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.

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Rob Webb profile picture
Rob Webb
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A great experience working with Patryk and Matthew at Red Citadel. They were both really helpful and thorough with the penetration testing for FUTERA, as part of our annual Cyber Essentials Plus accreditation. Everything was explained clearly, the process was straightforward and we felt well supported throughout. Thanks again to Patryk, Matthew and the Red Citadel team. Highly recommended!
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Manu Jose profile picture
Manu Jose
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Excellent experience getting our Cyber Essentials Plus audit done by Red Citadel. Patryk and Matthew were professional throughout, with clear, prompt communication at every stage. Their technical knowledge was strong they understood our environment quickly and asked the right questions. Turnaround was fast, with no chasing needed on our end. Findings were explained clearly and practically, not just handed over as a checklist, and they were happy to answer follow up questions. Highly recommend Red Citadel to anyone looking to get CE+ certified with a team that knows what they're doing
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Marko Macerl profile picture
Marko Macerl
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It was a pleasure working with Matthew and Patryk, who went above and beyond to make sure we were on track to obtain our Cyber Essentials Plus certification. I couldn't recommend them highly enough. They were always there for any questions or blockers we faced, ready to assist and support us. Thank you for being a great partner.
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Jonathan Neale profile picture
Jonathan Neale
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Excellent service, very friendly and helpful. We will certainly be a repeat customer.
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Michael N profile picture
Michael N
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We used RedCitadel for an application penetration test under a tight deadline. They were able to accommodate the timeframe although they needed to juggle other work. Communication was clear throughout the engagement and the final report was well structured and easy to act on. I would highly recommend them for application testing work.
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First Check Cyber profile picture
First Check Cyber
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Red Citadel helped us through both Cyber Essentials and Cyber Essentials Plus. The staff were always available when we had questions and gave us clear advice on what needed fixing, which made the process much less stressful than expected. We now feel far more confident that our devices and data are properly protected. A really helpful and professional service from start to finish.
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Admin LWTC profile picture
Admin LWTC
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We used Red Citadel for a penetration test and the whole process was very straightforward. Communication was good, the testing was completed quickly and the final report was clear without being full of unnecessary jargon. The guys were also happy to explain anything we wasn't sure about. We came away with a much better understanding of our risks and feel our systems are more secure as a result
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Jonny Bramwell profile picture
Jonny Bramwell
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We recently worked with Red Citadel on a penetration testing project and couldn't be happier with the experience. From the outset, they were responsive and clear in their communication, patient with our questions, and genuinely easy to deal with throughout. The testing was completed efficiently and ahead of schedule, with a thorough report delivered promptly afterwards. Matthew and the team made what could have been a stressful process straightforward and stress-free. We'll definitely be using Red Citadel again for future security work and would happily recommend them to anyone looking for a professional, reliable pen testing partner.
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Ryan Walker profile picture
Ryan Walker
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Patryk at Red Citadel was excellent to work with throughout our most recent penetration test. His in-depth knowledge of current attack vectors and the latest vulnerabilities gave us real confidence in our security posture and the recommendations provided. The documentation produced was thorough, clear, and genuinely useful for both technical review and future reference. Patryk was professional throughout the engagement and also a pleasure to work with. We look forward to working with Red Citadel again in the future.
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Permjeet Singh profile picture
Permjeet Singh
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We had a great experience working with Red Citadel for our Cyber Essentials and Cyber Essentials Plus certification covering our company laptops and internal systems used to support our care software platform, careVITALS. The team was easy to work with, highly responsive, and very hands-on throughout the process. They were proactive in helping us resolve issues quickly, provided clear guidance, and kept everything straightforward from start to finish. Excellent value for money, and we would highly recommend Red Citadel to any company looking for reliable cybersecurity and compliance support.

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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