVE TO BE HACKED®.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	Cybersmart	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	64 contacts →
	Exact match “Cybersecurity should be simple.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Cyro Cyber	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	64 contacts →
	Exact match “Cyro Cyber are your cyber security Guardians.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	Cyberowl	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	62 contacts →
	Exact match “CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	Hexegic	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	61 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19	Intruder	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	60 contacts →
	Exact match “Intruder's continuous exposure management platform helps security, IT, and engineering teams stop breaches before they start.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	Bulletproof Cyber Security	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	60 contacts →
	Exact match “Bulletproof is now part of WorkNest Secure.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Garrison NOW A Part Of Everfox	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	58 contacts →
	Exact match “Garrison is a London-based cybersecurity company founded in 2014 by David Garfield (CEO) and Henry Harrison (Chief Scientist).” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Riversafe	Exact match	London, United KingdomHQ recorded Oct 11, 2026	11-50	54 contacts →
	Exact match “We deliver services in Cybersecurity, Application Security and DevOps and are trusted by some of the world’s leading brands to maximise the value of their security investments and…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Redscan, A Kroll Business	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	52 contacts →
	Exact match “Redscan is an award-winning provider of managed security services, specialising in Managed Detection and Response, Penetration Testing and Red Teaming.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	Cyber Heals	Exact match	London, United KingdomHQ recorded Oct 11, 2026	11-50	49 contacts →
	Exact match “In the ever-evolving landscape of cyber threats, Cyber Heals stands out.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	RED Team Partners	Exact match	London, United KingdomHQ recorded Oct 11, 2026	51-200	48 contacts →
	Exact match “Our Red Team security consultants are elite technical experts with worldwide Red Team service experience, and a respected reputation of delivering red team services for SME’s.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “cyberdefense technology providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 385 cyberdefense technology providers based in London, United Kingdom

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Cyberdefense technology providers based in London, United Kingdom at a glance

As of Oct 11, 2026

33.1%Verified-email coverage

23.4Average contacts per company

11-50Median size (employees)

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

186

11-50

138

51-200

201-500

501-1,000

1,001-5,000

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 385 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with London, United Kingdom whose business descriptions match “cyberdefense technology providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,988 professional contacts with verified work emails across the full matched dataset. 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 October 11, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Cyberdefense technology providers by metro in the United Kingdom

Cyberdefense technology providers in Manchester31

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cyberdefense technology providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cyberdefense technology providers are there based in London, United Kingdom?

RevenueBase identified 385 company matches for cyberdefense technology providers associated with London, United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Mimecast tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United Kingdom has the most cyberdefense technology providers?

London leads the United Kingdom with 385 company records, followed by Manchester (31) and Birmingham (20).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,988 professional contacts with verified work emails tracked across these 385 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 11, 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 SmartSearch, 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.