Company lists · Data refreshed August 2026

Top 25 Cloud security consulting companies based in the United Kingdom

Name: Cloud security consulting companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 1,049 companies tracked

RevenueBase identified 1,049 cloud security consulting companies headquartered in the United Kingdom as of August 2026 and tracks 34,960 professional contacts across them, including 3,560 with verified work emails and 1,081 with mobile numbers. London is the largest hub.

This list covers cloud security consulting companies headquartered in the 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

1,049Companies

34,960Contacts tracked

3,560Verified emails

1,081Mobile numbers

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The 25 largest cloud security consulting companies based in the United Kingdom

Ranked by team size

Top 25 of 1,049 cloud security consulting companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to cloud security consulting companies: 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	Sourcefuse	Indirect evidence	London, United Kingdom	501-1,000	669 contacts →
	Indirect evidence “SourceFuse is a global, AI-native digital and product engineering company that helps enterprises build, modernize, and scale intelligent systems.” Source: RevenueBase Database · checked Aug 31, 2026
2	Devoteam Google Cloud Partner	Partial evidence	London, United Kingdom	501-1,000	546 contacts →
	Partial evidence “Devoteam is a Diamond Tier Partner in the Google Cloud Services Partner Path and a Managed Services Provider.” Source: RevenueBase Database · checked Aug 31, 2026
3	Iomart	Partial evidence	Glasgow, United Kingdom	201-500	422 contacts →
	Partial evidence “Iomart combines cutting-edge cloud technology with deep industry expertise to help organisations transform with confidence.” Source: RevenueBase Database · checked Aug 31, 2026
4	BUI	Strong evidence	Derby, United Kingdom	51-200	250 contacts →
	Strong evidence “BUI is an award-winning global technology consultancy delivering cloud, security, networking and managed services from offices in South Africa, East Africa, the United Kingdom…” Source: RevenueBase Database · checked Aug 31, 2026
5	Proact IT Group AB	Partial evidence	Leeds, United Kingdom	1,001-5,000	224 contacts →
	Partial evidence “Proact is a leading IT expert helping customers secure business critical data via best in class hybrid cloud solutions.” Source: RevenueBase Database · checked Aug 31, 2026
6	Risk Associates - Emea & Asia	Partial evidence	London, United Kingdom	51-200	169 contacts →
	Partial evidence “Ensuring your business is handling cyber security risks effectively has never been more important.” Source: RevenueBase Database · checked Aug 31, 2026
7	Cloud Direct	Partial evidence	United Kingdom	51-200	168 contacts →
	Partial evidence “Cloud Direct is a leading Microsoft Partner that helps organisations realise the true value of artificial intelligence and position themselves as Agent-Ready Enterprises.” Source: RevenueBase Database · checked Aug 31, 2026
8	Cyberfort	Partial evidence	Thatcham, United Kingdom	51-200	160 contacts →
	Partial evidence “At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Source: RevenueBase Database · checked Aug 31, 2026
9	Cloudsmiths	Partial evidence	London, United Kingdom	51-200	150 contacts →
	Partial evidence “CloudSmiths is a technology consultancy specialising in data analytics, machine learning, software development, AI and business reporting in the cloud.” Source: RevenueBase Database · checked Aug 31, 2026
10	Cybersec Consulting	Strong evidence	London, United Kingdom	201-500	141 contacts →
	Strong evidence “CyberSec Consulting, headquartered in the UAE and serving the iMETA market, is a distinguished professional Cyber Security and Consulting services company.” Source: RevenueBase Database · checked Aug 31, 2026
11	Trpglobal	Indirect evidence	London, United Kingdom	51-200	123 contacts →
	Indirect evidence “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: RevenueBase Database · checked Aug 31, 2026
12	RDX	Partial evidence	London, United Kingdom	501-1,000	110 contacts →
	Partial evidence “Navisite is a modern managed cloud service provider that accelerates IT transformation for thousands of growing and established global brands.” Source: RevenueBase Database · checked Aug 31, 2026
13	Caretower An Integrity360 Company	Partial evidence	London, United Kingdom	201-500	97 contacts →
	Partial 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 Aug 31, 2026
14	Sysgroup	Partial evidence	London, United Kingdom	51-200	88 contacts →
	Partial evidence “SysGroup is the services leader for realising AI transformation, as an award-winning managed IT services, cloud hosting, and IT consultancy provider.” Source: RevenueBase Database · checked Aug 31, 2026
15	Virtual IT LTD	Partial evidence	Laindon, United Kingdom	51-200	79 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Aug 31, 2026
16	Saepio Information Security	Partial evidence	High Wycombe, United Kingdom	51-200	73 contacts →
	Partial evidence “Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Source: RevenueBase Database · checked Aug 31, 2026
17	Instant On IT	Strong evidence	London, United Kingdom	51-200	69 contacts →
	Strong evidence “Helping businesses accomplish more IT Management, Strategy and Cloud, IT Security and AI Solutions Office locations: Central London, New Zealand” Source: RevenueBase Database · checked Aug 31, 2026
18	Tuliptech	Partial evidence	Leicester, United Kingdom	51-200	68 contacts →
	Partial evidence “TulipTech drives progress through unmatched Cloud Migration & Management capabilities, DevOps, NetOps, and SecOps.” Source: RevenueBase Database · checked Aug 31, 2026
19	Cogeco Peer 1	Indirect evidence	Southampton, United Kingdom	501-1,000	67 contacts →
	Indirect evidence “Cogeco Peer 1 has changed its name to Aptum Technologies.” Source: RevenueBase Database · checked Aug 31, 2026
20	Nimbus	Partial evidence	Stratford-Upon-Avon, United Kingdom	51-200	63 contacts →
	Partial evidence “We design, develop and deliver business transformation through the power of the cloud Knowing how and where to invest in digital opportunities is vital to the growth of any…” Source: RevenueBase Database · checked Aug 31, 2026
21	Evalian	Indirect evidence	Worcester, United Kingdom	51-200	61 contacts →
	Indirect evidence “Many organisations are dealing with multiple frameworks, overlapping tools, disconnected ownership, and increasing pressure from regulators, customers, and boards.” Source: RevenueBase Database · checked Aug 31, 2026
22	Cloudplexo	Partial evidence	London, United Kingdom	51-200	60 contacts →
	Partial evidence “CloudPlexo helps businesses unlock the power of the cloud.” Source: RevenueBase Database · checked Aug 31, 2026
23	Northdoor PLC	Indirect evidence	London, United Kingdom	51-200	59 contacts →
	Indirect evidence “Northdoor is an award-winning London-based IT consultancy and managed services provider with over 30 years’ experience.” Source: RevenueBase Database · checked Aug 31, 2026
24	Cyberlab	Partial evidence	Lincoln, United Kingdom	51-200	56 contacts →
	Partial evidence “CyberLab is the UK-leading cyber security consultancy and managed services provider, trusted by over 1,200 enterprise businesses, government departments, and household names to…” Source: RevenueBase Database · checked Aug 31, 2026
25	Somerford Associates Limited	Partial evidence	Swindon, United Kingdom	51-200	56 contacts →
	Partial evidence “Somerford Associates has certified and security cleared consultants who build and integrate bespoke platforms that significantly reduce risks and drive productivity across a broad…” Source: RevenueBase Database · checked Aug 31, 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: cloud security consulting companies. 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 cloud security consulting companies.
Partial evidence: Its own public description names part of cloud security consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud security consulting companies. 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 1,049 cloud security consulting companies based in the United Kingdom

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

As of Aug 31, 2026

10.2%Verified-email coverage

3.1%Mobile-number coverage

33.3Average contacts per company

1-10Median size (employees)

42.4%Largest-city concentration · London

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

680

11-50

264

51-200

201-500

501-1,000

1,001-5,000

10001+

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 cloud security consulting companies, 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 the United Kingdom whose own description of what they do matches “cloud security consulting companies”. 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 cloud security consulting companies), 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 cloud security consulting companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 3,560 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 August 31, 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.

Cloud security consulting companies by metro

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 cloud security consulting companies, 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 cloud security consulting companies are there based in the United Kingdom?

RevenueBase identified 1,049 cloud security consulting companies headquartered in the United Kingdom as of August 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?

Sourcefuse, headquartered in London, tops this list with the largest team on record.

Which city has the most cloud security consulting companies?

London leads with 445 headquartered companies, followed by Manchester (35) and Leeds (16).

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 3,560 verified decision-maker contacts tracked across these 1,049 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.