Company lists · Data refreshed September 2026

Top 25 Iot security assessment services based in the United Kingdom

Name: Iot security assessment services 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 413 companies tracked

RevenueBase identified 413 iot security assessment services headquartered in the United Kingdom as of September 2026 and tracks 4,558 professional contacts across them, including 1,102 with verified work emails. London is the largest hub.

This list covers iot security assessment services 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 September 28, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

413Companies

4,558Contacts tracked

1,102Verified emails

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The 25 largest iot security assessment services based in the United Kingdom

Ranked by team size

Top 25 of 413 iot security assessment services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to iot security assessment services: 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	COBRA	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	705 contacts →
	Strong evidence “Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Source: RevenueBase Database · checked Sep 28, 2026
2	Sapphire	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 28, 2026	51-200	168 contacts →
	Indirect evidence “Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Source: RevenueBase Database · checked Sep 28, 2026
3	Cyberfort	Partial evidence	Thatcham, United KingdomHQ checked Sep 28, 2026	51-200	159 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 Sep 28, 2026
4	Caretower An Integrity360 Company	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	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 Sep 28, 2026
5	Dionach By Nomios	Partial evidence	Oxford, United KingdomHQ checked Sep 28, 2026	51-200	73 contacts →
	Partial evidence “Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
6	Trevonix	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	68 contacts →
	Indirect evidence “Trevonix is the trusted partner for businesses seeking secure, seamless, and scalable Identity and Access Management (IAM) solutions.” Source: RevenueBase Database · checked Sep 28, 2026
7	MDSEC	Partial evidence	Macclesfield, United KingdomHQ checked Sep 28, 2026	11-50	61 contacts →
	Partial evidence “MDSec are a UK based consultancy with a passion for information security.” Source: RevenueBase Database · checked Sep 28, 2026
8	Threatspike	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	61 contacts →
	Partial evidence “ThreatSpike is the world's first AI-managed IT and security platform, replacing the legacy MSP model entirely.” Source: RevenueBase Database · checked Sep 28, 2026
9	Cyberlab	Partial evidence	Alderley Edge, United KingdomHQ checked Sep 28, 2026	51-200	57 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 Sep 28, 2026
10	Secarma LTD	Indirect evidence	Manchester, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Secarma exists to keep the world safe.” Source: RevenueBase Database · checked Sep 28, 2026
11	Redhunt Labs	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “RedHunt Labs is a research-driven cybersecurity company delivering Continuous Threat Exposure Management (CTEM), PTaaS, and AI Exposure Security.” Source: RevenueBase Database · checked Sep 28, 2026
12	Ergos UK	Indirect evidence	Crawley, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence “ERGOS is an award-winning IT Managed Service Provider.” Source: RevenueBase Database · checked Sep 28, 2026
13	The Secops Group	Indirect evidence	Cambridge, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “Pentesting Exams by Pentesting Experts.” Source: RevenueBase Database · checked Sep 28, 2026
14	defense.com	Partial evidence	Stevenage, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial evidence “Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.” Source: RevenueBase Database · checked Sep 28, 2026
15	Device Authority	Strong evidence	Reading, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Strong evidence “Device Authority enables end to end cyber resilience for connected devices through the discovery, visibility and automated security of large IoT/OT deployments.” Source: RevenueBase Database · checked Sep 28, 2026
16	Aristi	Partial evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Aristi is a specialist provider of cyber security services with over 17 years of experience.” Source: RevenueBase Database · checked Sep 28, 2026
17	Intrinsic Security	Strong evidence	Peterborough, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Strong evidence “Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…” Source: RevenueBase Database · checked Sep 28, 2026
18	Omnicyber Security	Partial evidence	Solihull, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
19	Citation Cyber	Partial evidence	Lancaster, United KingdomHQ checked Sep 28, 2026	11-50	30 contacts →
	Partial evidence “Cyber security can feel overwhelming.” Source: RevenueBase Database · checked Sep 28, 2026
20	Procheckup PCU	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “Imagine a world where cyber threats are simply another challenge that you're fully equipped to handle.” Source: RevenueBase Database · checked Sep 28, 2026
21	Cyber Security Specialists	Partial evidence	Altrincham, United KingdomHQ checked Sep 28, 2026	11-50	26 contacts →
	Partial evidence “Based in Manchester UK, we are an independent Cyber Security Consultancy providing Security services across a wide range of markets, from multi-national Corporate Organisations…” Source: RevenueBase Database · checked Sep 28, 2026
22	Cyberwhiz IOT Cyber Security	Strong evidence	Cheltenham, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “At CyberWhiz, we build next-generation IoT Cyber Security solutions across the three pillars of IoT, which are Edge·Mobile·Cloud.” Source: RevenueBase Database · checked Sep 28, 2026
23	I3secure LTD	Partial evidence	Bristol, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “i3Secure is a cyber security and information assurance consultancy protecting the confidentiality, integrity and availability of data across defence, public and private sectors.” Source: RevenueBase Database · checked Sep 28, 2026
24	Ssl247 A Sectigo Company	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	24 contacts →
	Partial evidence “SSL247 (A Sectigo Company) has nearly 20 years of security consulting experience operating in 18 different markets globally.” Source: RevenueBase Database · checked Sep 28, 2026
25	Cybercrowd	Strong evidence	Newbury, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Strong evidence “CyberCrowd are a market leader in the cyber security realm, offering everything from Assessment Services through to Pen Testing, CISOaaS, Certification Readiness, DPO services…” Source: RevenueBase Database · checked Sep 28, 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: iot security assessment services. 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 iot security assessment services.
Partial evidence: Its own public description names part of iot security assessment services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name iot security assessment services. 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 413 iot security assessment services based in the United Kingdom

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Iot security assessment services based in the United Kingdom at a glance

As of Sep 28, 2026

24.2%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

36.6%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

262

11-50

122

51-200

201-500

501-1,000

5,001-10,000

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 413 companies.

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 iot security assessment services, 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 “iot security assessment services”. 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 iot security assessment services), 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 iot security assessment services, 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, 1,102 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 September 28, 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.

Iot security assessment services by metro

Iot security assessment services in London151

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 iot security assessment services, 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 iot security assessment services are there based in the United Kingdom?

RevenueBase identified 413 iot security assessment services headquartered in the United Kingdom as of September 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?

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

Which city has the most iot security assessment services?

London leads with 151 headquartered companies, followed by Manchester (17) and Birmingham (10).

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 1,102 verified decision-maker contacts tracked across these 413 companies.

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 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.