The watchTowr alternative built for the full attack surface
"Attacker view" tools only map your perimeter, Intruder provides the complete picture. Combine a powerful external view with deep visibility inside your cloud and web apps.
Unified, always on exposure management
watchTowr helps you map your external perimeter. Intruder gives you the full picture.
With more than 1,000 attack surface checks and powerful asset discovery across apps, APIs, and cloud accounts, Intruder uncovers what others miss. It also scans deeply for vulnerabilities and cloud misconfigurations, giving you true visibility across your environment.
Proactive protection for an active threat landscape
Attack surfaces never sit still, and neither does Intruder. With Emerging Threat Scans, we automatically detect and assess new vulnerabilities within hours of disclosure, helping you stay protected between scheduled scans.
Secure your cloud from the inside out
watchTowr flags an exposed service. Intruder traces it to the root cause - an IAM misconfiguration or open bucket - with native AWS, Azure, and Google Cloud connectors. See exposure and posture together so you can fix the cause faster.
See more than the perimeter
Get a complete picture of your risk. Intruder’s engine runs over 170,000 checks to provide comprehensive external, internal, and authenticated application scanning, finding critical risks across your entire stack.
Trusted by thousands of companies worldwide
Unparalleled insight into your attack surface
Search across your entire environment to see exactly what’s exposed. Discover open ports, services, and cloud assets before attackers do, and monitor for changes in real time to stay ahead of threats.
Focus on what matters most
Intruder unifies Attack Surface Management, Vulnerability Management, and Cloud Security Posture Management into a single view of risk. By combining data from multiple scanners with contextual intelligence, Intruder highlights exposures that pose real-world threats - so your team can focus on fixing what truly matters.
A security partner, not just a data provider
You're not just buying a data feed; you're gaining a security partner. Our support team is consistently praised on G2 and Gartner for being responsive, knowledgeable, and invested in your success. Whether it's prioritizing a new threat or understanding a complex finding, we're here to help you get to an outcome.
Automate your remediation workflows
Findings are automatically converted into actionable, two-way synced tickets in Jira, Azure DevOps, and ServiceNow. Real-time alerts in Slack and Microsoft Teams keep everyone in the loop, while one-click re-scans instantly verify that a fix is working.
The easiest to use
Intruder is easy to set up, use and maintain. On G2, we’re rated 9.6/10 on ease of set up, ease of use, and ease of admin.
See how easy Intruder is with a 14-day free trial.
See what real users think of Intruder
Ben Camilleri
CTO at Westhaven Association
Intruder checks your systems for 75+ web-layer security problems (such as SQL injection and cross-site scripting), 140,000+ infrastructure weaknesses (such as remote code execution flaws), and other security misconfigurations (such as weak encryption configurations, and systems which are unnecessarily exposed). Learn more about what checks we run.
Intruder’s emerging threat scans check your systems for newly discovered vulnerabilities automatically. This kind of proactive action is essential for businesses that don’t have processes in place to research the latest threats and manually run scans for them. Learn more.
Our team of experienced penetration testers will seek to identify serious weaknesses in your external targets that are undetectable by scanners. Continuous penetration testing is a bolt-on service available to Enterprise users and is sold and booked by the day. Learn more.
Intruder is powered by industry-leading scanners, including Tenable, Nuclei, OpenVas, and ZAP. Learn more.
