/ Pentest Directory

All the world's
pentest companies

Showing 5701-5799 of 7599 companies (Page 58 of 76)

Black Belt Security LLC

Black Belt Security LLC

Manual Penetration Testing
United Kingdom 9 employees

Cybersecurity consultancy based in the United Kingdom; specializes in penetration testing, vulnerability assessments, static code reviews, and cloud security with 9 employees, founded in 2019, and a focus on delivering premium security services.

Penetration Testing
Vulnerability Assessments
Security Code Reviews
+2 more
Redscan, A Kroll Business

Redscan, A Kroll Business

Web Application Pentesting
London, United Kingdom 58 employees

Cybersecurity company specializing in managed detection, penetration testing, and incident response; 42 employees, $11.5M revenue, founded 2002 in London, UK; provides explicit penetration testing services including web app testing and ethical hacking.

Managed Detection And Response
Penetration Testing
Red Teaming
+2 more
OALO Security

OALO Security

Web Application Pentesting
United Kingdom 2 employees

Cybersecurity company specializing in penetration testing for websites, mobile applications, and IT systems; founded in 2019 with 2 employees, headquartered in the United Kingdom. Focuses on vulnerability assessment and security improvement guidance.

Penetration Testing
Vulnerability Scanning
Security Consulting
Sentrium Security

Sentrium Security

Advanced Penetration Testing
Cheltenham, United Kingdom 7 employees

UK-based cybersecurity consultancy founded in 2018; 4 employees with 16.7% YoY growth; CREST-approved provider specializing in application, cloud, and penetration testing services, offering comprehensive vulnerability assessments and risk reduction.

Penetration Testing
Vulnerability Assessment
Cyber Security Advisory Services
BlackBox Pentesters

BlackBox Pentesters

Expert Penetration Testing
London, United Kingdom 7 employees

BlackBox Pentesters is a UK-based cybersecurity firm specializing in penetration testing and information security services; founded in 2025 with 3 employees, it emphasizes simplifying cybersecurity and offers services including red teaming, social engineering, physical, cloud, application, and wifi penetration testing.

Penetration Testing
Red Team Assessments
Social Engineering
+2 more
OnSecurity

OnSecurity

AI-Augmented Penetration Testi...
Bristol, United Kingdom 55 employees

Cybersecurity company specializing in penetration testing and security assessments; 34 employees; founded 2018; Bristol, UK; $14M funding; offers web, cloud, infrastructure testing, phishing, social engineering, physical penetration, and vulnerability scanning.

Crest-accredited Ai-augmented Penetration Testing
Continuous Vulnerability Scanning
Threat Intelligence
+4 more
SecQuest - a NCSC Assured Service Provider

SecQuest - a NCSC Assured Service Provider

Network Security Assessment
United Kingdom 14 employees

UK-based cybersecurity consultancy specializing in penetration testing and security assessments; offers CHECK & CREST services with a team of 9 employees; founded in 2012; provides network, application, and infrastructure security testing, with 7,422 monthly website visits and a global rank of 2,835,237.

Penetration Testing
Network Security Assessment
Application Security Assessment
+2 more
Appsecco

Appsecco

Kubernetes Penetration Testing
Other 6 employees

UK-based private cybersecurity company specializing in application and cloud security testing; 6 employees, founded 2015, last seed funding in 2016, with a focus on penetration testing, vulnerability assessments, and secure software development. They serve clients across industries with expert security testing and actionable insights.

Penetration Testing
Product Security Testing
Cloud Security
+1 more
FORTBRIDGE

FORTBRIDGE

Web Application Pentesting
London, United Kingdom 6 employees

Cybersecurity company specializing in penetration testing and security assessments; offers mobile, web, API, and network pentesting, cloud security review, red teaming, and security architecture; 5 employees; Founded 2020; London, UK.

Penetration Testing
Vulnerability Assessments
Security Consulting
+1 more
Carapace

Carapace

Web Application Pentesting
United Kingdom 5 employees

Cybersecurity company specializing in penetration testing and security assessments; offers external/internal network testing, wireless security, and physical security reviews; founded 2023; 5 employees; headquartered in United Kingdom.

Penetration Testing
Web Application Testing
Wireless Network Testing
+1 more
Forfend Information Security

Forfend Information Security

Infrastructure and Application...
Birmingham, United Kingdom 8 employees

Cybersecurity consultancy based in Birmingham, UK; 4 employees with 33.3% YoY growth since 2022; specializes in penetration testing, application security, and wireless network testing, emphasizing comprehensive support and client engagement.

Penetration Testing
Vulnerability Assessment
IT Health Checks
+5 more
Tradecraft

Tradecraft

Adversary Simulation
Other 4 employees

Tradecraft is a UK-based IT services and cybersecurity consultancy founded in 2017 with 4 employees; it specializes in adversary simulation and vulnerability exploitation, providing penetration testing-like security assessments. The company is registered in England & Wales (Company No. 10984430) and operates from London, with a focus on security testing and cyber defense services.

Adversary Simulation
Red-team Style Testing
Vulnerability Assessment
+1 more
XRAY CyberSecurity

XRAY CyberSecurity

Penetration Testing Services
Other 8 employees

UK-registered private cybersecurity firm specializing in penetration testing; offers external/internal network pentests, application testing, and social engineering; 6 employees; founded 2013; headquartered in London, UK; internationally certified with active social media presence.

Penetration Testing Including External And Internal Network Pentests
Application Pentests
Social Engineering Attacks
Akimbo Core

Akimbo Core

Web Application Pentesting
Blackpool, United Kingdom 5 employees

Akimbo Core is a UK-based cybersecurity firm founded in 2021, with 4 employees specializing in penetration testing, cybersecurity training, and consultancy; it has a growing online presence with 3,422 monthly visits and a global rank of #4,513,234.

Penetration Testing
Cybersecurity Training
Consultancy Services
Foregenix

Foregenix

Web Application Pentesting
Swindon, United Kingdom 93 employees

UK-based IT services and cybersecurity company specializing in penetration testing, forensics, and compliance; 60 employees, $9.9M revenue, founded 2009, headquartered in Swindon, UK; offers network, web, mobile, wireless, and cloud penetration testing services, with recent activity including collaborations and spin-outs.

Penetration Testing
Cybersecurity Compliance
Digital Forensics And Incident Response
+2 more
Cyndicate Labs

Cyndicate Labs

Red Team and Attack Simulation
Birmingham, United Kingdom 9 employees

UK-based cybersecurity consultancy specializing in penetration testing and red teaming; 6 employees with 28.6% YoY growth, founded in 2020, headquartered in Birmingham, UK. Offers web application testing, cyber scheme assessments, and cybersecurity consulting; 8,000 monthly website visits, ranked #2,039,956 globally.

Penetration Testing
Attack Simulation (red And Purple Teams)
Application Testing
+1 more
Pentest Limited

Pentest Limited

Web Application Penetration Te...
Altrincham, United Kingdom 31 employees

Cybersecurity company specializing in penetration testing, red teaming, and consultancy services; 21 employees, $9.7M annual revenue, founded 2001 in Altrincham, UK; offers tailored testing, compliance, workshops, and research activities, with a global web rank of #3,838,798 and 4,379 monthly visits.

Penetration Testing (web
Mobile
Infrastructure
+4 more
Circumvensys

Circumvensys

Vulnerability Assessment & Pen...
United Kingdom 2 employees

UK-based private cybersecurity firm specializing in penetration testing, vulnerability assessments, and managed security services; 2 employees with stable operations and a focus on network and application security testing.

Managed Detection And Response
Governance Risk And Compliance
Red Teaming And Phishing Simulation
+1 more
In.security

In.security

Infrastructure, Network, and A...
United Kingdom 3 employees

Cybersecurity consultancy based in the UK; specializes in penetration testing, red team testing, vulnerability assessments, and cybersecurity training; 3 employees; founded 2018; provides technical security testing and awareness services to organizations.

Penetration Testing
Vulnerability Assessments
Red Team Testing
+4 more
Trethtec Ltd

Trethtec Ltd

Pragmatic Penetration Testing
United Kingdom 2 employees

UK-based cybersecurity firm specializing in penetration testing services such as web application, API, internal, and cloud assessments; offers single and ongoing engagements with active exploitation to identify security vulnerabilities.

Penetration Testing (web Application
API
Internal
+3 more
Securityium

Securityium

Manual and Custom Penetration ...
London, United Kingdom 3 employees

Securityium Ltd is a UK-based cybersecurity firm specializing in penetration testing and vulnerability assessments; with 2 employees and a 57.1% YoY workforce decline, it focuses on high-security testing services for enterprise clients. Founded in 2020 and headquartered in London, it maintains a modest online presence with 2,219 monthly visits and a global rank of #6,583,875.

Penetration Testing
Vulnerability Assessment
IT Security Review And Assurance
+3 more
Pentiq

Pentiq

Web Application Pentesting
London, United Kingdom 8 employees

Cybersecurity company specializing in penetration testing and vulnerability assessments; based in London, UK, with 7 employees, founded in 2016. Offers ethical hacking, social engineering, security training, and compliance services, with active social media presence and a focus on secure testing environments.

Penetration Testing
Cyber Security Consultancy
Training
+3 more
Incursion Cyber Security

Incursion Cyber Security

Business-Focused Penetration T...
Midsomer Norton, United Kingdom 2 employees

Incursion Cyber Security is a UK-based cybersecurity consultancy specializing in penetration testing, security audits, and cyber training; founded in 2022, with 3 employees and a focus on enhancing network security for mid-market clients. They are a highly accredited, boutique firm with a strong emphasis on business-focused security services.

Penetration Testing
Cyber Essentials Certification
Continuous Testing Platform
+3 more
Dhound.io

Dhound.io

Web Application Pentesting
Leeds, United Kingdom 3 employees

Dhound.io is a UK-based cybersecurity firm specializing in manual web and mobile application penetration testing; 3 employees, founded 2015, headquartered in Leeds, with a focus on detecting suspicious activity to prevent attacks. It has a rapid growth rate (+50% monthly) and a modest web presence with 1,316 monthly visits.

Penetration Testing
Ethical Hacking
Security Consulting
+4 more
Securewinds

Securewinds

Web Application Pentesting
Other 2 employees

UK-based cybersecurity firm with 2 employees; specializes in consultancy, penetration testing, and security assessments for digital assets and infrastructure; provides web application penetration testing and cloud security services; headquartered in London, UK.

Penetration Testing For Web
Network
Cloud
+5 more
Heretek

Heretek

Comprehensive Infrastructure a...
United Kingdom 4 employees

Cybersecurity company based in the United Kingdom; specializes in penetration testing for infrastructure, web applications, and APIs, with 3 employees and 33.3% YoY growth; founded in 2023, with a focus on digital transformation, cloud engineering, and IT consultancy.

Penetration Testing
Vulnerability Assessment
Adversary Simulation
+3 more
Cyber Alchemy Ltd.

Cyber Alchemy Ltd.

Red Teaming and Strategic Pene...
sheffield, United Kingdom 5 employees

Cyber Alchemy Ltd. is a UK-based cybersecurity company founded in 2023 with 3 employees; specializes in assessment, penetration testing, red team exercises, cloud assessment, and consultancy; also provides remediation training, ethical hacking, and cyber awareness training; focuses on improving clients' security posture; web presence includes 7,108 monthly visits and a global rank of 2,136,249; core service includes penetration testing.

Penetration Testing
Resilience Assessments
AI Security Services
+3 more
Pen Test Partners

Pen Test Partners

Web Application Pentesting
Buckingham, United Kingdom 110 employees

Cybersecurity company specializing in penetration testing services across networks, applications, and cloud; 67 employees, $6.1M revenue, founded 2010, based in Buckingham, UK; recognized for expertise in red teaming, testing, and security consulting, with 28,414 monthly website visits and global rank #1,041,359.

Penetration Testing
Red Teaming
Attack Surface Assessment
+5 more
Razorthorn Security

Razorthorn Security

CREST Accredited Penetration T...
Tunbridge Wells, United Kingdom 17 employees

Cybersecurity consultancy specializing in penetration testing, compliance, and consulting; 14 employees with -10.5% YoY growth; CREST-accredited pentesting across infrastructure, wireless, web, and mobile; Recognized by Gartner; Founded 2007; Tunbridge Wells, UK.

Cybersecurity Consultancy
Penetration Testing
Continuous Threat Exposure Management
+2 more
Mobius Binary

Mobius Binary

Internal and External Penetrat...
Bath, United Kingdom 12 employees

IT services company specializing in cybersecurity penetration testing; provides internal and external penetration testing, web app testing, vulnerability assessments, and OSINT; 8 employees; Founded 2021; Bath, UK.

Penetration Testing
Vulnerability Assessment
Red Teaming
+1 more
Sencode Cyber Security

Sencode Cyber Security

Web Application Pentesting
Middlesbrough, United Kingdom 2 employees

UK-based private cybersecurity company specializing in penetration testing and security consultancy; offers web, mobile, and infrastructure pentest services, CREST-accredited, with 2 employees, founded in 2019, headquartered in Middlesbrough, UK. Provides comprehensive cybersecurity solutions with a pioneering approach to modern security and OSINT challenges.

Penetration Testing (web
Network
Mobile
+5 more
Bruce & Butler

Bruce & Butler

External and Internal Penetrat...
Sheffield, United Kingdom 15 employees

Cybersecurity company specializing in penetration testing, vulnerability assessments, and audits; 8 employees with 15.4% YoY growth; founded 2015; Sheffield, UK; provides CREST-accredited penetration testing services and data protection solutions for UK and international clients.

Data Protection
Cyber Security
Penetration Testing
+2 more
Salus Cyber

Salus Cyber

CHECK Penetration Testing
United Kingdom 35 employees

Cybersecurity company based in the United Kingdom; specializes in penetration testing, incident response, data protection, and security strategy; 25 employees with 9.4% YoY growth; founded in 2017; offers comprehensive security services including ethical penetration testing and compliance testing.

Penetration Testing
Critical Response
Data Protection
+3 more
Cybercontrols.io

Cybercontrols.io

Offensive Security
Morpeth, United Kingdom 8 employees

Cybercontrols.io is a UK-based infosec consultancy providing cybersecurity and compliance services, including penetration testing, internal audits, and endpoint security; founded in 2022, with 4 employees and +300% YoY growth, headquartered in Morpeth, UK.

Compliance Consulting
Penetration Testing
Cybersecurity Strategy
+4 more
Mollis Group

Mollis Group

Cloud and Application Penetrat...
London, United Kingdom 14 employees

UK-based IT services and consulting company founded in 2019; specializes in cloud cybersecurity, penetration testing, ethical hacking, security architecture, and digital transformation; 3 employees; headquartered in London, UK; provides professional penetration testing services as explicitly stated on their website.

Penetration Testing
Ethical Hacking
Security Consulting
+1 more
CyberCrowd

CyberCrowd

Comprehensive Penetration Test...
Newbury, United Kingdom 34 employees

CyberCrowd is a UK-based IT services and cybersecurity company founded in 2016, with 18 employees and a 30.8% YoY growth. It specializes in penetration testing, assessment services, and cyber security consulting, serving clients with comprehensive vulnerability evaluations, web and mobile app testing, and certification readiness. The firm is a market leader in cyber security assessment, with a strong web presence and active recent activity in industry news.

Penetration Testing
Cybersecurity Assessment
CISO As A Service
+4 more
C360RED

C360RED

Web Application Pentesting
United Kingdom 2 employees

IT system testing and evaluation company specializing in penetration testing; based in United Kingdom; 2 employees; founded 2025; focuses on web and network security testing, emphasizing transparency and affordability.

Penetration Testing
Vulnerability Assessments
Web Application Testing
+3 more
RM Information Security

RM Information Security

Web Application Pentesting
Manchester, United Kingdom 6 employees

RM Information Security is a UK-based private cybersecurity consultancy specializing in penetration testing and information security. Founded in 2015 and employing 6 staff, they focus on expert, communication-driven services with active penetration testing offerings, including application security and vulnerability exploitation. They are headquartered in Manchester, UK, with a modest online presence of 1,068 monthly visits and a global rank of approximately 12.7 million.

Penetration Testing (web
Infrastructure
Mobile
+4 more
th4ts3cur1ty.company

th4ts3cur1ty.company

Purple Team Penetration Testin...
Other 20 employees

Cybersecurity company specializing in penetration testing, purple team, GRC, and cyber strategy; UK-based with 10 employees, founded in 2019, offering straightforward, no-nonsense support and international services. Focuses on providing clear, technical cybersecurity solutions with a small, dedicated team.

Cyber Defence
Penetration Testing
Consultancy Services
+4 more
CYBER I UK

CYBER I UK

Network and Infrastructure Pen...
Other 11 employees

Cyber I UK is a UK-based private cybersecurity company specializing in penetration testing, assurance, and incident response; 4 employees, founded in 2000, with a UK domain and contact details, and 847 monthly website visits.

Penetration Testing
Cyber Risk Advisory
Antivirus And Total Security
+4 more
One Compliance Cyber Limited

One Compliance Cyber Limited

Enterprise Penetration Testing
United Kingdom 17 employees

Cybersecurity company based in the United Kingdom; specializes in penetration testing, red team testing, vulnerability assessments, incident response, and data privacy consulting; 15 employees with 6.3% YoY growth; founded 2018; focuses on data privacy and cyber security services for businesses.

Penetration Testing
PCI DSS Compliance
Data Protection Consultancy
+4 more
Ruptura InfoSecurity

Ruptura InfoSecurity

Comprehensive Penetration Test...
United Kingdom 14 employees

UK-based IT services and cybersecurity company specializing in CREST & CHECK Approved Penetration Testing; 8 employees, 7.7% YoY growth, founded 2020, operates in a competitive global market with a modest web presence and active social media engagement.

Penetration Testing
Red Teaming
Cyber Essentials Certification (basic And Plus)
+1 more
ThreatMatrix

ThreatMatrix

Web Application Pentesting
Manchester, United Kingdom 11 employees

ThreatMatrix is a private cybersecurity firm headquartered in Manchester, UK, with 3 employees; it offers comprehensive security services including penetration testing, web security, data security, network security, endpoint security, forensic analysis, and phishing training, emphasizing its focus on safeguarding digital assets and infrastructure.

Penetration Testing
Web Application Security
Vulnerability Management
+5 more
RandomStorm Ltd

RandomStorm Ltd

Network and Social Engineering...
United Kingdom 4 employees

UK-based network security company providing enterprise security management tools and penetration testing services; employs 4 people, founded 2007, with $2.5M annual revenue; headquartered in United Kingdom.

Penetration Testing
Vulnerability Scanning
Intrusion Detection
+2 more
Cyberis

Cyberis

Infrastructure and Application...
United Kingdom 27 employees

Cyberis is a UK-based cybersecurity consultancy headquartered in Tewkesbury, Gloucestershire; specializes in information security with a focus on penetration testing, incident response, and simulated targeted attacks. The firm is CREST-accredited, demonstrating recognized expertise and compliance in penetration testing services.

Penetration Testing
Red Teaming
Incident Response
+2 more
Cyro Cyber

Cyro Cyber

Offensive Security Testing
United Kingdom 41 employees

Cybersecurity company based in London, UK; provides penetration testing (pentest) services including PenTest-as-a-Service and offensive security testing; headquartered in London, England.

Penetration Testing
Offensive Security Testing
Governance
+3 more
Surecloud Cyber Services

Surecloud Cyber Services

Infrastructure and Cloud Secur...
United Kingdom 28 employees

Cybersecurity company based in Gloucester, UK; specializes in penetration testing, including infrastructure and cloud security testing, with active vulnerability assessment and attack simulation capabilities.

Penetration Testing
Vulnerability Management
Managed Detection And Response
+4 more
CODA Security

CODA Security

Application and Systems Pentes...
Leamington Spa, United Kingdom 8 employees

Cybersecurity consultancy specializing in computer and network security; founded 2017, 4 employees, based in Leamington Spa, UK. Offers penetration testing, risk management, vulnerability assessment, and bespoke cybersecurity services; emphasizes high-quality, client-focused solutions and invests heavily in personnel.

Penetration Testing
Vulnerability Assessment
Risk Management
R & I Consulting

R & I Consulting

Network and Application Penetr...
Other 5 employees

UK-based IT services and cybersecurity consulting firm founded in 2017; specializes in penetration testing and vulnerability assessments with 3 employees and headquartered at 5 Freeman Close, Castle Hill, Ebbsfleet Valley, DA10 1BY, UK.

Penetration Testing
Vulnerability Assessment
Threat Intelligence
+5 more
Secarma Ltd

Secarma Ltd

Web Application Pentesting
United Kingdom 23 employees

Cybersecurity company specializing in penetration testing services; based in Manchester, UK, with headquarters at 3 Archway, Birley Fields, Manchester, M15 5QJ; UK registered company number 04217114; explicitly offers penetration testing and cybersecurity assessments.

Penetration Testing
Cybersecurity Consultancy
Certification Services
+1 more
Amr Cybersecurity

Amr Cybersecurity

Human-Led Penetration Testing
United Kingdom 17 employees

UK-based cybersecurity company providing penetration testing services with CREST accreditation; employs vetted, certified security experts for tailored testing, reporting, and post-engagement support.

Penetration Testing
PCI DSS Assessment
Red Teaming
+5 more
CODA Security Limited

CODA Security Limited

Application and Systems Pentes...
United Kingdom 4 employees

UK-based cybersecurity consultancy specializing in bespoke services; offers penetration testing, vulnerability assessments, and risk management with experienced principal-led teams. Headquartered in Leamington Spa, Warwickshire.

Penetration Testing
Vulnerability Assessment
Risk Management
CSaaS

CSaaS

Infrastructure and ICS Penetra...
United Kingdom 3 employees

UK-based cybersecurity company operating from csaas.uk; specializes in penetration testing, including external/internal infrastructure assessments and attacker-modeled testing for ICS environments, with explicit service offerings listed on their website.

Penetration Testing
Cybersecurity Assessments
Compliance Programs
+5 more
CDEC Ltd

CDEC Ltd

Physical Penetration Testing
United Kingdom 8 employees

UK-based IT services and cybersecurity consultancy with 3 employees and +60% YoY growth; specializes in penetration testing, security audits, incident response, and bespoke hardware solutions; registered in England and Wales (Company No. 10292654), headquartered in London, with 2,161 monthly website visits and a global rank of #8,464,690.

Penetration Testing
Cyber Security Consulting
Technical Surveillance Countermeasures (tscm)
+1 more
Mobius Consulting

Mobius Consulting

Hands-On Penetration Testing
United Kingdom 11 employees

UK-based cybersecurity company specializing in penetration testing and security assessments; listed on UK Companies House with registration numbers 13538454 and 06958601; offers comprehensive security testing including penetration testing and vulnerability scanning.

Penetration Testing
Security Testing
Information Security
+5 more
Conseal Security Ltd

Conseal Security Ltd

Mobile and Web Application Pen...
London, United Kingdom 3 employees

Cybersecurity company specializing in penetration testing for Android, iOS, and web apps; 3 employees with 50% YoY growth; based in London, UK; offers affordable security testing, code analysis, and legacy product assessments.

Penetration Testing
Ethical Hacking
Vulnerability Identification
+4 more
Cyphere Ltd

Cyphere Ltd

Comprehensive CREST-Accredited...
United Kingdom 2 employees

UK-based cybersecurity firm specializing in penetration testing; headquartered in Greater Manchester with a registered office in Altrincham, UK; offers CREST-accredited security testing services.

Penetration Testing
Vulnerability Assessment
Red Teaming
+3 more
Cyber Defence Ltd

Cyber Defence Ltd

Goal-Driven Penetration Testin...
United Kingdom 5 employees

Cyber Defence Ltd is a UK-based cybersecurity firm specializing in modern security operations, threat intelligence, and penetration testing; offers goal-driven pentest services across diverse environments, supported by CREST accreditation, and operates primarily in the UK and Europe.

Managed SOC
Threat Intelligence
Penetration Testing
+3 more
Cloudpush

Cloudpush

Network and System Penetration...
London, United Kingdom 4 employees

IT services and consulting firm based in London, UK; specializes in cybersecurity, penetration testing, managed IT, and cloud solutions; 2 employees, founded 2020; provides comprehensive cybersecurity services including penetration testing, security awareness, and network security.

Managed IT Services
Cloud Solutions
Cybersecurity Including Penetration Testing
+5 more
IP Overwatch Ltd

IP Overwatch Ltd

Penetration Testing
United Kingdom 10 employees

Cybersecurity firm based in the UK; offers penetration testing and vulnerability assessments; utilizes advanced technology to identify vulnerabilities and mitigate cyber risks.

Penetration Testing
Vulnerability Assessments
24/7 Threat Monitoring
+3 more
Nextgen Cyber

Nextgen Cyber

Red Team Simulations
United Kingdom 10 employees

UK-based cybersecurity firm specializing in penetration testing, security assurance, red team simulations, and social engineering tests; located in Barnet, London, with UK registration at Companies House.

Penetration Testing
Security Assurance
Red Team Simulations
+5 more
Cyberlab

Cyberlab

Comprehensive Penetration Test...
United Kingdom 71 employees

CyberLab is a UK-based cybersecurity firm specializing in penetration testing services; it explicitly offers penetration testing as a core service and is headquartered at Bridgford House, Heyes Lane, Alderley Edge, SK9 7JP.

Penetration Testing
Red Teaming
Vulnerability Assessment
+4 more
Toro Solutions

Toro Solutions

Red Team Penetration Testing
Other 21 employees

UK-based security and investigations company founded in 2015, with 13 employees and a focus on cyber, physical, and personnel security. Known for creating the UK's first Red Team penetration test, it provides active penetration testing, cyber attack simulation, and security consultancy services, serving government and business clients globally.

Managed Security And Consultancy Services Including Red Team Penetration Testing
Cyber Security
Physical Security
+2 more
Hackyde Limited

Hackyde Limited

Network and Application Pentes...
United Kingdom 3 employees

UK-based cybersecurity company specializing in penetration testing; led by professionals with 23+ years of experience; holds CREST and OSCP certifications; based in Birmingham, UK.

Penetration Testing
Red Teaming
Incident Response
+5 more
Risk Crew

Risk Crew

Web Application Pentesting
United Kingdom 9 employees

UK cybersecurity firm specializing in penetration testing; CREST-accredited with comprehensive testing services including detailed reports and retesting; registered at Phoenix House, Smeaton Close, Aylesbury, Buckinghamshire, England HP19 8UW.

Penetration Testing
Security Testing
Risk Management
+4 more
3ct Security

3ct Security

Comprehensive Penetration Test...
United Kingdom 5 employees

UK-based cybersecurity firm specializing in penetration testing services; headquartered in Malvern, Worcestershire, with verified operations in the UK. Provides security assessments including vulnerability management and maturity evaluations.

Penetration Testing
Vulnerability Management
Cyber Maturity Reviews
+3 more
Equilibrium Security

Equilibrium Security

CREST-Certified Penetration Te...
United Kingdom 4 employees

UK-based private cybersecurity firm founded in 2012; specializes in penetration testing, cyber essentials, cyber awareness, and phishing simulations; 2 employees with -73.3% YoY growth; 3,019 monthly visits; competes with Marco Technologies, Convergence Networks, and Trustwave.

Penetration Testing
Cyber Essentials Certification
Cyber Awareness Training
+4 more
Red Team Partners

Red Team Partners

Infrastructure Penetration Tes...
Other 35 employees

UK-based private cybersecurity company founded in 2015; 23 employees with 20.7% YoY growth; specializes in penetration testing, cloud security, and cybersecurity consulting; headquartered in London, England.

Penetration Testing
Red Team Services
Vulnerability Assessment
+2 more
NormCyber

NormCyber

CREST-Certified Penetration Te...
United Kingdom 72 employees

UK-based cybersecurity firm specializing in CREST-certified penetration testing services; offers active vulnerability identification and remediation through authorized cyber-attack simulations; headquartered in Fareham, England, with a registered office at 8 Barnes Wallis Road.

Penetration Testing
Managed Detection And Response
Incident Response
+5 more
Azacus.io

Azacus.io

Network and Web Application Pe...
United Kingdom 2 employees

Cybersecurity company specializing in penetration testing, vulnerability assessments, and offensive security services; based in the United Kingdom with 2 employees, founded in 2018. Provides web application testing, infrastructure testing, and pentesting program management to assess and improve security posture.

Penetration Testing
Vulnerability Assessment
Security Consulting
+1 more
Clear Cut Cyber Ltd

Clear Cut Cyber Ltd

Comprehensive Penetration Test...
United Kingdom 3 employees

UK-based cybersecurity firm with headquarters in London; provides penetration testing services confirmed by website content and third-party documentation; active in offensive security testing.

Penetration Testing
Threat Modelling
Risk Management
+4 more
Genius Security

Genius Security

Web Application Pentesting
Beaconsfield, United Kingdom 2 employees

UK-based IT services and cybersecurity consulting firm specializing in penetration testing (Black/White Box), web application testing, network vulnerability assessments, and cyber forensics; founded in 2018 with 2 employees, headquartered in Beaconsfield, Buckinghamshire.

Penetration Testing
Web Application Testing
Network Vulnerability Assessments
+4 more
Secure Impact Ltd

Secure Impact Ltd

Bespoke Penetration Testing fo...
United Kingdom 6 employees

UK-based cybersecurity consultancy; offers penetration testing, incident response tabletop exercises, and offensive security services; specializes in bespoke, interactive assessments for global SaaS providers and enterprises.

Penetration Testing
Incident Response Tabletop Exercises
Offensive Security Services
+2 more
InfoSec Governance

InfoSec Governance

Web Application Pentesting
United Kingdom 2 employees

UK-based cybersecurity firm specializing in cybersecurity education, protection, and penetration testing; offers web application pentests and security consulting; registered in England and Wales (Company No. 12289766); headquartered in Darlington, UK.

Cyber Essentials And IASME Cyber Assurance Certifications
Penetration Testing
Virtual CISO
+3 more
Moore Clearcomm

Moore Clearcomm

Cybersecurity Penetration Test...
United Kingdom 501 employees

Cybersecurity firm based in London, UK, providing penetration testing and cyber resilience services; explicitly lists penetration testing as a core offering, emphasizing security testing and vulnerability assessment capabilities.

Penetration Testing
Cyber Resilience
Threat Assessments
+5 more
Agile Security

Agile Security

Web and Infrastructure Pentest...
United Kingdom 3 employees

Cybersecurity company providing end-to-end security solutions with expertise in penetration testing for web and infrastructure; based in London, UK, with presence in India, US, and Australia; founded 2015; 3 employees (+12.5% YoY).

Penetration Testing
Security Solution Development And Design
Hands-on Technical Training
+4 more
Bulletproof (Cyber Security)

Bulletproof (Cyber Security)

CREST & OSCP Penetration Testi...
Other 121 employees

UK-based private cybersecurity firm with 96 employees (+0.8% YoY growth), $3.0M annual revenue; specializes in penetration testing, data protection, and compliance services; registered at 20 Grosvenor Place, London, and based in Stevenage, Hertfordshire; ranks #1,574,985 globally and #154,108 in the UK; active in cybersecurity & compliance categories including ISO 27001, SOC 2, GDPR, and red team assessments.

Penetration Testing
Cyber Security Training
Compliance Consultancy
+4 more
JASPER ENTERPRISES LIMITED

JASPER ENTERPRISES LIMITED

Cybersecurity Penetration Test...
United Kingdom 7 employees

JASPER ENTERPRISES LIMITED is a UK-based private financial services firm with 7 employees and +40% YoY growth; they specialize in cybersecurity, including penetration testing, incident response, dark web monitoring, and cyberrange security, with over 10 years of expertise in safeguarding medium-sized and international companies.

Penetration Testing And Incident Response
Wolf Network Security Ltd

Wolf Network Security Ltd

Web Application and Infrastruc...
United Kingdom 2 employees

UK-based cybersecurity company specializing in penetration testing; offers testing of web applications and infrastructure using automated and manual exploitation tools; registered in England and Wales with company number 10635866, located at 47 Lloyd Street, Manchester.

Penetration Testing
Cloud Security Reviews
Network Installations
+3 more
Orpheus Cyber

Orpheus Cyber

Simulated Targeted Attack and ...
Other 27 employees

UK-based cybersecurity company specializing in threat intelligence, risk management, and penetration testing; CREST-accredited for simulated targeted attack and response services; 18 employees, $8M annual revenue, founded in the UK, with a focus on cybersecurity consulting and threat mitigation.

Penetration Testing
Threat Intelligence
External Attack Surface Management
+4 more
Cybx Ltd

Cybx Ltd

Comprehensive Infrastructure a...
United Kingdom 2 employees

UK-based cybersecurity company specializing in digital resilience and penetration testing; offers ethical hacking and security assessment services; headquartered in Worcester, England.

Penetration Testing
Vulnerability Assessments
Phishing Campaigns
+3 more
Secure360.io

Secure360.io

Proactive Penetration Testing
United Kingdom 3 employees

UK-based cybersecurity provider in Inverurie, Scotland; offers enterprise-grade managed security services for SMBs with 24/7 protection and monthly penetration testing, emphasizing proactive threat mitigation.

Managed Cyber Security Services
Penetration Testing
Cyber Essentials Certification
+4 more
Hydras

Hydras

Web Application Pentesting
United Kingdom 7 employees

UK-based cybersecurity firm Hydras IT Limited specializes in penetration testing and cloud security services; offers AWS web application penetration tests with simulated cyberattacks, active testing, and detailed reporting. Operates from London and Burgess Hill, serving clients with security engineering expertise.

Cloud Consulting
Security Consulting
Devops Automation
+2 more
Amberwolf

Amberwolf

Threat Intelligence Led Penetr...
United Kingdom 12 employees

UK-based cybersecurity company specializing in penetration testing, attack simulation, and red teaming; CREST-accredited for Threat Intelligence Led Penetration Testing STAR-FS assessments; trusted by governments and security leaders globally; founded in London, UK.

Penetration Testing
Attack Simulation
Red Teaming
+1 more
𝐍𝐞𝐭𝐟𝐨𝐫𝐭𝐞 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐢𝐧𝐠 𝐋𝐭𝐝

𝐍𝐞𝐭𝐟𝐨𝐫𝐭𝐞 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐢𝐧𝐠 𝐋𝐭𝐝

Advanced Penetration Testing
London, United Kingdom 2 employees

Cybersecurity solutions company specializing in advanced penetration testing services; based in London, UK, founded in 2023, with 2 employees and 100% YoY growth. Focuses on safeguarding digital assets and fortifying defenses against cyber threats.

Penetration Testing
Cybersecurity Audits
ISO 9001/27001/42001 Implementation
+3 more
Talion Cyber Security

Talion Cyber Security

Consultant-Led Penetration Tes...
camberley, United Kingdom 94 employees

Cybersecurity company specializing in hybrid cybersecurity services and penetration testing; 94 employees with 3.3% YoY growth; founded in 2020; based in Camberley, UK. Known for providing defense-grade cybersecurity solutions and explicit penetration testing services, with a focus on identifying vulnerabilities through simulated attacks.

Managed Detection & Response (mdr)
Soc-as-a-service
SIEM Optimization & XDR Alignment
+5 more
HexaTrace

HexaTrace

Web & Mobile Application Pente...
Derby, United Kingdom 2 employees

Cybersecurity company based in Derby, UK, founded in 2024 with 2 employees; specializes in security frameworks, threat detection, incident response, and ethical hacking services including penetration testing, web/mobile/app/network/cloud security audits, and social engineering; offers active exploitation and simulated real-world attack testing.

Penetration Testing
Incident Response
Threat Intelligence
+3 more
Pragma

Pragma

Website Security Penetration T...
United Kingdom 11 employees

Cybersecurity company specializing in penetration testing, security testing, and digital forensics; CREST approved provider with $1.5M annual revenue and 2 employees based in the UK, serving high-profile clients with a pragmatic approach to cyber resilience.

Penetration Testing
Cybersecurity Consulting
Regulatory Compliance
+4 more
Cynance

Cynance

Application Security Pentestin...
London, United Kingdom 11 employees

Cybersecurity and network security consulting firm based in London, UK; 7 employees with 50% YoY workforce decline; specializes in penetration testing, ethical hacking, and application security testing to identify vulnerabilities and enhance defenses; trusted by organizations across UK, EU, and worldwide.

Penetration Testing
Application Security
Infrastructure Security
+3 more
EBC Group

EBC Group

CREST-Approved Penetration Tes...
United Kingdom 119 employees

UK-based private IT services and consulting firm founded in 1989; 52 employees, $10M revenue; specializes in managed IT, cloud, cybersecurity, and connectivity solutions; partners with UK businesses to enhance security and operational efficiency; offers CREST-approved penetration testing services in collaboration with Assure Technical.

Managed IT Services
Cloud Solutions
Cybersecurity (including Crest-approved Penetration Testing)
+3 more
AnchorSec

AnchorSec

Infrastructure Penetration Tes...
United Kingdom 2 employees

UK-based cybersecurity research and consulting firm specializing in penetration testing; offers infrastructure, web, mobile, and cloud security assessments with a focus on offensive security techniques; registered in Manchester, UK.

Penetration Testing
Infrastructure Security Assessments
Web And Mobile Application Security
+3 more
PrimoConnect: Compliance Support - Cyber Security - Pen Testing - Cloud - Networks

PrimoConnect: Compliance Support - Cyber Security - Pen Testing - Cloud - Networks

Web Application Pentesting
Other 2 employees

UK-based private IT security company founded in 2017 with 2 employees; specializes in penetration testing, cloud infrastructure, and compliance support. Offers offensive security testing, cyber awareness training, and secure cloud/network design, with explicit focus on penetration testing services and cyber security consultancy.

Penetration Testing
Cyber Security Consulting
Compliance Support
+1 more
Mandalorian

Mandalorian

Tailored Enterprise Penetratio...
United Kingdom 2 employees

Cybersecurity company based in Caterham, Surrey, United Kingdom; specializes in enterprise information security consultancy, including penetration testing and incident response; employs 2 people, founded 2005; serves public and private sectors across EMEA and Asia-Pacific.

Enterprise Information Security Consultancy
Penetration Testing
Incident Response
+1 more
CovertSwarm

CovertSwarm

Adversary-Led Red Team Penetra...
London, United Kingdom 63 employees

Cybersecurity company specializing in penetration testing, ethical hacking, and red teaming; 44 employees with 10.5% YoY growth; launched a free Offensive Operations Center for the energy sector in 2023 • 2020-founded; London, UK; Private company.

Offensive Cybersecurity Services Including Constant Cyber Attack Subscription
Penetration Testing
Ethical Hacking
+3 more
GoAllSecure

GoAllSecure

Network Penetration Testing
London, United Kingdom 12 employees

GoAllSecure is a UK-based private cybersecurity services provider specializing in penetration testing, red team exercises, and comprehensive security solutions. Founded in 2021, it has 9 employees with 50% YoY growth, offering services across website, API, cloud, server, and mobile security to global clients. The company emphasizes offensive security with active penetration testing and assurance offerings, serving both government and private sectors worldwide.

Penetration Testing
Red Team Exercises
Vulnerability Assessment
+4 more
Node4

Node4

Web Application Penetration Te...
Derby, United Kingdom 753 employees

UK-based IT services and consulting company with 529 employees, $86.8M revenue, specializing in infrastructure, cloud, colocation, and cybersecurity; offers CREST-certified penetration testing and maintains strong vendor relationships, with 23,324 monthly web visits and a global rank of #1,197,953.

Cloud Managed Services
Business Applications
Consulting
+5 more
ThreatSpike

ThreatSpike

Unlimited Penetration Testing ...
United Kingdom 68 employees

Cybersecurity company specializing in managed security services and penetration testing; offers unlimited penetration testing and system-specific assessments, with 47 employees, $10M revenue, founded in 2011, based in the UK, with $26.3M in funding.

Unlimited Penetration Testing
Fully Managed IT Services
Incident Detection And Response
+5 more
UK Cyber Security Group Ltd

UK Cyber Security Group Ltd

Network and Web Application Pe...
Swadlincote, United Kingdom 2 employees

UK Cyber Security Group Ltd is a UK-based private cybersecurity firm specializing in IT network security and penetration testing services; founded in 2019, with 1 employee, it emphasizes data protection, security awareness, and compliance, serving clients across the UK.

Cyber Essentials And IASME Cyber Assurance Certification
Penetration Testing
Network Scanning And Testing
+3 more
iSTORM®  Privacy - Security - Pentesting Consultancy

iSTORM® Privacy - Security - Pentesting Consultancy

Network and Application Pentes...
Stratford-upon-Avon, United Kingdom 19 employees

UK-based IT services and consulting firm specializing in privacy, security, and penetration testing; CREST-approved provider with 6 employees, founded in 2018, focusing on simplifying standards compliance and offering real-world security solutions. Maintains 1,806 monthly web visits and ranked #8,654,171 globally.

Privacy Consulting
Security Consulting
Penetration Testing
+1 more
FoxTech Cyber

FoxTech Cyber

Network Penetration Testing
United Kingdom 14 employees

Cybersecurity company based in the United Kingdom; specializes in managed cybersecurity services including vulnerability management, security monitoring, and penetration testing for SMEs. Offers a Managed SOC platform with integrated vulnerability management, security monitoring, and pen-testing; 8 employees, founded 2020, +16.7% YoY growth.

Penetration Testing
Vulnerability Management
Security Monitoring
+3 more