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.

UK Penetration Testing

Find Your Weak Points Before An Attacker Does

Cyber attacks against UK businesses are no longer rare, and they are no longer aimed only at the giants. Small and mid-sized organisations are now squarely in the crosshairs of opportunistic attackers, ransomware groups and credential-stuffing bots — and the consequences of a breach run far beyond the immediate cost. Lost data, downtime, regulatory fines, contractual penalties and the reputational damage of explaining the incident to customers all add up quickly.

A penetration test puts that risk under a microscope. Our certified ethical hackers attempt to break into your systems, applications and networks in the same way a real attacker would — safely, in a controlled engagement, with your full knowledge and consent. The result is a clear, prioritised report of what an attacker can actually do today, and a practical, plain-English plan for closing those gaps.

A Full Range Of Security Assessments

We test everything that faces the modern threat landscape — web applications, APIs and SaaS platforms, internal & external networks, cloud environments (Azure, AWS, Microsoft 365), mobile apps, phishing & social engineering and dark-web monitoring for compromised credentials. Engagements are aligned with the OWASP Top 10, PTES and CREST methodologies, and every test concludes with a free retest so you can confirm fixes are in place before sign-off.

Reports You Can Actually Use

A good pen test is only as useful as the report it produces. We deliver two — an executive summary written for business leaders and boards, and a detailed technical report for your IT or development team with reproducible steps, evidence, CVSS scores and remediation guidance. Need to hand the results to an auditor, insurer or enterprise customer? The report is built with ISO 27001, Cyber Essentials Plus and SOC 2 expectations in mind, so it stands up to scrutiny.

Whether you're running an annual security audit, preparing for a tender, responding to a customer security questionnaire or proactively hardening your environment before launch, our team can scope the right test for the situation. Get in touch using the form below for a no-obligation scoping conversation.

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.

OWASP Top 10API SecurityAuthentication TestingSession Management

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.

24/7 MonitoringInstant AlertsCredential RecoveryThreat Intelligence

Architecture & Infrastructure Review

Full security audit of your IT architecture — cloud configurations, network segmentation, access controls, and compliance posture.

Cloud SecurityNetwork SegmentationAccess ControlsCompliance Check

Social Engineering & Phishing

Test your human firewall with realistic phishing campaigns, vishing calls, and physical security assessments. Includes staff awareness training.

Email PhishingVishing TestsPhysical SecurityStaff Training

Not sure which service you need?

Talk to a security expert

How it works

We follow OWASP, PTES, and NIST methodologies to ensure thorough, repeatable results.

01

Discovery & Scoping

We define the scope, map your attack surface, and gather intelligence — the same way a real attacker would.

02

Vulnerability Assessment

Automated scanning combined with manual techniques to identify weaknesses in systems, apps, and configurations.

03

Exploitation & Testing

We safely exploit vulnerabilities to understand their real-world impact and how far an attacker could get.

04

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 assessment

Certifications & Accreditations

CREST Approved
ISO 27001
Cyber Essentials Plus
CHECK Team Leader
All tests conducted under strict NDA with full liability insurance coverage.

Transparent pricing

All packages include comprehensive reporting and expert remediation guidance.

Essential

£1,500

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
Get started
MOST POPULAR

Professional

£2,500

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
Get started

Enterprise

£4,500+

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
Get started

Still have questions about our penetration testing services?

Frequently asked questions

Everything you need to know about our penetration testing services.

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