ISO 27001 Certified Security Experts

Protect Your Business FromCyber ThreatsBefore They Strike

UK's leading penetration testing experts. We find vulnerabilities before hackers do, keeping your business secure and compliant.

10K+
Vulnerabilities Discovered
Get A Security Assessment Today
COMPREHENSIVE SECURITY SERVICES

Enterprise-Grade Penetration Testing

Our certified security experts use advanced techniques to identify vulnerabilities across your entire digital infrastructure before malicious actors can exploit them.

Web Application Testing

Comprehensive security testing for your web applications to identify vulnerabilities before attackers do.

2,500+
vulnerabilities
48-72hrs
time
  • OWASP Top 10
  • API Security
  • Authentication Testing
  • Session Management

Stealer Logs & Dark Web Monitoring

Proactive monitoring of dark web forums and stealer logs to detect compromised employee credentials.

500+
breaches
< 1hr
response
  • 24/7 Monitoring
  • Instant Alerts
  • Credential Recovery
  • Threat Intelligence

Architecture & Infrastructure Review

Complete security audit of your IT architecture identifying configuration weaknesses and design flaws.

1,000+
audits
£2.5M+
savings
  • Cloud Security
  • Network Segmentation
  • Access Controls
  • Compliance Check

Social Engineering & Phishing

Test your human firewall with sophisticated phishing campaigns and social engineering assessments.

750+
campaigns
+85%
awareness
  • Email Phishing
  • Vishing Tests
  • Physical Security
  • Staff Training

Not sure which service you need? Our security experts can help assess your requirements.

PROVEN METHODOLOGY

Our Penetration Testing Process

Following industry-standard methodologies including OWASP, PTES, and NIST frameworks to ensure comprehensive security coverage.

01

Discovery & Reconnaissance

We map your digital footprint, identifying all potential entry points and gathering intelligence like real attackers would.

02

Vulnerability Assessment

Using automated tools and manual techniques, we identify weaknesses in your systems, applications, and configurations.

03

Exploitation & Testing

We safely attempt to exploit vulnerabilities to understand their real-world impact on your business operations.

04

Reporting & Remediation

Receive a detailed report with prioritized findings, remediation guidance, and executive summary for stakeholders.

Why Choose XL Marketing for Penetration Testing?

15+
Years Experience
500+
Tests Completed
100%
Client Retention
24/7
Security Support

Our team of certified ethical hackers has protected hundreds of UK businesses from cyber threats. We combine technical expertise with business acumen to deliver actionable security insights.

Our Certifications & Accreditations

CREST
ISO 27001
Cyber Essentials Plus
CHECK Team Leader

All tests conducted under strict NDA with full liability insurance coverage

TRANSPARENT PRICING

Penetration Testing Packages

Choose the security assessment package that best fits your needs. All packages include comprehensive reporting and expert remediation guidance.

Essential

£1,500

Starting from

Perfect 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
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

Enterprise

£4,500+

Custom pricing

Comprehensive security for large organizations

  • 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

Don't just take our word for it - hear from businesses we've helped secure

"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. Outstanding service!"

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. Highly recommended!"

Michael Chen

Security Manager, RetailChain UK

Still have questions about our penetration testing services?

Our security experts are here to help

SECURITY ALERT

Your Business Is Under ThreatRight Now

Active Cyber Threats Detected Today

0

And counting...

60% of SMEs

Go out of business within 6 months of a cyber attack

£2.9 Million

Average cost of a data breach in the UK

Every 39 Seconds

A cyber attack occurs somewhere in the world

Don't wait until it's too late. Our penetration testing can identify your vulnerabilities before cybercriminals do. Protect your business, your customers, and your reputation.

ISO 27001 Certified
CREST Approved
500+ Tests Completed
PROVEN RESULTS

Real Security Victories

See how we've helped UK businesses transform their security posture and protect their most valuable assets from cyber threats.

£50M+
Breach Costs Prevented
1,500+
Vulnerabilities Fixed
100%
Client Retention Rate
24/7
Security Monitoring
Financial Services

Major UK Bank Security Overhaul

The Challenge

Legacy systems with 50+ critical vulnerabilities exposing customer data

Our Solution

Comprehensive penetration testing and architecture review

"XL Marketing's team identified vulnerabilities our internal audits missed. Their expertise saved us from a potential catastrophe."
Chief Information Security Officer

Key Results

  • 100% vulnerability remediation
  • PCI DSS compliance achieved
  • £2.5M potential breach costs avoided
  • Customer trust score increased 40%
Healthcare

NHS Trust Ransomware Prevention

The Challenge

Ransomware threats targeting patient data and critical systems

Our Solution

Dark web monitoring and proactive security hardening

"Their dark web monitoring service found compromised staff credentials before criminals could use them. Absolutely vital service."
IT Security Manager

Key Results

  • 15 compromised credentials recovered
  • Zero ransomware incidents post-implementation
  • 99.9% system uptime maintained
  • DSPT compliance maintained
E-commerce

Retail Giant Customer Data Protection

The Challenge

Processing 100K+ daily transactions with outdated security

Our Solution

Web application testing and continuous security monitoring

"The ROI on their penetration testing was immediate. We prevented breaches that would have destroyed our reputation."
E-commerce Director

Key Results

  • 37 critical vulnerabilities patched
  • Payment card fraud reduced 95%
  • £500K annual security costs saved
  • Customer checkout conversion +15%

Ready to Secure Your Business?

Join hundreds of UK businesses that trust XL Marketing to protect their digital assets.