Company lists · Data refreshed September 2026

Top 25 Security posture management companies based in the United Kingdom

RevenueBase identified 1,051 security posture management companies headquartered in the United Kingdom as of September 2026 and tracks 12,633 professional contacts across them, including 3,608 with verified work emails and 674 with mobile numbers. London is the largest hub.

This list covers security posture management 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, how directly it supports the match, and when it was last checked. Data refreshed September 6, 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 HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
1,051Companies
12,633Contacts tracked
3,608Verified emails
674Mobile numbers
Explore all 1,051 companies → Free signup · no credit card · 500 free credits

The 25 largest security posture management companies based in the United Kingdom

Ranked by team size
Top 25 of 1,051 security posture management companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names security posture management companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
COBRAPartial evidence
London, United KingdomHQ checked Sep 6, 2026n/a705

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

Source: company website · checked Sep 6, 2026
2
SecurityhqPartial evidence
London, United KingdomHQ checked Sep 6, 2026501-1,000502

SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.”

Source: company website · checked Sep 6, 2026
3
Ward SecurityPartial evidence
London, United KingdomHQ checked Sep 6, 20261,001-5,000419

“Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…”

Source: company website · checked Sep 6, 2026
4
ObrelaPartial evidence
London, United KingdomHQ checked Sep 6, 2026201-500242

“Obrela Security Industries is a global provider of cyber security services.”

Source: company website · checked Sep 6, 2026
5
Guarding UKIndirect evidence
Enfield, United KingdomHQ checked Sep 6, 2026501-1,000166

“We are GUK.”

Source: company website · checked Sep 6, 2026
6
CyberfortPartial evidence
Thatcham, United KingdomHQ checked Sep 6, 202651-200159

“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: company website · checked Sep 6, 2026
7
PerformantaPartial evidence
Maidenhead, United KingdomHQ checked Sep 6, 202651-200156

“Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.”

Source: company website · checked Sep 6, 2026
8
LOGIQPartial evidence
Bradley Stoke, United KingdomHQ checked Sep 6, 2026201-500143

“Logiq is a UK-based cyber security consultancy and secure managed services provider supporting defence, government, and critical national infrastructure (CNI) organisations where…”

Source: company website · checked Sep 6, 2026
9
Khipu NetworksPartial evidence
Fleet, United KingdomHQ checked Sep 6, 202651-200125

“KHIPU Networks is an award winning international Cyber Security Company delivering a wide range of network, wireless and security solutions, technologies and services across…”

Source: company website · checked Sep 6, 2026
10
Bulletproof Cyber SecurityIndirect evidence
London, United KingdomHQ checked Sep 6, 202651-200123

“Bulletproof is now part of WorkNest Secure.”

Source: company website · checked Sep 6, 2026
11Watford, United KingdomHQ checked Sep 6, 202651-200116

“TSP has a reputation for providing enterprise security solutions, as well as excellent system integration standards and exceptional aftercare support, since its founding in 1988.”

Source: company website · checked Sep 6, 2026
12
Guardforce Security LimitedIndirect evidence
Hornchurch, United KingdomHQ checked Sep 6, 2026501-1,000111

“We are a well-established company that supplies specialist Close Protection, Door Supervisor services to Private Individuals, Visiting Royal Families, Government Officials…”

Source: company website · checked Sep 6, 2026
13
Appcheck LTDPartial evidence
Leeds, United KingdomHQ checked Sep 6, 202651-20099

“AppCheck is a Complete Enterprise Security Testing Solution that provides up to the minute vulnerability coverage for your entire estate.”

Source: company website · checked Sep 6, 2026
14
Sep2Partial evidence
Leeds, United KingdomHQ checked Sep 6, 202651-20095

“SEP2 is an award-winning UK-based cyber security specialist service provider, powered by a dedicated team of experts available 24/7/365.”

Source: company website · checked Sep 6, 2026
15
Titania LTDPartial evidence
London, United KingdomHQ checked Sep 6, 202651-20088

“Dedicated to securing the networks society depends on.”

Source: company website · checked Sep 6, 2026
16
Wavenet CyberguardPartial evidence
Stourport-on-severn, United KingdomHQ checked Sep 6, 2026201-50086

“CyberGuard Technologies is the security division of Wavenet.”

Source: company website · checked Sep 6, 2026
17
Amethyst Risk ManagementPartial evidence
Basingstoke, United KingdomHQ checked Sep 6, 202611-5085

“Amethyst Risk Management is a leading cybersecurity consultancy supplying expert services and support to the UK Government, Defence, Operators of Essential Services, and the…”

Source: company website · checked Sep 6, 2026
18
Reliance CyberIndirect evidence
Waterloo, United KingdomHQ checked Sep 6, 202651-20080

“At Reliance Cyber, we believe in truly partnering with our customers.”

Source: company website · checked Sep 6, 2026
19
CNLStrong evidence
Camberley, United KingdomHQ checked Sep 6, 202651-20079

“Control Center is trusted by the best-informed security operations around the world to provide proactive physical security management for mission-critical command and control.”

Source: company website · checked Sep 6, 2026
20High Wycombe, United KingdomHQ checked Sep 6, 202651-20074

“Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.”

Source: company website · checked Sep 6, 2026
21
Dionach By NomiosPartial evidence
Oxford, United KingdomHQ checked Sep 6, 202651-20073

“Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.”

Source: company website · checked Sep 6, 2026
22
Black Onyx ConceptsPartial evidence
Stoke-on-trent, United KingdomHQ checked Sep 6, 202651-20071

“MITIGATING THREATS TO YOUR BUSINESS • We offer an array of security support services aligned to individual client requirements and reflective of our holistic, systematic and…”

Source: company website · checked Sep 6, 2026
23
CovertswarmIndirect evidence
London, United KingdomHQ checked Sep 6, 202651-20064

“YOU DESERVE TO BE HACKED®.”

Source: company website · checked Sep 6, 2026
24
NormcyberPartial evidence
Fareham, United KingdomHQ checked Sep 6, 202651-20064

“Established in 2015, NormCyber is a multi-award-winning cyber security specialist, on a mission to provide organisations with complete visibility and total control over cyber risk.”

Source: company website · checked Sep 6, 2026
25
Talk Straight GroupPartial evidence
Ilkley, United KingdomHQ checked Sep 6, 202611-5062

“Talk Straight has been looking after the communications and network security for thousands of public and private sector organisations since 2007.”

Source: company website · checked Sep 6, 2026

Showing 25 of 1,051 security posture management companies based in the United Kingdom

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Security posture management companies based in the United Kingdom at a glance

As of Sep 6, 2026
1-10Median size (employees)
LondonLargest hub · 402 HQs
674Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
569
11-50
325
51-200
117
201-500
24
501-1,000
9
1,001-5,000
4
10001+
1

Verified emails by last verification

0–30
3,335
31–60
249
61–90
3
90–180
0
180+
21

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 security posture management companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “security posture management companies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among security posture management 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 an evidence 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, 3,608 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 6, 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.

Security posture management companies by metro

  • Security posture management companies in London402
  • Security posture management companies in Manchester31

Frequently asked

How many security posture management companies are there based in the United Kingdom?

RevenueBase identified 1,051 security posture management companies 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 security posture management companies?

London leads with 402 headquartered companies, followed by Manchester (31) and Birmingham (17).

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 3,608 verified decision-maker contacts tracked across these 1,051 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 6, 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.