Strengthen your security with

expert penetration testing​.

Here at Red Citadel, we help businesses identify security weaknesses before attackers can exploit them.

We take a practical, results-driven, and supportive approach to security. Our team delivers expert penetration testing across Web Applications, Internal Infrastructure, External Infrastructure, APIs, and Mobile Applications.

We also deliver a wide-range of auditing services, including: AWS and Azure Cloud Platforms, Microsoft 365 Security Audits, Vulnerability Assessments, and IASME certifications, including Cyber Essentials (CE/CE+).

Whether you’re a small business or a growing enterprise, we’re here to help you stay secure, compliant, and happy.

CREST Certified

Industry-recognised code of conduct

Secure Testing

Protecting your data & systems

Thorough Analysis

Comprehensive security review

Proven Results

Actionable recommendations

Our Services

Our experts identify security flaws in your websites &applications, including authentication weaknesses, logic flaws, and code vulnerabilities, helping you safeguard users and business data.

We simulate insider threats & compromised devices on the network to uncover vulnerabilities before attackers do. This ensures your internal systems and sensitive data remain protected.

Our team tests your internet-facing systems from an attacker’s perspective, exposing vulnerabilities and weaknesses that could lead to a breach. Helping to secure your perimeter and assets.

We test the security of your APIs, identifying flaws such as weak logic errors, authentication, and data exposure. This helps safeguard sensitive data and ensure reliable integrations.

We test mobile applications across iOS and Android. Our testing covers storage, authentication, and API communication. This helps your applications stay secure, resilient, and able to protect user data.

We perform comprehensive scans to detect misconfigurations, missing patches, and common weaknesses. Our clear reporting helps you prioritise fixes and reduce your attack surface.

We review & harden your Microsoft 365 environment, ensuring security controls such as MFA, access policies, and data protection are correctly implemented and resilient against attack.

We assess the security of your cloud platforms and configurations, identifying risks such as misconfigurations, identity issues, and access exposures across Azure and AWS.

We guide you through achieving certification, helping you meet UK government-backed security standards. Demonstrate compliance, reduce cyber risk, and build trust with your clients.

What sets us apart from the competitors?

We don’t wait until testing is complete to deliver results.

We give short daily round-up meetings to share findings of any level of criticality, enabling you to act quickly and efficiently before the final report is produced.

These sessions also help eliminate false positives or misunderstandings that could otherwise unnecessarily bloat the report.

We work closely with your team throughout the engagement.

From the initial quote, pre-testing checks, through the testing process, supporting remediation and knowledge transfer every step of the journey.

You’re not just buying a penetration test, you’re buying collaboration and support too.

More than just a PDF.

In addition to pre- and post-test support and detailed reports, we provide video proof-of-concepts to demonstrate exactly how vulnerabilities can be exploited in the real world.

This allows you to quickly understand the impact and makes it easier to share findings with internal teams, helping to accelerate development and resolution times.

Our findings aren’t just CVSS scores.

Where possible, we map each vulnerability to real-world threats, showing how they could be exploited.

By aligning this with your company’s risk appetite and existing knowledge, we help you understand the true impact of vulnerabilities. This enables your team to prioritise remediation, make informed decisions, and strengthen defences against active attacks.

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