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Top Cyber Security Companies in the UK
Last updated:02 Oct 2025
Created by
Surfe
| Views:
6
Market context behind this list
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Annual Revenue
Company Growth
Team Growth
Location
| Companies | Key Contacts | Annual Revenue | Funding | Company Growth | Management Team Growth | Hiring Status | Tech Stack | HQ Location | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 
The SecOps Group
Cloud Security
|
24
|
Cyber Security Consultant, Senior Consultant, Security Consultant
|
+27
|
$100-500M
|
|
⏸️ No Growth: 0%
24 Employees
|
⏸️ No Growth: 0%
1 Employees
|
Not Hiring
|
37
|
Cambridge, United Kingdom
|
|
| 2 | 
PSA Certified
Cyber Security
|
4
|
Board Member
|
+1
|
$100-500M
|
|
⏸️ No Growth: 0%
4 Employees
|
⏸️ No Growth: 0%
2 Employees
|
Not Hiring
|
11
|
Cambridge, United Kingdom
|
|
| 3 | 
CompliancePath an Ideagen company
Compliance
|
19
|
Senior Account Executive, Software Assurance Specialist, Advisory Consultant
|
+24
|
$50-100M
|
|
⏸️ No Growth: 0%
19 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
25
|
Glasgow, United Kingdom
|
|
| 4 | 
Astra
Identity Management
|
8
|
Senior Frontend Developer, Head of Marketing, Software Engineer
|
+15
|
$100-500M
|
|
📊 Modest Growth: 14.29%
7 ↗ 8 Employees
|
⏸️ No Growth: 0%
3 Employees
|
Not Hiring
|
8
|
London, United Kingdom
|
|
| 5 | 
Broker Back Office
Information Technology
|
1
|
Insurance Agent, Broker di vendita
|
+2
|
$100-500M
|
|
⏸️ No Growth: 0%
1 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
7
|
Herne Bay, United Kingdom
|
|
| 6 | 
Project Insecurity
Internet
|
1
|
Security Analyst, Chief Executive Officer
|
+2
|
$100-500M
|
|
⏸️ No Growth: 0%
1 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
22
|
Covent Garden, United Kingdom
|
|
| 7 | 
Crest
Cyber Security
|
78
|
Assistant, Digital Communications Manager, Project Manager
|
+72
|
$100-500M
|
|
⏸️ No Growth: 0%
78 Employees
|
⏸️ No Growth: 0%
7 Employees
|
Not Hiring
|
39
|
London, United Kingdom
|
|
| 8 | 
Knights Group Security
Consulting
|
116
|
Security Officer, Security Supervisor, Steward
|
>100
|
$50-100M
|
|
⏸️ No Growth: 0%
116 Employees
|
⏸️ No Growth: 0%
3 Employees
|
Not Hiring
|
25
|
Surrey Heath, United Kingdom
|
|
| 9 | 
PwnDefend
Cyber Security
|
1
|
CHIEF HECKING OFFICER
|
+1
|
$100-500M
|
|
⏸️ No Growth: 0%
1 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
23
|
London, United Kingdom
|
|
| 10 | 
Enterprise Times
Information Technology
|
2
|
Editor, Project Manager, Editor
|
+3
|
$100-500M
|
|
⏸️ No Growth: 0%
2 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
26
|
St Leonards, United Kingdom
|
|
| 11 | 
Chaleit
Cloud Security
|
17
|
Security Researcher, VP Technical Services, VP Of Technical Services
|
+15
|
$100-500M
|
|
⏸️ No Growth: 0%
17 Employees
|
⏸️ No Growth: 0%
4 Employees
|
Not Hiring
|
29
|
London, United Kingdom
|
|
| 12 | 
Mass
Information Technology
|
224
|
adm, employer, Software Engineer
|
>100
|
$100-500M
|
|
⏸️ No Growth: 0%
224 Employees
|
⏸️ No Growth: 0%
1 Employees
|
Actively Hiring
|
20
|
Huntingdonshire, United Kingdom
|
|
| 13 | 
Smiths Detection
Security
|
1,807
|
Global Data Governance Analyst, Planner, Development Scientist
|
>100
|
$100-500M
|
|
📊 Modest Growth: 0.22%
1,803 ↗ 1,807 Employees
|
⏸️ No Growth: 0%
16 Employees
|
Actively Hiring
|
17
|
City of London, United Kingdom
|
|
| 14 | 
Corsearch
Cyber Security
|
1,023
|
Research Analyst, Product Owner, Brand Protection Analyst
|
>100
|
$500-1,000M
|
|
📉 Negative Growth: -0.39%
1,027 ↘ 1,023 Employees
|
⏸️ No Growth: 0%
21 Employees
|
Actively Hiring
|
22
|
City of London, United Kingdom
|
|
| 15 | 
Darktrace
Cyber Security
|
2,237
|
Senior UX Designer, Solutions Engineer, solution enginneer manager
|
>100
|
$100-500M
|
|
📊 Modest Growth: 0.49%
2,226 ↗ 2,237 Employees
|
⏸️ No Growth: 0%
47 Employees
|
Actively Hiring
|
18
|
Cambridge, United Kingdom
|
|
| 16 | 
Iomart
Cloud Computing
|
295
|
IT Consultant, INSIDE SALES CONSULTANT, Datacentre Ops Senior Systems Engineer
|
>100
|
$100-500M
|
|
⏸️ No Growth: 0%
295 Employees
|
⏸️ No Growth: 0%
8 Employees
|
Actively Hiring
|
8
|
Glasgow, United Kingdom
|
|
| 17 | 
Iq in It
Consulting
|
6
|
IT Technician, Third Line Support Engineer, 1st Line Support Field Engineer
|
+13
|
$100-500M
|
|
⏸️ No Growth: 0%
6 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
32
|
Kingston Upon Thames, United Kingdom
|
|
| 18 | 
Ncc Group
Cyber Security
|
1,244
|
Projectmanager, Verification Scheduler, imprenditore
|
>100
|
$100-500M
|
|
📉 Negative Growth: -0.64%
1,252 ↘ 1,244 Employees
|
⏸️ No Growth: 0%
15 Employees
|
Actively Hiring
|
28
|
Chicago, United States
|
|
| 19 | 
NCSC Cyber Accelerator
Cyber Security
|
56
|
Engagement Manager, Analista informatico, Cyber Security Engineer
|
>100
|
$100-500M
|
|
⏸️ No Growth: 0%
56 Employees
|
⏸️ No Growth: 0%
2 Employees
|
Not Hiring
|
6
|
City of London, United Kingdom
|
|
| 20 | 
Softline International
Information Technology
|
980
|
Head of Business Analysis, Руководитель проекта, Senior Java Software Engineer
|
+28
|
$100-500M
|
|
📉 Negative Growth: -0.31%
983 ↘ 980 Employees
|
⏸️ No Growth: 0%
28 Employees
|
Actively Hiring
|
8
|
Москва, Russia
|
|
| 21 | 
Egress Software Technologies
Cloud Security
|
185
|
Hardware Engineer, Principal Data Engineer, Tech Lead Data Intelligence Platform, Assistant
|
>100
|
$50-100M
|
Series C,
12-18-2018
|
📉 Negative Growth: -2.12%
189 ↘ 185 Employees
|
⏸️ No Growth: 0%
6 Employees
|
Not Hiring
|
17
|
London, United Kingdom
|
|
| 22 | 
Redscan
Network Security
|
58
|
Senior Vice President, Head of Deployment Engineering, SOC Analyst Level 2, Associate Principal - Security Operations Centre Analyst
|
+48
|
$100-500M
|
|
📊 Modest Growth: 3.57%
56 ↗ 58 Employees
|
⏸️ No Growth: 0%
5 Employees
|
Not Hiring
|
21
|
London, United Kingdom
|
|
| 23 | 
ISIO - International Security Industry Organization
Risk Management
|
4
|
Affiliate, 12 chez ISIO - International Security Industry Organization, Principal Partner & Accredited Trainer/Examiner for HIM (Human Investigation Management)
|
+5
|
$500-1,000M
|
|
⏸️ No Growth: 0%
4 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
30
|
United Kingdom
|
|
| 24 | 
RigNet
Analytics
|
164
|
Hvac Technician/ Forman
|
+1
|
$100-500M
|
|
📉 Negative Growth: -0.61%
165 ↘ 164 Employees
|
⏸️ No Growth: 0%
6 Employees
|
Not Hiring
|
29
|
Westhill, United Kingdom
|
|
| 25 | 
Way To the Web
Information Technology
|
1
|
Information Technology Department, It, Director
|
+3
|
$500-1,000M
|
|
⏸️ No Growth: 0%
1 Employees
|
⏸️ No Growth: 0%
1 Employees
|
Not Hiring
|
31
|
READING, United Kingdom
|
|
| 26 | 
Encore.io - Attack Surface Management ASM
Cyber Security
|
6
|
Developer, Developer, Senior Developer
|
+3
|
$100-500M
|
|
⏸️ No Growth: 0%
6 Employees
|
⏸️ No Growth: 0%
1 Employees
|
Not Hiring
|
28
|
Maidenhead, United Kingdom
|
|
| 27 | 
Secure Frontline Services
Physical Security
|
7
|
Receptionist, Doorman, Door Supervisor
|
+9
|
$100-500M
|
|
⏸️ No Growth: 0%
7 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
26
|
City of London, United Kingdom
|
|
| 28 | 
ZeroSSL
Cyber Security
|
5
|
Customer Success, Lead Product Manager, Software Engineer
|
+5
|
$100-500M
|
|
⏸️ No Growth: 0%
5 Employees
|
⏸️ No Growth: 0%
1 Employees
|
Not Hiring
|
13
|
London, United Kingdom
|
|
| 29 | 
The Cyber Hut
Information Technology
|
|
Part time advisor, Cyber Security and Identity & Access Management
|
+1
|
$100-500M
|
|
⏸️ No Growth: 0%
Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
25
|
Manchester, United Kingdom
|
|
| 30 | 
PrivacySavvy
Internet
|
14
|
Content Writer, Content Writer $ Editor, Writer
|
+4
|
$500-1,000M
|
|
⏸️ No Growth: 0%
14 Employees
|
⏸️ No Growth: 0%
Employees
|
Not Hiring
|
17
|
City of London, United Kingdom
|
|
| 31 | 
Cohort Plc
Security
|
10
|
Co-Chairman, Principal Consultant, Military Engineer Information and Projects
|
+39
|
$100-500M
|
Post-IPO Equity,
11-20-2024
|
⏸️ No Growth: 0%
10 Employees
|
⏸️ No Growth: 0%
2 Employees
|
Not Hiring
|
15
|
Theale, United Kingdom
|
|
| 32 | 
Total Security Services
Security
|
563
|
Security Officer, Self Employed, Security Officer
|
>100
|
$50-100M
|
|
📉 Negative Growth: -0.71%
567 ↘ 563 Employees
|
⏸️ No Growth: 0%
5 Employees
|
Not Hiring
|
23
|
London, United Kingdom
|
|
| 33 | 
Synectics
Security
|
117
|
Sales Manager, Junior Inside Sales Executive, Operations Planner
|
>100
|
$50-100M
|
|
📉 Negative Growth: -1.68%
119 ↘ 117 Employees
|
⏸️ No Growth: 0%
2 Employees
|
Actively Hiring
|
11
|
Sheffield, United Kingdom
|
|
| 34 | 
Janes
National Security
|
424
|
Senior Analyst - Military Insight, Head of Events, Correspondent
|
>100
|
$100-500M
|
|
⏸️ No Growth: 0%
424 Employees
|
⏸️ No Growth: 0%
19 Employees
|
Actively Hiring
|
24
|
London, United Kingdom
|
|
| 35 | 
Amazing Support
IT Management
|
97
|
Técnico de operações, tecnico mdf, supervisor
|
>100
|
$100-500M
|
|
📉 Negative Growth: -1.02%
98 ↘ 97 Employees
|
⏸️ No Growth: 0%
3 Employees
|
Not Hiring
|
19
|
Hertsmere, United Kingdom
|
|
| 36 | 
Mti
Consulting
|
217
|
Field Technician, Account Executive, Project Manager
|
>100
|
$100-500M
|
|
⏸️ No Growth: 0%
217 Employees
|
⏸️ No Growth: 0%
9 Employees
|
Actively Hiring
|
41
|
Staines-upon-Thames, United Kingdom
|
|
| 37 | 
Cybit
Cyber Security
|
79
|
Account Director - Public Sector - Central Govt, Defence, NHS, Police, Local Govt & Education, prepress tech, Project Coordinator
|
>100
|
$100-500M
|
|
📉 Negative Growth: -2.47%
81 ↘ 79 Employees
|
⏸️ No Growth: 0%
7 Employees
|
Actively Hiring
|
20
|
Newcastle upon Tyne, United Kingdom
|
|
| 38 | 
Hack The Box
Cyber Security
|
1,359
|
CTF, CTF Player / Academy Student, CTF player
|
>100
|
$100-500M
|
Series B,
01-11-2023
|
📉 Negative Growth: -0.73%
1,369 ↘ 1,359 Employees
|
⏸️ No Growth: 0%
6 Employees
|
Actively Hiring
|
17
|
Folkestone, United Kingdom
|
|
| 39 | 
TryHackMe
Cyber Security
|
1,850
|
Level 4, TryHackMe Virtual Machines, CTF Player
|
>100
|
$100-500M
|
|
📉 Negative Growth: -0.96%
1,868 ↘ 1,850 Employees
|
⏸️ No Growth: 0%
3 Employees
|
Actively Hiring
|
32
|
London, United Kingdom
|
|
| 40 | 
G4S
Security
|
27,059
|
segurança, S/O, Supervisor
|
>100
|
$>1,000M
|
Post-IPO Equity,
08-28-2013
|
📉 Negative Growth: -0.53%
27,204 ↘ 27,059 Employees
|
📉 Negative Growth: -0.44%
453 ↘ 451 Employees
|
Actively Hiring
|
15
|
City of London, United Kingdom
|
|
| 41 | 
Sophos
Cloud Security
|
3,452
|
Senior Global Escalation Engineer 3, Senior Software Development Engineer (Test) 2, Manager - Global Purchasing
|
>100
|
$500-1,000M
|
Post-IPO Equity,
08-24-2021
|
📉 Negative Growth: -0.49%
3,469 ↘ 3,452 Employees
|
📉 Negative Growth: -2.44%
41 ↘ 40 Employees
|
Actively Hiring
|
14
|
Abingdon, United Kingdom
|
|
| 42 | 
Mimecast
Cyber Security
|
1,968
|
QA Engineer, Senior Director- Data Science, Solutions Architect
|
>100
|
$100-500M
|
Post-IPO Equity,
10-31-2017
|
📉 Negative Growth: -0.46%
1,977 ↘ 1,968 Employees
|
📉 Negative Growth: -4.17%
24 ↘ 23 Employees
|
Actively Hiring
|
15
|
London, United Kingdom
|
|
| 43 | 
Onecom
Cloud Computing
|
420
|
Enterprise Account Manager, New Business Executive, Customer Support Advisor
|
>100
|
$100-500M
|
Private Equity Round,
07-22-2019
|
📊 Modest Growth: 0.72%
417 ↗ 420 Employees
|
📉 Negative Growth: -16.67%
6 ↘ 5 Employees
|
Actively Hiring
|
30
|
Fareham, United Kingdom
|