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Tech Hiring Rankings

UK's Most Popular Security Companies

The UK's most popular Security companies of Summer 2026 that are actively hiring engineers.

#
Company
Open jobs
Headcount
Overall popularity
Calculated based on total number of applications received compared with all companies in Summer ’26.
1
Atos
London, UK · Consultancy
Trusted partner for your Digital Journey.
40 jobs
5001+
Top 2%
2
Risk Ledger
London, UK · Computer and Network Security
Enhancing Trust + Security in the global Supply Chain.
2 jobs
51 - 200
Top 4%
3
Darktrace
Cambridge, UK · Computer and Network Security
Helping over 9,000 organizations worldwide minimize cyber disruption.
17 jobs
1001 - 5000
Top 7%
4
Leonardo
London, UK · Manufacturing
Global high-tech player in Aerospace, Defence and Security.
167 jobs
5001+
Top 7%
5
Nasstar
Dorset, UK · Consultancy
Managed service specialist.
8 jobs
501 - 1000
Top 9%
6
QinetiQ
Hampshire, UK · Engineering
Create It. Test It. Use It.
29 jobs
5001+
Top 10%
7
TryHackMe
London, UK · EdTech
Hands-on cyber security training through real-world scenarios.
4 jobs
1001 - 5000
Top 11%
8
NCC Group
Manchester, UK · Consultancy
At the heart of cyber innovation - helping to make the world safer and more secure
19 jobs
1001 - 5000
Top 11%
9
PortSwigger
Knutsford, UK · Software Development
PortSwigger is a web security company on a mission to enable the world to secure the web.
4 jobs
201 - 500
Top 16%
10
Rowden
Bristol, UK · Engineering
Building the UK’s next generation engineering powerhouse, providing critical technology for national resilience.
16 jobs
51 - 200
Top 17%
11
Mickai
London, UK · Machine Learning and AI
British Sovereign Intelligence Operating System. On-device, post-quantum signed. 104 UK patent applications filed.
8 jobs
1 - 10
Top 18%
12
Roke
Romsey, UK · Engineering
We're improving the world through innovation, bringing the physical & digital together to revolutionise industries.
6 jobs
501 - 1000
Top 18%
13
Voop
London, UK · Internet
Voop’s mission is to protect vulnerable children in social care and foster care from harm on smartphones.
1 job
11 - 50
Top 23%
14
Always Further
London, UK · Computer and Network Security
New Threat Model New Paradigm We're Defining It
2 jobs
1 - 10
Top 24%
15
Nominet
Oxford, UK · Cloud and Infrastructure
5 jobs
201 - 500
Top 25%
16
TwinStream
Cheltenham, UK · Computer and Network Security
A Cyber Security Startup specialising in Cross Domain Solutions.
1 job
51 - 200
Top 26%
17
Advania Company
London, UK · Consultancy
The tech company with people at heart.
15 jobs
1001 - 5000
Top 28%
18
Valarian
London, UK · Computer and Network Security
Innovating for the new era of digital sovereignty
2 jobs
11 - 50
Top 30%
19
ThreatAware
London, UK · Computer and Network Security
Know Every Device. Eliminate Exposure.
3 jobs
11 - 50
Top 32%
20
Thermoteknix
Cambridge, UK · Hardware
Designer and manufacturer of thermal imaging systems for defence, security, aerospace, and industrial applications.
6 jobs
51 - 200
Top 33%
21
Sophos
Oxfordshire, UK · Computer and Network Security
Cybersecurity as a service.
6 jobs
5001+
Top 34%
22
Netcraft
London, UK · Security
To protect the world from cybercrime
4 jobs
201 - 500
Top 34%
23
Becrypt
London, UK · Computer and Network Security
Becrypt is a leading supplier of end-user device security products and services.
5 jobs
51 - 200
Top 36%
24
CybSafe
London, UK · Computer and Network Security
The human risk management platform
1 job
11 - 50
Top 40%
25
Detego Global
London, UK · Computer and Network Security
Digital Forensics, Case Management, Endpoint Monitoring, Professional Digital Forensics and Security Services.
3 jobs
51 - 200
Top 41%
26
iProov
London, UK · Identity and Access
Right person. Real person. Right now.
9 jobs
201 - 500
Top 42%
27
Mimecast
London, UK · Computer and Network Security
Advanced Email and Collaboration Security
11 jobs
1001 - 5000
Top 42%
28
Bridewell
London, UK · Computer and Network Security
Cyber Security. Where it Matters.
10 jobs
201 - 500
Top 44%
29
Komcept Solutions Limited
Northamptonshire, UK · Security
Global specialists in bespoke security & intelligence solutions - helping to secure you today and protect your tomorrow.
2 jobs
11 - 50
Top 45%
30
Quantum Base
Lancaster, UK · Computer and Network Security
Quantum Security Solutions that are simple, practical, 100% secure and on a nano-scale
1 job
11 - 50
Top 46%
31
Wavenet
Solihull, UK · Telecomms
Simplifying technology, amplifying success.
7 jobs
1001 - 5000
Top 47%
32
Trustonic
Cambridge, UK · Computer and Network Security
World-leading trusted technology
5 jobs
51 - 200
Top 52%
33
Encompass Corporation
London, UK · RegTech
The full picture, fast.
2 jobs
51 - 200
Top 59%
34
PCI Pal
London, UK · Payments
Global provider of cloud-based, secure payments solutions. Descoping organisations from the requirements of PCI DSS.
4 jobs
51 - 200
Top 61%
35
Nexor
Nottingham, UK · Computer and Network Security
Secure Information Exchange Specialists
6 jobs
51 - 200
Top 61%
36
Cyber Fraud Centre
Edinburgh, UK · Computer and Network Security
The Cyber and Fraud Centre ensures Scottish organisations are resilient as they can be against cyber and fraud crime.
1 job
11 - 50
Top 63%
37
Protection Group International
London, UK · Computer and Network Security
We build long-range digital resilience using technology-supported human insight.
5 jobs
51 - 200
Top 65%
38
Vindex Systems
Crawley, UK · Security
Delivering electronic security and intelligent vehicle management solutions
20 jobs
11 - 50
Top 66%
39
Acora - Managed IT Services
West Sussex, UK · Consultancy
Uniting IT and Security Operations.
6 jobs
501 - 1000
Top 67%
40
Kocho
London, UK · Security
Become greater.
1 job
201 - 500
Top 68%
41
Prevail Partners Limited
London, UK · Security
Prevail are Mission Enablers; Innovative Problem Solvers; and provide penetrative Insights and Investigations.
1 job
51 - 200
Top 70%
42
InfoSum
London, UK · Data
Reclaim your data destiny. Build better customer experiences.
1 job
51 - 200
Top 71%

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