Intruder

Intruder is a London-based cybersecurity company founded in 2015. It offers a cloud-based vulnerability scanning and attack surface management platform that helps organizations identify and prioritize security weaknesses. The company was established by Chris Wallis, a former ethical hacker, to address challenges in vulnerability management by providing timely alerts and prioritization of security issues. Intruder's primary product is a continuous vulnerability scanner that automatically discovers new internet-facing services and scans cloud infrastructures for vulnerabilities. Key features include automated discovery, risk-based prioritization, and continuous penetration testing. The platform is designed to be user-friendly, providing actionable remediation guidance without requiring deep security expertise. Intruder serves over 3,000 customers globally, including managed service providers, small and medium-sized businesses, and large enterprises across various sectors such as finance, healthcare, and technology. The company has experienced significant growth and has raised $63 million in funding to date.

• Cloud-based vulnerability scanning: external/internal
• emerging-threat scans
• attack surface monitoring
• clean reporting

Per-target subscription tiers (from ~$100s/month)