NGS | Next Generation Security
UK-based cybersecurity company specializing in penetration testing; offers manual and automated pentest services, including CREST-certified testing; registered in England and Wales with Company Number 11204446, headquartered in the United Kingdom.
Cyber Analytica
Cyber Analytica is a UK-based cybersecurity firm specializing in IT managed services and penetration testing; headquartered in London, UK, with explicit mention of pentest services on its homepage and comprehensive endpoint protection offerings.
Laburity
Cybersecurity services provider based in the United Kingdom; specializes in vulnerability assessments, penetration testing, compliance, and code analysis; 9 employees; Founded 2022; Offers active penetration testing services and holistic cybersecurity solutions.
SRM - Security Risk Management Ltd
UK-based private information services company founded in 2002; specializes in cybersecurity with explicit penetration testing services to identify vulnerabilities; 4 employees, $6.5M revenue, $16.7K seed funding, part of Arcanum Group, with recent activity in security collaborations and innovations.
CyberWhite Ltd
CyberWhite Ltd is a UK-based cybersecurity consultancy specializing in penetration testing, risk mitigation, and security assurance; with 8 employees, founded in 2018, and a client-focused approach that emphasizes tailored security solutions, training, and compliance in cybersecurity standards.
The Times
The Times is a private newspaper publishing company based in London, UK, with 703 employees (+18.1% YoY growth), $40M annual revenue, founded in 1785. It attracts ~25M monthly website visits and ranks #2,383 globally. The company provides UK, US, and world news, analysis, and headlines, with active penetration testing services as evidenced by multiple cybersecurity roles.
Barefoot Cyber
Cybersecurity company headquartered in the United Kingdom; specializes in penetration testing services with proven ability to scope, review, and execute pentest engagements.
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RightCue
Cybersecurity consulting firm specializing in compliance and penetration testing; 14 employees (+26.7% YoY growth); CREST-certified pentest services; Founded 2009; Basingstoke, UK.
Cybarik
Cybersecurity consulting firm based in the UK; provides penetration testing, vulnerability assessment, and tailored cybersecurity training for individuals and organizations. Located in Harlow, Essex, with a focus on improving clients' cybersecurity skills and knowledge.
Zoonou
UK-based IT services and consulting firm specializing in software testing and QA; offers comprehensive testing including penetration testing validated by CREST and UK Digital Marketplace; 34 employees, $4.1M revenue, founded 2007, headquartered in Eastbourne, East Sussex.
Digital Pathways Ltd
UK-based private IT security firm founded in 1996; specializes in penetration testing, ethical hacking, data encryption, and compliance; 2 employees, over 20 years of experience in cyber security; offers managed security services, data leakage detection, and GDPR consultancy.
Hacker Academy
Cybersecurity training and consultancy provider with a focus on penetration testing and attack simulations; 5 employees, +25% YoY growth, founded 2017, based in United Kingdom. Operates CyberLabs for real-life cyber-attack simulations, helping organizations improve cybersecurity posture.
Nellcote Ltd
UK-based private cybersecurity firm specializing in penetration testing and security consultancy; 5 employees with 33.3% YoY growth, founded in 2017, CREST accredited with expertise in active attack simulations across multiple environments, emphasizing personalized IT and cybersecurity services.
IT Valley London Ltd
IT Valley London Ltd is a UK-based IT services and cybersecurity company specializing in penetration testing, application security testing, ransomware, and cloud penetration testing; with 2 employees and 50% YoY growth, they focus on delivering high-quality security solutions for businesses.
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Forensic Control
Cybersecurity consultancy based in London, UK; specializes in penetration testing, security assessments, and vulnerability scans; headquartered at 15 Belgrave Square, London, SW1X 8PS; offers tailored cybersecurity solutions to assess, prevent, and respond to cyber threats.
IOActive, Inc.
IOActive, Inc. is a private computer and network security firm founded in 1998, with 83 employees and $25M annual revenue; they have a UK-registered branch, IOACTIVE EUROPE LIMITED, based in London. The company offers full-stack security assessments, secure development lifecycle, advisory, and training services, serving industries such as critical infrastructure, healthcare, and finance. They explicitly market penetration testing and red team services, and have been recognized with cybersecurity awards; recent activities include security research and vulnerability disclosures.
Omerta
Omerta is a UK-based private IT services and cybersecurity consulting firm specializing in security consultancy, penetration testing, and cyber defense solutions; with 24 employees, $10M annual revenue, founded in 2009, and operating globally. The company explicitly offers penetration testing services, including remote and physical testing, and is positioned within the security and cyber security market with notable competitors like Promon, Lookout, and Asavie.
iSoft
UK-based cybersecurity firm specializing in penetration testing and ethical hacking; headquartered in Stockport, Cheshire, UK, with a presence in Manchester. Focuses on identifying vulnerabilities and safeguarding data against advanced cyber threats.
VaultStrike
VaultStrike is a UK-based private cybersecurity firm specializing in real-time website protection, vulnerability assessment, penetration testing, and security monitoring. Founded in 2020 and experiencing 150% YoY growth with 4 employees, it offers advanced security products, training, and courses in web design, graphic design, video editing, and active directory security, positioning itself as a cybersecurity automation partner.
Cyber Security Partners
UK-based cybersecurity consultancy founded in 2016; headquartered in Leeds, England. Provides penetration testing services, including internal and external pentests, to help organizations mitigate cyber risks.
Mobility Cyber Labs
Private automotive cybersecurity consulting firm based in the United Kingdom; specializes in design, testing, and benchmarking for secure mobility, including penetration testing, vulnerability assessments, and validation services; founded 2024, 4 employees, categories include automotive cybersecurity, secure mobility, ISO 21434, UNECE R155.
A&o It Group
Cybersecurity firm specializing in penetration testing; offers CREST-accredited pentest services across web, mobile, API, network, and physical security; UK-based with headquarters in Bracknell, Berkshire, serving clients worldwide.
Cybergen Security
UK-based cybersecurity company specializing in CREST-accredited penetration testing services; headquartered in Witney, Oxfordshire, with a focus on security testing and incident response.
cydentity.co.uk
UK-based cybersecurity firm specializing in proactive, business-driven protection; offers penetration testing and attack simulation services, including ransomware attack simulations; 2 employees; Founded 2025; Wales, UK.
Samurai Digital Security Limited
Cybersecurity provider specializing in penetration testing, network intrusion, incident response, and information governance; UK-based with 4 employees, $1M-$5M revenue, founded 2016; NCSC certified, serving government and institutions, with CREST accreditation for penetration testing services.
Koris365
UK-based IT and security managed service provider; offers penetration testing with customized automated and manual assessments, and cyber security evaluations; registered in England (Company No. 07709017), headquartered in Hemel Hempstead.
DefensityOne
DefensityOne is a cybersecurity solutions provider based in Milton Keynes, UK, specializing in proactive threat detection, risk management, and digital defense services. The company has 7 employees, was founded in 2015, and focuses on penetration testing, data security, and managed services, with an 18.8% YoY employee decline.
Digital Insights Consultancy
Cybersecurity company based in Milton Keynes, UK; specializes in penetration testing, incident response, digital forensics, and SOC services; 3 employees with -44.4% YoY growth; founded 2019; offers tailored cybersecurity solutions including infrastructure and cloud pentest services.
Acumen Cyber
Acumen Cyber is a UK-based private cybersecurity firm with 23 employees and +40.9% YoY growth, providing 24/7 security services including MXDR, SaaS, cloud, email, web, DNS security, vCISO, and penetration testing; recognized for security testing capabilities and CREST accreditation.
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Omnicyber Security
Cybersecurity firm based in the UK and Canada; specializes in penetration testing, managed security, and compliance services; explicitly states penetration testing as a core service and UK presence.
GRC International Group
Cybersecurity company specializing in computer and network security; provides penetration testing services as part of its cyber-defense solutions; 25 employees; GBP 14.7M annual revenue; GBP 8.4M market cap; based in Ely, UK; operates in cybersecurity, IT services, consulting; global rank #8,652,681; 1,467 monthly website visits.
Vorago Security
UK-based cybersecurity company specializing in penetration testing; headquartered in Doncaster, England, with a registered office at 1 Water Vole Way, DN4 5JP; active provider of security testing services, including penetration testing, as detailed on their website.
Cybercy Group
Cybercy Group is a UK-based cybersecurity firm headquartered in Solihull, specializing in AI-enhanced security and data protection solutions; it explicitly offers penetration testing services, including CREST-certified pentest capabilities, serving public and private sector organizations.
Purecyber Limited
UK cybersecurity firm based in Cardiff; provides penetration testing, red teaming, and threat detection services; CREST-certified penetration testing capability; trusted by organizations worldwide.
Interfuture Security Ltd
UK-based cybersecurity firm providing digital security services including penetration testing, managed SOC, incident response, and security assessments; registered at Unit C Kemps Farm Business Park, Balcombe, West Sussex, UK; offers explicit pentest services as indicated on their homepage.
Akita
UK-based IT company specializing in managed IT services and cybersecurity; offers CREST-accredited penetration testing services with headquarters in Sevenoaks, Kent, and Wrotham, Kent.
EmergeCyber
UK-based cybersecurity firm providing automated cyber risk management and penetration testing services; offers continuous network and web app/API pen testing to identify exploitable vulnerabilities, supporting organizations in strengthening security posture.
Secure Purple
UK-based cybersecurity and IT consulting company founded in 2020; 9 employees with -26.1% YoY growth; specializes in penetration testing, vulnerability assessments, security audits, incident response, threat hunting, and digital safety training; headquartered in London, UK, with a focus on comprehensive cybersecurity solutions for businesses and startups.
Data Connect Group
UK-based cybersecurity firm specializing in penetration testing; offers CREST-accredited services with a dedicated testing page and detailed FAQs; headquartered in Harrogate, West Yorkshire, with registered office in West Yorkshire.
EY
Global professional services firm based in London, UK, with 279,628 employees and $51.2B revenue; offers advisory, assurance, tax, financial, and cybersecurity services including penetration testing and red teaming; competes with Deloitte and Accenture; active in public sector initiatives and social media.
Rmg Cyber
Cybersecurity firm based in Lincolnshire, UK; offers penetration testing, auditing, cybersecurity training, risk management, cloud security, and software development services; specializes in web application pentesting with a focus on identifying vulnerabilities and providing remediation.
Cyber Security Specialists
Cyber Security Specialists is a UK-based private cybersecurity consultancy specializing in security consultancy, managed security services, and CREST-accredited penetration testing; 15 employees with 29.6% YoY growth; offers enterprise security architecture, information security, cloud security, security testing, and third-party assurance services.
SSL247 (A Sectigo Company)
UK-based private IT security firm founded in 2003; provides web security, SSL, PKI, and penetration testing services; 19 employees, $5M revenue; operates in 18 markets globally; offers certified pentest services, security audits, incident response, and digital identity solutions; ranked #2,692,341 globally and #271,928 in the UK.
Trustco Plc
UK-based technology company specializing in hybrid cloud, data centre consolidation, and cybersecurity services including penetration testing; registered in Hailsham, England, with explicit mention of conducting penetration testing and vulnerability assessments in their cybersecurity content.
Goaco
UK-based cybersecurity consultancy specializing in penetration testing; offers internal/external pentest services and delivers secure, innovative cybersecurity solutions. Registered in the UK with offices in Ebbsfleet/Northfleet and Scotland; recognized for its trusted expertise in cyber security testing.
Kumoco
UK-based consulting firm specializing in telco digital transformation; offers cybersecurity services including vulnerability assessments and penetration testing with at least annual pentest activity; headquartered in London, UK.
Sytec
UK-based cybersecurity and IT support provider; offers penetration testing, vulnerability scans, and cybersecurity assessments; operates from Salisbury, England; domain is .co.uk, confirming UK registration.
Sytech
UK cybersecurity consulting firm specializing in penetration testing; provides controlled, accredited cyber attack simulations for public and private sector clients across the UK, including police forces and government agencies.
Fortis DPC Limited
UK-based cybersecurity consultancy specializing in GDPR, ISO, PCI DSS compliance, and penetration testing; headquartered in Surrey with verified addresses in Guildford and Downside; offers online penetration testing services conducted by expert teams.
KPMG
Global professional services firm specializing in accounting, advisory, and consulting; 47,522 employees, $36B revenue, headquartered in London, UK; offers penetration testing services with CREST accreditation, serving multiple industries and markets.
Css Assure
UK-based cybersecurity firm specializing in security & compliance, including penetration testing, data protection, and certification programs; registered at No.1 Colmore Square, Birmingham, UK, as Cyber Security Strategies Ltd (Company No. 11070817). Offers technical services such as vulnerability scanning and penetration testing, with dedicated pages and blog content highlighting their expertise.
CybaVerse
Cybersecurity consultancy specializing in penetration testing, compliance, and training; 34 employees with 41.4% YoY growth; based in Portsmouth, UK; founded 2018; secured $3.3M in funding; CREST-accredited for pentest services; offers 24/7 coverage and an all-in-one cybersecurity platform.
Cyber Fortify
UK-based cybersecurity firm providing penetration testing services; offers web, API, mobile, and network pentests with a focus on real-world vulnerabilities; registered at 24 Mill Holme Drive, Brotton, England, TS12 2UR; active company supporting ongoing UK registration.
Cyber Tzar
Cyber Tzar Limited is a UK-based cybersecurity firm specializing in enterprise supply chain risk management; offers penetration testing services including Pen Test as a Service and Automated Penetration Testing, with headquarters in London, UK.
CCS IT Solutions
UK-based IT services and consulting company founded in 2004; provides IT support, cybersecurity, penetration testing, vulnerability scanning, and disaster recovery services; 4 employees; focuses on improving operational maturity and security for UK businesses.
Spritzmonkey
Cybersecurity consultancy based in the United Kingdom; specializes in CREST-certified penetration testing and vulnerability scanning services, actively marketing these capabilities and participating in industry events as a recognized provider.
INTEX IT
IT services and consulting company specializing in information security; provides penetration testing, security audits, data protection, PCI compliance, and security awareness training; based in Chatham, UK, founded 2002, with 2 employees; focuses on security consultancy and compliance services.
The SecOps Group (Creators of PentestingExams.com)
UK-based private cybersecurity firm specializing in penetration testing and security assessment; 30 employees with 17.6% YoY growth; offers external/internal network, mobile app, and web application pentests; recognized for cybersecurity consultancy and education services; active in industry events and social media.
Content+Cloud
IT services and consulting company based in London, UK, with 72 employees and $110M revenue; specializes in Microsoft 365, Azure, Dynamics 365, and cloud infrastructure; rebranded as Advania UK; provides penetration testing services as a CHECK-certified provider.
Cybernitics
Cybernitics is a UK-based cybersecurity firm specializing in offensive security, including red teaming and penetration testing; it offers attack simulations and threat emulation services to help organizations identify vulnerabilities.
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SnowCap Cyber
UK-based ethical cybersecurity consultancy specializing in offensive security, penetration testing, and red teaming; provides advanced threat emulation, vulnerability research, and cyber attack simulation with a focus on identifying security vulnerabilities.
Barrier Point Communications
IT services and consulting company based in London, UK, founded in 2011 with 3 employees; specializes in infrastructure, procurement, and cybersecurity including security and ethical hacking services (penetration testing); focuses on small and mid-sized clients with tailored, client-first solutions; staff have over 15 years of experience.
AnchorSec
Cybersecurity company specializing in offensive cyber security and penetration testing; $21.4M annual revenue with +200% YoY growth, 2 employees; founded 2022; Manchester, UK; offers infrastructure penetration testing and vulnerability research to identify and address security vulnerabilities proactively.
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Intersect
Cybersecurity company headquartered in Manchester, UK; specializes in penetration testing and security assessments, offering simulated real-world attack services to identify vulnerabilities.
DCR Partners | Digital | Change | Risk
UK-based business consulting firm specializing in digital transformation, change management, and cyber risk; offers CREST-accredited penetration testing services across network, web, mobile, wireless, and social engineering domains; 11 employees with 27.3% YoY growth, founded in 2014, headquartered in Leeds, UK.
D2NA
IT services and consulting firm specializing in cybersecurity; offers penetration testing, cyber security solutions, and expert advice; based in Stoke-on-Trent, UK, with 24 employees and over 20 years of experience.
Siber Ninja
Cybersecurity company specializing in offensive security and penetration testing; 4 employees with 25% YoY growth; founded 2015; headquartered in London, UK.
River Oakfield
Cybersecurity and investigations company specializing in penetration testing, red teaming, and adversarial simulation; based in London, UK, founded in 2017, with 4 employees and a 28.6% YoY decline in growth.
Arculus Cyber Security
Cybersecurity and compliance firm based in London, UK; provides penetration testing, security architecture, compliance, and risk management services; 6 employees with 52.9% YoY decline; specializes in cyber essentials, SOC 2, and cyber readiness assessments; Bridewell company.
Secure Debug
Cybersecurity company specializing in penetration testing and security solutions; 4 employees with -22.2% YoY growth; founded 2019; Cranfield, UK; provides expert cybersecurity services including penetration testing, cyber security solutions, and comprehensive security to protect businesses from cyber threats.
Intrinsic Security
Cybersecurity company specializing in penetration testing, threat detection, and incident response; 19 employees with 71.4% YoY growth; founded 2023; based in Peterborough, UK; offers vulnerability management, cyber threat intelligence, and attack surface management.
Xalient
IT services and consulting company specializing in modern networking, security, and communications; 205 employees (+22.8% YoY growth), $45.3M revenue; offers penetration testing services; founded 2015; headquartered in Leeds, UK.
Sovereign Secure Ltd
UK-based IT services and consulting company specializing in PCI DSS compliance, security assessments, and penetration testing; 10 employees with 25% YoY growth, founded in 2012, with global offices in the UK, US, Singapore, and Middle East; provides API, web, network, cloud, and cybersecurity testing services.
TestDel
IT Services and IT Consulting company specializing in software testing, including penetration testing and website testing services; 8 employees with 55.6% YoY growth, founded in 2005, headquartered in Harrow, UK. Focuses on outsourcing quality assurance to enhance testing efficiency and ensure issue-free applications.
Sentry
Boutique offensive security firm providing managed security services, penetration testing, and continuous defense for organizations that cannot afford uncertainty. Active CVE contributor with disclosed vulnerabilities in Apple iOS and other platforms.
Infoprotect
Infoprotect is a Brazil-based cybersecurity firm specializing in penetration testing, MSS, SOC, EDR, MDR, SIEM, and firewall solutions; with 15 employees, founded in 2007, and experiencing 15.8% annual growth. It focuses on integration, intelligence, and rapid support for diverse business needs, serving clients across various sectors.
Desec Security
Desec Security is a Brazil-based private cybersecurity firm specializing in offensive security, including penetration testing, consulting, and training. Founded in 2015 and employing 23 staff, it offers comprehensive security solutions with a focus on identifying vulnerabilities and educating professionals. The company maintains a web presence with 35,904 monthly visits and a global rank of #732,756.
HackerSec
HackerSec is a Brazilian cybersecurity company specializing in penetration testing and offensive cybersecurity; with 21 employees (+1.5% YoY growth), founded in 2011, headquartered in Barueri, São Paulo, Brazil. The company is a national reference in cybersecurity, providing top-tier services globally, with a focus on pentest services as detailed on their website and blog.
VSec
Cybersecurity company specializing in penetration testing, offensive security, and red team operations; founded in 2020 in Brazil with 4 employees and +66.7% YoY growth; provides services such as vulnerability assessments, security audits, and threat intelligence.
Hakai Security
Hakai Security is a Brazil-based cybersecurity company specializing in penetration testing, threat detection, and security development; 40 employees with 45.7% YoY growth, headquartered in São Paulo, Brazil, offering services including pentest, red team, and DevSecOps, with a focus on technical excellence and personalized security solutions.
SPQR - Information Technology Security Specialist
IT services and consulting company specializing in cybersecurity; provides penetration testing, security gap analysis, and management of security infrastructure; $26.2M annual revenue, founded 2008, based in Rio Claro, Brazil, with 2 employees.
Canny Security
IT services and consulting company specializing in information security and penetration testing; founded in 2022, with 2 employees and +100% YoY growth; headquartered in Santo André, Brazil; offers tailored security solutions and offensive security services including Red Team and application security.
Vantico
Cybersecurity firm specializing in penetration testing; offers a Penetration‑testing as a Service (PtaaS) platform that modernizes traditional pentest methods; based in São Paulo, Brazil, with a focus on manual and advanced intrusion testing for organizations.
Resh
IT services and cybersecurity firm specializing in penetration testing, vulnerability monitoring, and red team operations; 9 employees, founded 2017, headquartered in São Paulo, Brazil; offers real-time reports, personalized documentation, and Portuguese-language audit reports.
Access Security
IT Services and IT Consulting company specializing in cybersecurity; 13 employees with 33.3% YoY growth, founded in 2018 in Barueri, Brazil. Provides penetration testing, vulnerability management, and security consulting services, with active content on pentesting and compliance.
Secure Tecnologia
IT services and cybersecurity consulting company based in São Paulo, Brazil; 8 employees with 9.1% monthly growth; founded in 2016; offers penetration testing, incident response, cloud security, and managed security services.
OP Security
IT services and cybersecurity company providing penetration testing and red team services; founded in 2021, employs 2 staff (+50% YoY), headquartered in São Paulo, Brazil.
Site Blindado S.A. (uma empresa Conviso)
Cybersecurity firm specializing in penetration testing and website protection; 8 employees; $1M-$5M revenue; founded 2005 in São Paulo, Brazil; offers pentest, SSL, and cybersecurity services; protected over 5,000 sites including major Brazilian companies.
Ponto de Equilíbrio
Cybersecurity company specializing in penetration testing and blockchain security; 4 employees with 33.3% YoY growth; based in Brazil with a .br domain and 963 monthly visits; focuses on secure systems, cloud security, and cybersecurity trends.
eSecurity - Cyber Security
Cybersecurity company specializing in penetration testing, vulnerability analysis, and cybersecurity consulting; 10 employees, founded 2012, headquartered in São Paulo, Brazil; focuses on offensive security, intrusion testing, and risk management.
AVUL
Cybersecurity company specializing in penetration testing, risk assessment, and consulting; based in São Paulo, Brazil, with 2 employees since 2019, focusing on digital resilience and cybersecurity services aligned with NIST standards.
Unxpose
Cybersecurity company specializing in attack surface monitoring, vulnerability detection, and cloud security; 6 employees, founded 2020, São Paulo, Brazil; offers automated asset discovery and continuous security monitoring, with a focus on vulnerabilities across cloud and SaaS environments.
VirtuaWorks | Cibersegurança
Cybersecurity company specializing in penetration testing of web and mobile applications; 5 employees with +100% YoY growth; based in São Paulo, Brazil; offers tailored security assessments, red team, bug bounty, and OSINT services to safeguard client systems and reputation.
p1 Infosec
Cybersecurity company specializing in penetration testing services; based in Londrina, Paraná, Brazil; focuses on identifying vulnerabilities in technology environments.
IntruderLabs
Security and investigations company specializing in offensive security and penetration testing; 2 employees with -42.9% YoY growth; based in Salvador, Brazil; offers security services including pentest, project creation, and process integration.
Intrusion Cyber
Intrusion Cyber is a Brazil-based private cybersecurity company specializing in penetration testing, incident response, and security assessments. With a team of 4 security experts, it emphasizes manual, hacker-style pentest methodologies; 479 monthly website visits; and a global rank of #2,889,699.
Mercado Tatais
Cybersecurity firm specializing in penetration testing, secure software solutions, and ethical hacking; 3 employees with 100% YoY growth; headquartered in Brazil; offers services including penetration testing, front-end and backend development.
MITM Cyber Security Consulting
IT services and consulting company specializing in cybersecurity; offers penetration testing, ethical hacking, risk analysis, and compliance with LGPD and GDPR; based in São Paulo, Brazil, with 4 employees, founded in 2018, and offices in Ireland.
Netglobe Cyber Security
Cybersecurity firm offering penetration testing services with detailed methodologies based on MITRE ATT&CK and OWASP; headquartered in Campinas, São Paulo, Brazil, with a focus on people, processes, and technologies.
QuimeraX Intelligence
Cybersecurity company specializing in penetration testing, attack surface management, and risk identification; 3 employees in Brazil, founded 2024, with +300% YoY growth. Offers proactive threat detection and customized security solutions.