Intruder

Intruder is a continuous vulnerability scanner and attack surface management platform monitoring internet-facing systems and cloud infrastructure to identify security weaknesses before exploitation. The platform automatically discovers new services exposed to the internet and scans for the latest vulnerabilities within hours of public disclosure, combining multiple scanning engines with proprietary intelligence to perform over 9,000 security checks across network infrastructure, web applications, and cloud environments (Amazon Web Services, Azure, Google Cloud).

Intruder integrates threat intelligence including CISA Known Exploited Vulnerabilities (KEV) list and Exploit Prediction Scoring System (EPSS) to prioritize vulnerabilities based on actual exploitation likelihood rather than generic severity scores. The platform filters false positives and provides detailed remediation guidance in concise, actionable formats without requiring deep security expertise, making enterprise-grade vulnerability scanning accessible to lean security teams.

Founded in 2015 by Chris Wallis and headquartered in London, Intruder serves over 3,000 customers across managed service providers (MSPs), small and medium-sized businesses, and enterprises in finance, healthcare, technology, and government sectors. The company achieved $16.1 million in revenue in 2024 with consistent year-over-year growth, earning recognition as the #215 fastest-growing company in Europe by the Financial Times and Statista in 2024.