Let’s be honest – in today’s digital world, keeping your business safe from cyber threats isn’t optional. Vulnerabilities lurk everywhere, from your network to your applications, and spotting them early can save a lot of headaches down the line. But with so many firms out there offering vulnerability assessments, it’s easy to get overwhelmed. That’s why we’ve put together a straightforward guide to the best vulnerability assessment companies in the UK – the ones that actually understand security, know how to find the weak spots, and help you fix them before trouble hits.
1. A-Listware
We provide a broad range of software development and consulting services, with a strong focus on creating secure and dependable digital solutions. Our teams become an extension of your company, working closely with you to ensure smooth communication and steady progress throughout your projects. We handle both cloud-based and on-premises infrastructure management, aiming to keep your systems running seamlessly while addressing potential vulnerabilities at every stage.
Cybersecurity is one of the many areas we cover alongside software development, application services, and IT consulting. Thanks to our large pool of carefully vetted IT professionals, we build teams that fit your technical needs and company culture. We pride ourselves on quick team setup and flexible engagement models, so we can adapt as your project requirements change or grow.
Key Highlights:
- Dedicated teams that integrate with your existing workflows
- Full management of cloud and on-premises infrastructure
- Access to a wide network of skilled IT professionals
- Flexible and scalable service models
- Focus on clear and consistent communication
Services:
- Software Development
- Cybersecurity Services
- Application Services
- IT Consulting
- Infrastructure Services
- Dedicated Development Teams
- Testing and Quality Assurance
- Help Desk and Support Services
Contact Information:
- Website: a-listware.com
- Email: info@a-listware.com
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
- Address: St. Leonards-On-Sea, TN37 7TA, UK
- Phone Number: +44 (0)142 439 01 40
2. N-iX
They focus on identifying weaknesses in IT systems to help reduce the risk of breaches and security incidents. Their vulnerability assessment services cover a thorough examination of IT infrastructure and applications, combining automated scanning with manual validation to ensure the accuracy of findings. The team works to map vulnerabilities against known attack techniques, offering practical insights to help prioritize remediation based on real-world risks. Their approach spans various environments including networks, hosts, databases, web and mobile applications, and wireless connections.
The process typically starts by defining the scope with stakeholders, followed by detailed scanning and analysis. They provide comprehensive reporting that includes technical details and summaries tailored for decision-makers, along with recommendations for addressing vulnerabilities. In addition to assessments, N-iX offers guidance and support for implementing fixes to strengthen overall security posture and maintain ongoing protection.
Key Highlights:
- Combines automated scanning with manual vulnerability validation
- Covers broad infrastructure areas: networks, hosts, databases, applications, wireless
- Maps vulnerabilities to known attack techniques (MITRE ATT&CK framework)
- Detailed reports with actionable recommendations and risk prioritization
- Structured process including scope definition, assessment, analysis, reporting, and follow-up
Services:
- Automated Vulnerability Scanning
- Manual Review and Validation
- Network Discovery and Mapping
- Threat Prioritization
- Vulnerability Mapping
- Reporting and Remediation Guidance
- Cloud and On-Premises Infrastructure Assessment
- Web and Mobile Application Security
Contact Information:
- Website: www.n-ix.com
- E-mail: contact@n-ix.com
- Facebook: www.facebook.com/N.iX.Company
- Twitter: x.com/N_iX_Global
- LinkedIn: www.linkedin.com/company/n-ix
- Address: London EC3A 7BA, 6 Bevis Marks
- Phone: +442037407669
3. Leading Security
Leading Security offers vulnerability assessments designed to give organizations a clear picture of their attack surface. Their process combines scanning tools with manual validation and expert analysis to identify known weaknesses across systems, networks, and configurations. Rather than focusing on exploitation like penetration testing, they aim to classify vulnerabilities by severity and relevance, helping clients understand the real risks and prioritize fixes accordingly. This approach suits companies looking for ongoing security assurance or those still building their security maturity.
Their services are especially useful for organizations scaling quickly, integrating new technologies, or needing to show compliance with security standards. The focus is on helping clients stay ahead of threats by regularly evaluating their infrastructure and providing practical insights that support continuous improvement in security posture.
Key Highlights:
- Structured evaluation of systems, networks, and configurations
- Combines automated scanning with manual validation
- Focus on risk classification and prioritization
- Suitable for companies early in security maturity or scaling fast
- Supports compliance and ongoing security assurance
Services:
- Vulnerability Scanning
- Manual Vulnerability Validation
- Risk Classification and Prioritization
- Attack Surface Mapping
- Security Posture Reporting
- Compliance Support
- Continuous Vulnerability Monitoring
Contact Information:
- Website: leadingsecurity.co.uk
- E-mail: contact@leadingsecurity.co.uk
- Twitter: x.com/lsecuk
- Address: Suite 3264 Unit 3a 34-35 Hatton Garden, Holborn, London, England, EC1N 8DX
4. Heretek
Heretek approaches vulnerability assessments with a focus on uncovering hidden weaknesses in critical systems through thorough testing conducted by certified experts. Their assessments are designed to be quick to set up and deliver valuable insights rapidly, which suits organizations needing fast feedback on their security posture. The process covers large networks efficiently, allowing for scalable testing of many devices without driving costs up.
They also offer a range of complementary services such as penetration testing and adversary simulations, which can provide a more complete picture of potential risks. The emphasis is on helping clients understand where their vulnerabilities lie, enabling them to prioritize actions that improve security without excessive complexity or expense.
Key Highlights:
- Rapid assessment setup and delivery
- Scalable testing across extensive networks
- Cost-effective approach to broad vulnerability coverage
- Conducted by certified security professionals
- Supports complementary security services
Services:
- Vulnerability Assessments
- Penetration Testing
- Adversary Simulation
- Purple Team Exercises
- Managed Vulnerability Service
- Security Advisory Services
Contact Information:
- Website: heretek.co.uk
- E-mail: info@heretek.co.uk
- Twitter: x.com/HeretekLtd
- LinkedIn: www.linkedin.com/company/heretek
- Phone: (+44) 02071 013849
5. Inventas
Inventas approaches vulnerability assessments as an essential part of maintaining overall cybersecurity health. They focus on identifying gaps in systems, networks, and applications that could be exploited by attackers. Their process involves scanning for weaknesses, prioritizing the risks based on their severity, and offering guidance on how to fix those vulnerabilities. The goal is to help organizations stay proactive about security rather than waiting for issues to become critical.
The team at Inventas emphasizes the importance of regular assessments, much like routine health check-ups, to keep pace with evolving threats and changes in IT environments. They aim to support businesses in maintaining a strong defense over time by continually spotting and addressing vulnerabilities before they turn into real problems.
Key Highlights:
- Systematic scanning for security weaknesses
- Risk prioritization based on potential impact
- Focus on regular, ongoing assessments
- Clear guidance for remediation steps
- Support tailored to maintain long-term security
Services:
- Vulnerability Assessments
- Cyber Security Support
- IT Services
- Cyber Essentials Certification
- Cloud Services
Contact Information:
- Website: www.inventas.co.uk
- E-mail: info@inventas.co.uk
- Facebook: www.facebook.com/people/Inventas/100067123878237
- Twitter: x.com/inventas
- LinkedIn: www.linkedin.com/company/inventas-ltd
- Address: 2 Norbury Road Reigate Surrey RH2 9BY United Kingdom
- Phone: +44 (0) 1737 222900
6. Seriun
Seriun approaches vulnerability assessments by focusing on a clear understanding of their client’s systems and infrastructure before any testing begins. They gather information about network layouts, asset inventories, and configurations to ensure their evaluation covers all relevant points. Using a combination of automated tools and manual techniques, they identify vulnerabilities such as outdated software, misconfigurations, or unsecured access points. The process aims to map out weaknesses without interrupting day-to-day operations, and they work closely with IT teams throughout.
After the assessment, Seriun prioritizes vulnerabilities based on how severe they are and the potential impact on the business. They then provide a detailed report with practical recommendations and collaborate on a plan to address these issues. Their approach includes ongoing vulnerability management, helping organizations maintain their security posture over time and adapt to new threats as they emerge.
Key Highlights:
- Comprehensive asset discovery and prioritization
- Use of automated scanning alongside manual checks
- Collaboration with client IT teams during assessments
- Prioritization of vulnerabilities by risk level
- Support for ongoing vulnerability management
Services:
- Vulnerability Assessments
- Manual and automated security testing
- Remediation planning and reporting
- Continuous monitoring and management
- Cybersecurity advisory and support
Contact Information:
- Website: www.seriun.co.uk
- E-mail: info@seriun.co.uk
- Facebook: www.en-gb.facebook.com/seriun
- Twitter: x.com/Seriun
- LinkedIn: www.linkedin.com/company/seriun-limited
- Instagram: www.instagram.com/seriun_tech
- Address: Unit 9 Vantage Court, Riverside Way, Barrowford, England, BB9 6BP
- Phone: 01282 500770
7. CYFOR Secure
CYFOR Secure provides vulnerability assessments designed to spot weaknesses in both internal and external systems. They focus on quickly identifying risks and helping clients understand which areas need attention. Their process involves detailed scanning supported by a proprietary tool that can analyze all devices connected via wired or wireless networks. The results come with clear reports and recommendations aimed at practical ways to reduce vulnerabilities, with ongoing support to help maintain security.
They also offer a managed service option that allows for continuous monitoring and regular updates on the security posture. CYFOR’s team works with clients to prioritize threats and provide strategic advice tailored to their specific business needs. The assessments are positioned as a useful tool not just for compliance but for improving overall cyber resilience and planning for incidents.
Key Highlights:
- Combines internal and external vulnerability scanning
- Use of proprietary ‘pulse’ appliance for device analysis
- Regular notifications on prioritized risks
- Detailed reporting with actionable recommendations
- Option for continuous vulnerability management
Services:
- Vulnerability assessment scanning
- Managed vulnerability services
- Configuration and compliance checks
- Cyber resilience assessment
- Strategic security advice and support
Contact Information:
- Website: cyforsecure.co.uk
- E-mail: contact@cyforsecure.co.uk
- Twitter: x.com/cyforsecure
- LinkedIn: www.linkedin.com/showcase/cyfor-secure-cyber-security
- Phone: 0330 135 5756
8. Sentrium Security
Sentrium Security focuses on uncovering hidden weaknesses in a company’s digital infrastructure by thoroughly assessing systems, networks, and applications. Their approach involves a combination of automated scanning tools and expert analysis to identify vulnerabilities, which are then prioritised based on the potential risk they pose. They aim to give businesses clear insight into their security gaps so they can address the most pressing issues before they lead to breaches or other disruptions.
The company also highlights the importance of understanding the broader security context, working closely with clients to interpret findings and plan remediation steps. They provide ongoing support to help businesses maintain their security posture and improve resilience against emerging cyber threats. Their services are designed to complement internal teams by extending capacity and offering technical expertise where needed.
Key Highlights:
- Asset discovery covering all connected devices and systems
- Automated vulnerability scanning with severity prioritisation
- Detailed technical reporting to guide remediation
- Focus on continuous security and risk management
- Support for regulatory compliance and incident response planning
Services:
- Vulnerability assessments
- Network and infrastructure penetration testing
- Web application testing
- Mobile application penetration testing
- Cloud environment security assessments
- Internet of Things (IoT) testing
- Cyber security advisory and virtual CISO services
Contact Information:
- Website: www.sentrium.co.uk
- E-mail: info@sentrium.co.uk
- Twitter: x.com/sentriumsec
- LinkedIn: www.linkedin.com/company/sentriumsecurity
- Address: Harley House 29 Cambray Place Cheltenham GL50 1JN
- Phone: 01242 388 634
9. FluidOne
FluidOne approaches vulnerability assessment as more than just running automated scans. Their team, led by experienced technical leaders, digs deeper to interpret results in a way that makes sense commercially, offering practical advice alongside technical findings. This means businesses get a clearer understanding of their security gaps and actionable steps to address them rather than just raw data. They also offer support for implementing those fixes, which can be handled through their managed IT services.
The company acknowledges how overwhelming the sheer number of vulnerabilities can be for many businesses, especially given the increasing cyberattack rates in the UK. Their process focuses on identifying weaknesses, prioritising risks, and ensuring compliance with industry standards. Alongside risk reduction, they highlight the value in raising security awareness within organisations, helping teams stay alert to potential threats and reduce costly security incidents.
Key Highlights:
- Comprehensive analysis beyond automated scans
- Prioritisation of vulnerabilities based on business impact
- Support with remediation via managed IT services
- ISO 27001:2022 certification and regular independent audits
- Focus on boosting organisational security awareness
Services:
- Vulnerability assessments with tailored recommendations
- Managed IT service support for remediation
- Network infrastructure security reviews
- Compliance and regulatory support
- Cybersecurity consultancy and risk management
Contact Information:
- Website: www.fluidone.com
- E-mail: contact@fluidone.com
- Facebook: www.facebook.com/FluidOneUk
- Twitter: x.com/fluidoneuk
- LinkedIn: www.linkedin.com/company/fluidone
- Instagram: www.instagram.com/fluidoneuk
- Address: 5 Hatfields, London SE1 9PG
- Phone: 0345 868 7848
10. JC Cyber Security Services
JC Cyber Security Services takes a methodical approach to vulnerability assessments, focusing on identifying outdated software, misconfigurations, and unsupported systems that could open the door to cyber threats. Their process involves scanning infrastructure, websites, and applications, comparing the data against live vulnerability databases. The outcome is a report that flags areas of concern, allowing businesses to prioritise remediation and close security gaps before they’re exploited.
They also recognise how fast technology shifts and how business growth or change can widen the attack surface. By assessing risk across multiple layers of an organisation’s IT environment, JC Cyber Security helps teams understand not just where weaknesses exist but how to address them. Their assessments are designed to support ongoing improvement of a company’s overall security position, keeping systems and data more resilient to threats.
Key Highlights:
- Evaluates infrastructure, websites, and applications separately
- Assesses outdated software and weak configurations
- Results mapped against real-time vulnerability databases
- Helps businesses build targeted remediation plans
- Offers insight into current security posture
Services:
- Infrastructure vulnerability assessments
- Website vulnerability assessments
- Application vulnerability assessments
- Remote vulnerability scanning options
- Risk reporting and prioritised remediation guidance
Contact Information:
- Website: www.jc-cybersecurity.co.uk
- E-mail: info@jc-cybersecurity.co.uk
- Facebook: www.facebook.com/JCCyberServices
- LinkedIn: www.linkedin.com/company/jc-cyber-security-services-ltd
- Instagram: www.instagram.com/jccyberservices
- Address: Grosvenor House, St. Paul’s Square, Birmingham, B3 1RB, UK
- Phone: 0333 305 0605
11. Aptive Consulting
Aptive Consulting is a UK-based cyber security consultancy that offers vulnerability assessment services as part of its broader testing portfolio. Rather than actively exploiting vulnerabilities like a penetration test, their approach focuses on gathering as much evidence as possible to support findings – essentially detecting issues without attempting to breach them. They cover both applications and infrastructure, aligning with penetration testing workflows but stopping short of proof-of-exploit, so organizations receive insights without high-risk testing.
They list a wide range of scanning options including web application, mobile app, internal and external network assessments, and even PCI ASV‑style scans and IoT and firewall assessments. Their services are built to highlight the latest vulnerabilities in systems – whether you’re working on mobile apps, databases, or web servers – while delivering results in clear, structured formats for practical follow-up actions.
Key Highlights:
- Consultant-led assessments without exploitation
- Coverage includes applications, infrastructure, IoT, network, and firewall scanning
- Utilizes both automated scanning and expert review
- Supports ongoing identification of emerging vulnerabilities
- Aligned with OWASP-based methodologies and traditional pen test flows
Services:
- Vulnerability assessments (application & infrastructure)
- Web application scanning
- Mobile app scanning
- Network vulnerability scanning (external & internal)
- PCI ASV-style vulnerability scans
- IoT and firewall assessment scans
Contact Information:
- Website: www.aptive.co.uk
- E-mail: hello@aptive.co.uk
- LinkedIn: www.linkedin.com/company/aptive-consulting
- Address: 86-90 Paul Street London EC2A 4NE
- Phone: 03333 440 831
12. Samurai Security
Samurai Security offers structured vulnerability assessment services that examine the security posture of systems, networks, and applications. Their process starts with scoping, where they work with clients to define exactly what needs testing, then move into technical scanning and manual verification to reduce noise and false positives. They break down the findings with clear reporting and prioritisation so that businesses can figure out what to fix and in what order. This approach is grounded in practical risk reduction rather than just ticking compliance boxes.
Their assessment coverage spans external and internal networks, firewalls, and web applications, which gives organisations a decent overview of where things might be exposed. They also factor in specific compliance needs where relevant, adapting their methods to meet industry requirements like ISO 27001 or PCI-DSS. For clients that want more than a one-off scan, they also provide continuous support and scanning cycles, helping teams track remediation progress and avoid blind spots over time.
Key Highlights:
- Covers both internal and external systems
- Manual verification included to reduce false positives
- Reports are written with clarity and prioritisation in mind
- Support for regulatory compliance frameworks
- Ongoing scanning and advisory options available
Services:
- Web application vulnerability assessments
- Internal and external network assessments
- Firewall vulnerability reviews
- Vulnerability scanning and analysis
- Risk management guidance
- Remediation planning and advice
- Continuous support and monitoring
Contact Information:
- Website: samuraisecurity.co.uk
- E-mail: info@samuraisecurity.co.uk
- Facebook: www.facebook.com/samuraidigitalsec
- Twitter: x.com/samuraidigsec
- LinkedIn: www.linkedin.com/company/samuraidigitalsecurity
- Address: 107-111 Fleet Street, Ludgate House, London, EC4A 2AB
- Phone: 0121 740 1304
Conclusion
Finding the right partner for vulnerability assessments isn’t about flashy promises or who has the slickest website – it’s about who can actually help you uncover what’s lurking in your systems before someone else does. The companies we’ve looked at here all take slightly different routes to get there, but they share one thing: a focus on clarity, practical fixes, and tailoring their work to real-world risks. That’s what matters when the goal is staying one step ahead of threats.
Whether you’re running a small internal network or managing a more complex infrastructure, choosing a team that can dig deep without drowning you in jargon or noise is key. You want someone who doesn’t just drop a PDF on your desk and walk away. Good vulnerability assessment isn’t a one-time checkbox – it’s a piece of an ongoing process that actually helps your business stay secure and sane at the same time.
