Company lists · Data refreshed September 2026

Top 25 Cybersecurity investment firms based in the United Kingdom

Name: Cybersecurity investment firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 174 companies tracked

RevenueBase identified 174 company matches for cybersecurity investment firms associated with the United Kingdom as of September 2026 and tracks 2,429 professional contacts across them, including 920 with verified work emails. London is the largest hub.

This list covers company matches for cybersecurity investment firms associated with the 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 September 28, 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 Sep 28, 2026 How this list was built

174Companies

2,429Contacts tracked

920Verified emails

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The 25 largest cybersecurity investment firms based in the United Kingdom

Ranked by team size

Top 25 of 174 company matches for cybersecurity investment firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Securityhq	Exact match	London, United KingdomHQ recorded Sep 28, 2026	501-1,000	502 contacts →
	Exact match “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Performanta	Exact match	Maidenhead, United KingdomHQ recorded Sep 28, 2026	51-200	156 contacts →
	Exact match “Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Cybersmart	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	84 contacts →
	Exact match “Cybersecurity should be simple.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Foregenix	Exact match	Swindon, United KingdomHQ recorded Sep 28, 2026	51-200	80 contacts →
	Exact match “When your business relies on security, compliance and a strong reputation for taking care of your customers, you need a partner that understands your ethos, your challenges and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Hexegic	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	52 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 · Sep 28, 2026 · View company records in RevenueBase
6	Cyberq Group	Exact match	Birmingham, United KingdomHQ recorded Sep 28, 2026	51-200	42 contacts →
	Exact match “CyberQ Group is an award-winning, venture-backed, and globally accredited [ISO27K and CREST] cybersecurity leader dedicated to bridging the "protection gap" for high-stakes…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Amadeus Capital Partners	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	39 contacts →
	Exact match “Since 1997, Amadeus Capital Partners has backed more than 200 pioneering companies and raised over $1.3 billion to fuel their growth.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	CCL	Exact match	Belsize Park, United KingdomHQ recorded Sep 28, 2026	11-50	38 contacts →
	Exact match “A community comprised of cybersecurity leaders and experts, with exposure to early-stage (Seed/ Series A) start-ups and innovation, access to private investment opportunities…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Cyberis	Exact match	Tewkesbury, United KingdomHQ recorded Sep 28, 2026	11-50	34 contacts →
	Exact match “Cyberis are pioneers in customer-focussed information security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	defense.com	Exact match	Stevenage, United KingdomHQ recorded Sep 28, 2026	51-200	32 contacts →
	Exact match “Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Trident Search	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	32 contacts →
	Exact match “Your partner in cyber security talent, investment and events.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Torrid Networks Limited	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	32 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Cyb3r	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	32 contacts →
	Exact match “CYB3R Group, is a leading provider of comprehensive Cyber Security, IT and Communications Solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Procheckup PCU	Exact match	Portsmouth, United KingdomHQ recorded Sep 28, 2026	11-50	29 contacts →
	Exact match “Imagine a world where cyber threats are simply another challenge that you're fully equipped to handle.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	C5 Capital	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	24 contacts →
	Exact match “C5 Capital is a specialist Venture Capital Firm focused on cybersecurity, space and energy security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	4secure LTD	Exact match	Northampton, United KingdomHQ recorded Sep 28, 2026	11-50	23 contacts →
	Exact match “4Secure is a trusted provider of software defined, cross-network/cross-domain cybersecurity solutions for commercial, government and defence.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	CYPRO	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	21 contacts →
	Exact match “Secure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Hexiosec	Exact match	Cheltenham, United KingdomHQ recorded Sep 28, 2026	11-50	18 contacts →
	Exact match “Hexiosec is the new name for Red Maple Technologies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	th4ts3cur1ty.company	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	18 contacts →
	Exact match “th4ts3cur1ty.company supplies cyber security services internationally.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Barefoot Cyber	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	16 contacts →
	Exact match “Barefoot Cyber is the strategic partner for senior leaders who recognize that a cybersecurity attack is not just a technical failure, but a direct threat to their revenue…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Cyberhive	Exact match	Newbury, United KingdomHQ recorded Sep 28, 2026	11-50	16 contacts →
	Exact match “CyberHive protects the most valued organisations, their people data, and assets, with patented technology that is simple, secure and performant.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Everycloud AI & Data Security	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	14 contacts →
	Exact match “Demand more from your AI & Data Security partner.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Aspiron Search	Exact match	Bournemouth, United KingdomHQ recorded Sep 28, 2026	11-50	14 contacts →
	Exact match “Aspiron Search is a niche-focused Cybersecurity search firm that works exclusively with venture-backed Cybersecurity firms placing Technical & GTM talent into North America.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Xpertex LTD	Exact match	Welwyn Garden City, United KingdomHQ recorded Sep 28, 2026	11-50	13 contacts →
	Exact match “Xpertex has been at the cutting edge of cyber security development since 2006.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Quantum Group	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	12 contacts →
	Exact match “Quantum Group is a leading fintech and security investment incubator based in London.” Recorded in the RevenueBase company graph · Sep 28, 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 “cybersecurity investment firms”. 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 174 cybersecurity investment firms based in the United Kingdom

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Cybersecurity investment firms based in the United Kingdom at a glance

As of Sep 28, 2026

37.9%Verified-email coverage

14.0Average contacts per company

1-10Median size (employees)

48.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 174 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 the United Kingdom whose business descriptions match “cybersecurity investment firms” 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 920 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 September 28, 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.

Cybersecurity investment firms by metro

Cybersecurity investment firms in London85

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 “cybersecurity investment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity investment firms are there based in the United Kingdom?

RevenueBase identified 174 company matches for cybersecurity investment firms associated with the United Kingdom as of September 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?

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

Which city has the most cybersecurity investment firms?

London leads with 85 company records, followed by Manchester (6) and Birmingham (5).

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 920 professional contacts with verified work emails tracked across these 174 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 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 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.