Exceptional does not have to be expensive.

Red Citadel is a CREST-accredited penetration testing company, providing high-quality cyber security services that are affordable, practical and accessible.

Our penetration testing services start from £750 per day plus VAT, helping companies of all sizes access experienced, professional security testing without unnecessary cost or complexity.

Throughout each engagement, we work closely with your team, share clear and actionable findings early, and help you understand and resolve issues quickly. Our reports focus on genuine risk, practical remediation and the information needed to prioritise improvements effectively.

We provide:
Penetration Testing: Web Apps, Internal & External infrastructure, PCI-DSS, APIs, Mobile Apps, AI/LLM, & Vulnerability Assessments.
Cloud Security Auditing: AWS, Azure, and Microsoft 365.
IASME Assessments: Cyber Essentials, Cyber Essentials Plus, and IASME Cyber Assurance.

Our goal is simple, to deliver high-quality security work and build long-term partnerships with the companies we support.

Complete Cyber Security Support

Helping to protect your systems, data, and company

Thorough Analysis and Findings

Comprehensive
security tests, audits, and reports

Actionable Results That Matter

Clear, actionable findings shared quickly, with no bloat

Trusted Partners in Cyber Security

Focused on your long-term
goals and success

Strengthen your company’s cyber security today.

Contact us today to discuss your requirements and see how we can help you secure and protect your company’s systems with confidence.

Our Testimonials

Don’t just take our word for it, see what our valued clients have to say.

Our Services

We deliver cyber security services with precision, integrity and dedication.

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 conduct targeted testing aligned with PCI-DSS requirements to assess the security of cardholder data environments to help validate compliance and a secure payment processing environment. 

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 assess how well your staff and processes resist real world social engineering. Through controlled phishing, vishing and impersonation, we uncover gaps in awareness and help improve your human defences.

We test AI and LLM-powered systems to identify prompt injection, unsafe outputs, and integration risks, helping secure your models, data, and applications.

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

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?

We combine technical expertise with a genuine understanding of what our clients need.


We do not wait until testing is complete to share results.

During the engagement, we provide daily round-up meetings to discuss findings at every level of criticality. This allows your team to begin investigating and resolving issues before the final report is produced.

These sessions also give us the opportunity to clarify findings, eliminate misunderstandings and remove false positives that could otherwise add unnecessary noise to the report.


You receive more than just a PDF.

Alongside pre-test support, post-test guidance and a detailed written report, we provide video proof-of-concepts that demonstrate how identified vulnerabilities could be exploited in practice.

This helps your team understand the impact quickly and makes findings easier to share with developers, technical teams and other stakeholders, supporting faster remediation.


Our findings go beyond CVSS scores.

Where appropriate, we map vulnerabilities to relevant real-world threats and explain how they could be used as part of a wider attack.

By considering your systems, existing controls and risk appetite, we help you understand the genuine impact of each finding. This enables your team to prioritise remediation, make informed decisions and strengthen defences against realistic attack scenarios.


We work closely with your team throughout the entire engagement.

From the initial scoping and quotation process through to pre-testing checks, active testing, remediation support and knowledge transfer, we provide clear communication and practical guidance at every stage.

You are not simply buying a penetration test. You are gaining a security partner who will work alongside your team and support you throughout the process.

Get In Touch

Our team is ready to help strengthen your systems and improve your company’s security.

Whether you are launching a new platform, expanding an existing service or reviewing your current defences, we can provide a tailored engagement built around your requirements.

Contact us today to discuss your objectives and find out how Red Citadel can support your company with practical, effective cyber security services.

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