Strengthen your security with our

expert penetration testing​.

Red Citadel helps companies find and fix security weaknesses before attackers can take advantage of them, with a clear rate of £1000 per day plus VAT. We keep the process practical, transparent and supportive from the first conversation through to remediation.

We provide penetration testing across Web Applications, Internal and External infrastructure, APIs, and Mobile Applications, along with Security Auditing for AWS, Azure, Microsoft 365, Vulnerability Assessments and IASME certifications, including Cyber Essentials.

What sets us apart is how we work: We share findings as we uncover them to avoid unnecessary report noise. We stay closely involved with your team throughout the engagement, offering guidance and collaboration rather than leaving you with a static document.

Our reports focus on clarity and real impact, where possible including video proof of how issues to help your team understand and fix them quickly. We also map findings to real attack paths so you can prioritise what matters based on your company’s risk appetite.

There are no vague quotes, no hidden extras and no jargon. You always know where you stand, and you get a testing process that is clear, efficient and genuinely helpful.

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 and systems

Thorough Analysis

Comprehensive security reviews

Proven Results

Actionable recommendations

Our Services

We deliver security solutions with precision, integrity, and dedication.

Our team of experienced professionals take the time to understand your unique challenges, ensuring every engagement is thorough, efficient,
and tailored to your needs. You can depend on us to work with discretion, honesty, and a commitment to going the extra mile for you.

Whether its Penetration Testing your system or defences, Security Auditing your cloud environments, or helping you achieve Cyber Essentials,
we provide clarity and confidence at every step. With us, you gain a trusted partner who takes your security and prioritues as seriously as you do.

Web Application Penetration Testing

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

Learn more

Internal Infrastructure Penetration Testing ​

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.

Learn more

External Infrastructure Penetration Testing ​

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.

Learn more

API Penetration Testing

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.

Learn more

Mobile Application Penetration Testing

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.

Learn more

Vulnerability Assessment Scans

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

Learn more

M365 Security Audits​​

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.

Learn more

Azure & AWS Cloud Security Audits

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

Learn more

Cyber Essentials ​​Assessments

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.

Learn more

What sets us apart from the competitors?

We blend technical expertise with an understanding of what our clients need.

Take a look below at what we believe truly sets us apart:

Agile Delivery of Findings


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.

Clear and Actionable Insights


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.

Mapped to Real-World Threats


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.

Hands-On Collaboration


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.

Get In Touch

Our team are ready to help you strengthen your company and systems.

Whether you are launching a new platform, expanding an existing service, or reviewing your defences, we can provide a tailored engagement that meets your needs.

Contact us today to discuss your requirements and see how we can help you protect your business with confidence.

Contact Us
View Our Services
Scroll to Top