The runZero alternative for securing your attack surface
Finding an asset is not the same as knowing if it's vulnerable. While runZero excels at building an inventory, Intruder focuses on actionable exposure management. We bridge the gap between knowing an asset exists and proving it is secure.
Don't just map your network - secure it
If your primary goal is to build a perfect list of every device on your network for IT management, runZero can be a great fit. But if your goal is to validate risk, prove compliance, and fix vulnerabilities across your stack, Intruder adds the critical security layer that pure inventory tools lack.
Validate risk, don't just infer it
runZero surfaces potential exposure through discovery and fingerprinting. Intruder confirms issues with active checks, including authenticated testing where relevant, so you can focus on real risk.
Go deeper than the network layer
Intruder’s engine runs 170,000+ checks across networks, apps, and APIs - including internal environments and behind logins - to find the critical risks external-only tools miss.
Move fast when new CVEs drop
Intruder runs Emerging Threat Scans as soon as checks are created, so you can quickly assess exposure to critical vulnerabilities like React2Shell and prioritize fixes.
Trusted by 3,000+ companies worldwide
Discovery that goes beyond IP scanning
runZero is excellent at scanning known IP ranges, but it can't find what it isn't told to look for. Intruder uses Passive DNS and Certificate Transparency to uncover "orphan" subdomains and forgotten assets that exist outside your known IP ranges. We give you a complete view of your footprint, not just the parts IT remembers to scan.
Secure your cloud from the inside out
Managing a hybrid environment requires more than just listing instances. Intruder connects directly to AWS, Azure, and Google Cloud to audit the configuration itself. It highlights misconfigurations, dangerous security groups, and exposed storage buckets that simple network scans often overlook, helping you catch drift before it becomes an incident.
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 often praised in reviews for being responsive and knowledgeable. Whether it's prioritizing a new threat or understanding a complex finding, we're here to help you get to an outcome.
Generate audit-ready reports, instantly
Eliminate the manual pain of audit preparation. Intruder generates instant, audit-ready reports for SOC 2, ISO 27001, and other frameworks. With direct integrations into platforms like Drata and Vanta, you can automate your evidence collection, saving your team countless hours.
Automate your remediation workflows
Intruder bridges the gap between security and development with clear, actionable remediation advice and seamless integrations with Slack, Jira, and Azure DevOps.
GregAI, Intruder’s AI security analyst, helps triage findings, draft remediation notes, and explain root causes to accelerate fixes and close the loop between discovery and action.
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.
