Pentesys

Pentesys is a UK-based cybersecurity company that provides external attack surface management, penetration testing and adversary simulation services delivered through a unified platform called the Pentesys Portal. The company's offering is structured around four connected solutions: Foundation, which helps organisations prepare for Cyber Essentials certification by identifying control and evidence gaps; Expose, which provides continuous, AI-powered discovery and monitoring of an organisation's external attack surface to identify unknown or exposed assets; Validate, which delivers expert-led penetration testing to confirm exploitable vulnerabilities and provide remediation guidance; and Adversary, which conducts red-team style engagements simulating real-world attacker behaviour such as phishing, external intrusion and cloud compromise to test organisational defences. Findings from automated discovery are combined with human-verified analysis, and customers can track risk priorities, evidence, remediation ownership and progress through the portal. The company targets enterprises and security teams needing to demonstrate exposure reduction to customers, boards, insurers or regulators, and provides executive-level reporting to support this. Pentesys is registered in England and Wales, holds CREST accreditation for penetration testing in EMEA, is Cyber Essentials certified, and is a signatory to the CREST AI Charter. The company positions itself around continuous threat exposure management (CTEM) principles, combining scanning, identification, prioritisation, remediation guidance and proof of risk reduction.