Razorthorn Security is a UK-based cybersecurity consultancy founded in 2007 by James Rees. The firm delivers digital security consulting and testing services to organisations across various sectors, including clients within the Fortune 500. Razorthorn's core service offerings fall into two main areas: consultancy and testing. On the consultancy side, the company provides cyber strategy development, managed cybersecurity services, ISO 27001 advisory, and PCI DSS consultancy and auditing. The firm holds Qualified Security Assessor (QSA) status, enabling it to conduct official PCI DSS audits, and has been recognised by Gartner as a market leader in PCI DSS QSA service delivery. On the testing side, Razorthorn offers penetration testing and vulnerability assessments, staffed by a dedicated team of penetration testers. The company holds several industry certifications, including ISO 27001, CREST accreditation, Cyber Essentials, CISSP, and CISM. It is also listed as a Crown Commercial Service supplier, indicating eligibility to serve UK public sector organisations. Razorthorn positions itself as a personalised, client-focused consultancy, developing tailored cybersecurity strategies aligned to individual business objectives, budgets, and compliance requirements. Services range from ad-hoc security consultancy to fully managed end-to-end cybersecurity solutions. The firm's stated mission is to defend business-critical data and applications from cyber attacks and internal threats.