Company lists · Data refreshed September 2026

Top 25 Oil and gas cybersecurity companies based in the United Kingdom

Name: Oil and gas cybersecurity companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 141 companies tracked

RevenueBase identified 141 oil and gas cybersecurity companies headquartered in the United Kingdom as of September 2026 and tracks 4,209 professional contacts across them, including 1,214 with verified work emails and 598 with mobile numbers. London is the largest hub.

This list covers oil and gas cybersecurity 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 5, 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 5, 2026 86% judged on-target in blind review

141Companies

4,209Contacts tracked

1,214Verified emails

598Mobile numbers

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The 25 largest oil and gas cybersecurity companies based in the United Kingdom

Ranked by team size

Top 25 of 141 oil and gas cybersecurity companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names oil and gas cybersecurity 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.
#	Company	Headquarters	Employees	Contacts
1	SecurityhqPartial evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	502
	“SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: company website · checked Sep 5, 2026
2	BridewellIndirect evidence	Reading, United KingdomHQ checked Sep 5, 2026	201-500	303
	“Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Source: company website · checked Sep 5, 2026
3	ObrelaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	242
	“Obrela Security Industries is a global provider of cyber security services.” Source: company website · checked Sep 5, 2026
4	SapphireIndirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 5, 2026	51-200	168
	“Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Source: company website · checked Sep 5, 2026
5	CyberfortIndirect evidence	Thatcham, United KingdomHQ checked Sep 5, 2026	51-200	159
	“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 5, 2026
6	Reliance CyberIndirect evidence	Waterloo, United KingdomHQ checked Sep 5, 2026	51-200	80
	“At Reliance Cyber, we believe in truly partnering with our customers.” Source: company website · checked Sep 5, 2026
7	CyberowlIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	52
	“CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Source: company website · checked Sep 5, 2026
8	HexegicIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	52
	“At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Source: company website · checked Sep 5, 2026
9	Adarma SecurityIndirect evidence	Edinburgh, United KingdomHQ checked Sep 5, 2026	201-500	51
	“We are Adarma, independent leaders in detection and response services.” Source: company website · checked Sep 5, 2026
10	Satisnet, A Gamma CompanyIndirect evidence	Luton, United KingdomHQ checked Sep 5, 2026	51-200	45
	“Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Source: company website · checked Sep 5, 2026
11	Barrier NetworksPartial evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	11-50	34
	“We are your strategic cybersecurity partner – going beyond traditional models to deliver agile, expert-led protection tailored to the needs of regulated industries and critical…” Source: company website · checked Sep 5, 2026
12	defense.comIndirect evidence	Stevenage, United KingdomHQ checked Sep 5, 2026	51-200	32
	“Defense.com is transforming the way businesses manage cyber security by allowing them to easily identify, prioritise and remediate threats.” Source: company website · checked Sep 5, 2026
13	Intrinsic SecurityPartial evidence	Peterborough, United KingdomHQ checked Sep 5, 2026	51-200	32
	“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: company website · checked Sep 5, 2026
14	TekgemIndirect evidence	Sedgefield, United KingdomHQ checked Sep 5, 2026	11-50	26
	“Tekgem bridges the gap between Information Technology (IT) and Operational Technology (OT).” Source: company website · checked Sep 5, 2026
15	AMR CybersecurityPartial evidence	Cheltenham, United KingdomHQ checked Sep 5, 2026	11-50	23
	“AMR CyberSecurity delivers next generation cyber security services to assist organisations across a wide variety of sectors in understanding potential threats and effectively…” Source: company website · checked Sep 5, 2026
16	Blue Cube Security LTDIndirect evidence	East Grinstead, United KingdomHQ checked Sep 5, 2026	11-50	22
	“Blue Cube Security is a trusted UK cyber security partner with over 25 years of experience helping organisations stay secure in an increasingly complex digital world.” Source: company website · checked Sep 5, 2026
17	Cyber EnergiaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	20
	“Cyber Energia – Your Comprehensive Cyber Security Solution for a smart & sustainable energy market Cyber Energia is a dynamic managed security service provider offering OT / SCADA…” Source: company website · checked Sep 5, 2026
18	ClearswiftIndirect evidence	Berkshire, United KingdomHQ checked Sep 5, 2026	201-500	19
	“Why Clearswift?” Source: company website · checked Sep 5, 2026
19	Infosec K2kPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	18
	“Infosec K2K safeguards your organisation’s most valuable assets with tailored cybersecurity solutions.” Source: company website · checked Sep 5, 2026
20	SinevisPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	17
	“We are a leading cybersecurity services organization with more than a decade of proven expertise in consulting, solution implementation and managed services.” Source: company website · checked Sep 5, 2026
21	OPTECPartial evidence	Towcester, United KingdomHQ checked Sep 5, 2026	1-10	16
	“We specialise in delivering end-to-end cybersecurity solutions and services designed to proactively protect your business.” Source: company website · checked Sep 5, 2026
22	Lrqa NettitudeIndirect evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	201-500	15
	“Best penetration testing service - Teiss Awards 2024 Managed cloud service winner - Stratus Awards 2023 Security vendor of the year - Computing security excellence awards 2023…” Source: company website · checked Sep 5, 2026
23	Datasixth ConsultingPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	15
	“Who We Are DataSixth delivers Cybersecurity Intelligence.” Source: company website · checked Sep 5, 2026
24	GoallsecureIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	13
	“In today’s world, cyber threats are complex and multilayered, so complete protection is not achievable through a single solution or product, that's why GoAllSecure provides a 360°…” Source: company website · checked Sep 5, 2026
25	Socguardians LTDPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	13
	“Our mission at SOCGuardians is to empower organizations to operate confidently in a digital world by providing cutting-edge cybersecurity services.” Source: company website · checked Sep 5, 2026

Showing 25 of 141 oil and gas cybersecurity companies based in the United Kingdom

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Oil and gas cybersecurity companies based in the United Kingdom at a glance

As of Sep 5, 2026

11-50Median size (employees)

LondonLargest hub · 68 HQs

598Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

1,120

31–60

61–90

90–180

180+

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 oil and gas cybersecurity 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 “oil and gas cybersecurity 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 oil and gas cybersecurity 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, 1,214 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 5, 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.

Oil and gas cybersecurity companies by metro

Oil and gas cybersecurity companies in London68

Frequently asked

How many oil and gas cybersecurity companies are there based in the United Kingdom?

RevenueBase identified 141 oil and gas cybersecurity 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?

Securityhq, headquartered in Gb, tops this list with the largest team on record.

Which city has the most oil and gas cybersecurity companies?

London leads with 68 headquartered companies, followed by Manchester (6) and Glasgow (3).

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 1,214 verified decision-maker contacts tracked across these 141 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 5, 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.