Company lists · Data refreshed September 2026

Top 25 Cloud security assessment firms based in the United Kingdom

RevenueBase identified 116 company matches for cloud security assessment firms associated with the United Kingdom as of September 2026 and tracks 2,395 professional contacts across them, including 169 with verified work emails. London is the largest hub.

This list covers company matches for cloud security assessment 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 27, 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 27, 2026 How this list was built
116Companies
2,395Contacts tracked
169Verified emails
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The 25 largest cloud security assessment firms based in the United Kingdom

Ranked by team size
Top 25 of 116 company matches for cloud security assessment firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 27, 2026n/a705 contacts →

Exact match

“Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchSolihull, United KingdomHQ recorded Sep 27, 202611-5031 contacts →

Exact match

“SPECIALISTS IN IT SECURITY AND COMPLIANCE Our goal is to help customers define, develop and implement information security and compliance services, no matter what stage of the…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchNewbury, United KingdomHQ recorded Sep 27, 202611-5023 contacts →

Exact match

“CyberCrowd are a market leader in the cyber security realm, offering everything from Assessment Services through to Pen Testing, CISOaaS, Certification Readiness, DPO services…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchLeeds, United KingdomHQ recorded Sep 27, 202611-5019 contacts →

Exact match

“Halo I.S is not just another cybersecurity organization based in the UK; we're a testament to evolution and client-centric innovation.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5018 contacts →

Exact match

“Technology is changing faster than ever.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchChelmsford, United KingdomHQ recorded Sep 27, 2026201-50018 contacts →

Exact match

“Organisation focused on Cloud and Security”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5015 contacts →

Exact match

“is an ISO 9001:2015 and ISO/IEC 27001:2022 certified, DPIIT-recognized cybersecurity company delivering structured External Vulnerability Assessment & Penetration Testing (VAPT)…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5014 contacts →

Exact match

“Demand more from your AI & Data Security partner.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5010 contacts →

Exact match

“Hydras is a Digital & Cloud Transformation Consultancy that specialise in Cyber Security.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchOxford, United KingdomHQ recorded Sep 27, 202611-509 contacts →

Exact match

“skyPurple Cloud | Smarter Cloud.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-508 contacts →

Exact match

“Cyscale is a cloud-native security solution that constantly monitors your cloud environment.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-507 contacts →

Exact match

“Navigating Microsoft Cloud security shouldn't feel like walking through fog.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchAylesbury, United KingdomHQ recorded Sep 27, 202611-507 contacts →

Exact match

“Kelltron Consulting Services is a globally recognized cybersecurity consulting firm with a strong presence in the United Kingdom, United States, and India.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-107 contacts →

Exact match

“Threat Protect is a vendor-agnostic cybersecurity, compliance and AI governance partner based in London, working with organisations across finance, legal, energy, pharma…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchCranfield, United KingdomHQ recorded Sep 27, 202611-506 contacts →

Exact match

“Secure Debug: Your Full-Spectrum Cybersecurity Guardian!”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-106 contacts →

Exact match

“Mollis Group is an independent assurance consultancy.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchTewkesbury, United KingdomHQ recorded Sep 27, 20261-105 contacts →

Exact match

“Information security and compliance can be a challenging process across many areas and for many organisations.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-105 contacts →

Exact match

“Every engagement led by consultants with 10-20 years of offensive security experience.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchMilton Keynes, United KingdomHQ recorded Sep 27, 202611-505 contacts →

Exact match

“Keynes is an Information Technology consultancy company with a focus on providing secure cloud solutions for clients.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-505 contacts →

Exact match

“CM Security provides a Managed Service of Cloud Security and Protection combined with Professional Services from specialised professionals who’ll help you implement the right mix…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchGaerwen, United KingdomHQ recorded Sep 27, 20261-104 contacts →

Exact match

“Your Trusted CREST Certified Penetration Testing Partner.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-104 contacts →

Exact match

“Our team have helped 100's of organisations get the best out of their cloud solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-104 contacts →

Exact match

“Arco Cyber, now part of Sophos, helps security leaders move from point-in-time audits to always-on, evidence-based assurance.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-104 contacts →

Exact match

“We specialise in helping organisations identify security concerns and quantify the risks you may have across your assets, using Penetration Testing, Threat Simulation and…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchMaidstone, United KingdomHQ recorded Sep 27, 20261-104 contacts →

Exact match

“After spending over a decade working in the cyber security industry, I noticed that many organisations that once specialised in penetration testing were being bought out or had…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 116 cloud security assessment firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 169 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cloud security assessment firms based in the United Kingdom at a glance

As of Sep 27, 2026
7.1%Verified-email coverage
20.6Average contacts per company
1-10Median size (employees)
44.8%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
78
11-50
33
51-200
1
201-500
3
501-1,000
1

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 116 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 “cloud security assessment 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 169 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 27, 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.

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

How many cloud security assessment firms are there based in the United Kingdom?

RevenueBase identified 116 company matches for cloud security assessment 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?

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

Which city has the most cloud security assessment firms?

London leads with 52 company records, followed by Manchester (7) and Birmingham (3).

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 169 professional contacts with verified work emails tracked across these 116 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 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 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.