Penetration Testing& Cyber SecurityThat Finds What Scanners Miss
UK-based security experts who manually test your applications, networks, and infrastructure. Detailed reporting with actionable fixes — not just a list of CVEs.
What we test
Our certified security experts cover every attack surface — from your web apps to your people.
Web Application Testing
Manual and automated testing of your web applications against OWASP Top 10 and beyond. We test authentication, session management, API endpoints, and business logic flaws.
Stealer Logs & Dark Web Monitoring
Proactive monitoring of dark web forums and stealer logs for compromised employee credentials. We alert you before attackers can use them.
Architecture & Infrastructure Review
Full security audit of your IT architecture — cloud configurations, network segmentation, access controls, and compliance posture.
Social Engineering & Phishing
Test your human firewall with realistic phishing campaigns, vishing calls, and physical security assessments. Includes staff awareness training.
Not sure which service you need?
Talk to a security expertHow it works
We follow OWASP, PTES, and NIST methodologies to ensure thorough, repeatable results.
Discovery & Scoping
We define the scope, map your attack surface, and gather intelligence — the same way a real attacker would.
Vulnerability Assessment
Automated scanning combined with manual techniques to identify weaknesses in systems, apps, and configurations.
Exploitation & Testing
We safely exploit vulnerabilities to understand their real-world impact and how far an attacker could get.
Reporting & Remediation
A prioritised report with clear findings, risk ratings, and step-by-step remediation guidance your team can act on.
Why choose XL Marketing?
Our team of certified ethical hackers has protected hundreds of UK businesses. We combine deep technical expertise with clear communication — you get actionable insights, not jargon-filled reports that sit in a drawer.
Get your free assessmentCertifications & Accreditations
Transparent pricing
All packages include comprehensive reporting and expert remediation guidance.
Essential
Starting from
For small businesses and startups
- Web application testing (up to 3 apps)
- Basic vulnerability assessment
- OWASP Top 10 coverage
- Executive summary report
- 48-hour turnaround
- Remote testing only
- Email support
Professional
Average investment
Our most popular package for growing businesses
- Everything in Essential, plus:
- Up to 5 environments tested
- Stealer logs & credential monitoring
- Social engineering assessment
- Detailed technical report
- 2-week delivery
- Remediation guidance
- Phone & email support
Enterprise
Custom pricing
Comprehensive security for large organisations
- Everything in Professional, plus:
- Unlimited environments
- Architecture review included
- Development team to fix issues
- Government standard compliance
- 4-week engagement
- Quarterly retesting
- 24/7 priority support
- On-site testing available
What our clients say
“XL Marketing's penetration testing revealed critical vulnerabilities we never knew existed. Their team not only found the issues but helped us fix them quickly.”
James Harrison
CTO, TechFlow Solutions
“The most thorough security assessment we've ever had. The report was incredibly detailed yet easy to understand. We now have complete confidence in our security posture.”
Sarah Mitchell
IT Director, Global Finance Ltd
“Their dark web monitoring service found our compromised credentials within hours. This proactive approach saved us from a potential disaster.”
Michael Chen
Security Manager, RetailChain UK
Still have questions about our penetration testing services?
Frequently asked questions
Everything you need to know about our penetration testing services.
Still have questions?
Get in touchCyber Security Resources
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Read MoreThe cost of doing nothing
Cyber threats are not hypothetical. These are the real numbers UK businesses face every day.
of UK SMEs that suffer a cyber attack go out of business within 6 months.
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A penetration test identifies your vulnerabilities before attackers do. It's the most cost-effective way to protect your business, your customers, and your reputation.
Case studies
How we've helped UK businesses strengthen their security posture.
Major UK Bank Security Overhaul
Legacy systems with critical vulnerabilities exposing customer data.
Comprehensive penetration testing and architecture review.
“XL Marketing's team identified vulnerabilities our internal audits missed. Their expertise saved us from a potential catastrophe.”
Key results
- All critical vulnerabilities identified
- PCI DSS compliance guidance provided
- Detailed remediation roadmap delivered
- Ongoing security recommendations
NHS Trust Ransomware Prevention
Ransomware threats targeting patient data and critical systems.
Dark web monitoring and proactive security hardening.
“Their dark web monitoring found compromised staff credentials before criminals could use them. Absolutely vital service.”
Key results
- Compromised credentials identified
- Ransomware prevention measures deployed
- System security hardened
- DSPT compliance guidance provided
Retail Customer Data Protection
High-volume transaction processing with outdated security controls.
Web application testing and continuous security monitoring.
“The ROI on their penetration testing was immediate. We prevented breaches that would have destroyed our reputation.”
Key results
- Critical payment flow vulnerabilities found
- Payment security improved
- Compliance requirements met
- Security posture strengthened
Ready to secure your business?
Join hundreds of UK businesses that trust XL Marketing to protect their digital assets.
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