Company lists · Data refreshed November 2026

Top 23 Cloud security operations companies based in the United Kingdom

RevenueBase identified 233 company matches for cloud security operations companies associated with the United Kingdom as of November 2026 and tracks 9,082 professional contacts across them, including 3,940 with verified work emails. London is the largest hub.

This list covers company matches for cloud security operations companies 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 November 4, 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 Nov 4, 2026 How this list was built
233Companies
9,082Contacts tracked
3,940Verified emails
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The 23 largest cloud security operations companies based in the United Kingdom

Ranked by team size
Top 23 of 233 company matches for cloud security operations companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 4, 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 matchAbingdon, United KingdomHQ recorded Nov 4, 20265,001-10,0005,283 contacts →

Exact match

“Sophos, a global cybersecurity leader, defends more than organizations worldwide with Sophos Fusion, the industry's first and most complete AI-native cybersecurity defense system…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
2Exact matchGlasgow, United KingdomHQ recorded Nov 4, 2026201-500424 contacts →

Exact match

“Iomart combines cutting-edge cloud technology with deep industry expertise to help organisations transform with confidence.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 4, 202651-200108 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 · Nov 4, 2026 · View company records in RevenueBase
4Exact matchSouth & West Hampstead, United KingdomHQ recorded Nov 4, 202651-20085 contacts →

Exact match

“Virtual IT are a leading provider of cyber-secure cloud and managed IT services in the UK, entrusted by over 700 businesses and schools as their end-to-end technology partner.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
5Exact matchBournemouth, United KingdomHQ recorded Nov 4, 202651-20068 contacts →

Exact match

“We help businesses and individuals stay protected in an increasingly complex digital world.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 4, 202651-20068 contacts →

Exact match

“Civo is the Sovereign Cloud and AI platform that frees you to build without limits.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Nov 4, 202651-20059 contacts →

Exact match

“Bulletproof is now part of WorkNest Secure.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
8Exact matchPortsmouth, United KingdomHQ recorded Nov 4, 202651-20046 contacts →

Exact match

“We are on a mission to simplify and scale cyber security by combining AI, automation, expert-led services, in a unified platform: giving every organisation, from MSPs to global…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Nov 4, 202651-20046 contacts →

Exact match

“SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
10Exact matchCirencester, United KingdomHQ recorded Nov 4, 202611-5043 contacts →

Exact match

“We help organisations understand, optimise, and strengthen their cybersecurity.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
11Exact matchBrentford, United KingdomHQ recorded Nov 4, 202611-5043 contacts →

Exact match

“For over 20 years, we’ve helped businesses stay productive, secure and resilient through reliable IT support, modern cloud solutions and cyber security services designed for…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
12Exact matchDublin, United KingdomHQ recorded Nov 4, 202611-5042 contacts →

Exact match

“We are a pure play IT security company, which allows us to focus solely on protecting your business from cyber threats.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13Exact matchEdinburgh, United KingdomHQ recorded Nov 4, 2026201-50036 contacts →

Exact match

“We are Adarma, independent leaders in detection and response services.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
14Exact matchManchester, United KingdomHQ recorded Nov 4, 202611-5036 contacts →

Exact match

“Secure, compliant and resilient Cloud IT for legal, accounting, financial and professional service companies IT Farm helps you focus on the sustainability and long term growth of…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 4, 202651-20030 contacts →

Exact match

“OnApp makes cloud fast, easy & profitable for Telcos, MSPs & other cloud service providers.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
16Exact matchChelmsford, United KingdomHQ recorded Nov 4, 2026201-50029 contacts →

Exact match

“Organisation focused on Cloud and Security”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 4, 202651-20022 contacts →

Exact match

“Metal Cloud Infrastructure as a Service (IaaS) provider offering single tenant, on-demand environments built for high traffic websites, micro-services architectures, IoT & mobile…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Nov 4, 202611-5022 contacts →

Exact match

“Technology is changing faster than ever.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
19Exact matchSouthwark, United KingdomHQ recorded Nov 4, 202611-5020 contacts →

Exact match

“Award-winning BlockAPT is redefining cybersecurity with an AI-powered, autonomous, self-defending platform built to protect modern digital ecosystems at speed and scale.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
20Exact matchCheltenham, United KingdomHQ recorded Nov 4, 202611-5020 contacts →

Exact match

“CloudSecure delivers secure software and cloud systems for security-critical environments.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Nov 4, 202611-5019 contacts →

Exact match

“We help businesses simplify, modernise, and move forward with confidence in the cloud.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22Exact matchBristol, United KingdomHQ recorded Nov 4, 202611-5018 contacts →

Exact match

“We help organisations turn security, operations and log data into actionable intelligence - so monitoring platforms deliver real outcomes, not just dashboards.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
23Exact matchHadlow Down, United KingdomHQ recorded Nov 4, 202611-5018 contacts →

Exact match

“System Professional is one of the UK’s fastest-growing IT consultancies and cloud hosting providers.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase

Showing 23 of 233 cloud security operations companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 3,940 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cloud security operations companies based in the United Kingdom at a glance

As of Nov 4, 2026
43.4%Verified-email coverage
39.0Average contacts per company
11-50Median size (employees)
44.2%Largest-city concentration · London
Nov 4, 2026Page data refreshed

Companies by employee count

1-10
113
11-50
85
51-200
20
201-500
6
501-1,000
1
1,001-5,000
2
5,001-10,000
1
10001+
2

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 233 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 operations companies” 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 3,940 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 November 4, 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.

Cloud security operations companies by metro

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 operations companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cloud security operations companies are there based in the United Kingdom?

RevenueBase identified 233 company matches for cloud security operations companies associated with the United Kingdom as of November 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?

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

Which city has the most cloud security operations companies?

London leads with 103 company records, followed by Manchester (11) and Glasgow (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 3,940 professional contacts with verified work emails tracked across these 233 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 November 4, 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.