The Censys Alternative for Complete Attack Surface Protection
Finding an asset is not the same as knowing if it's vulnerable. While Censys 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.
From raw data to real security
If you need to query the entire internet to research global trends or find assets belonging to other organizations, Censys is hard to beat. But if your goal is continuous threat exposure management (CTEM) for your own environment, you need more than a map - you need evidence of what’s exploitable, what matters most, and what to fix next.
Intruder pairs automated attack surface discovery with deep scanning, cloud posture checks, and authenticated testing so you can go from detection to verified closure faster, without stitching together multiple tools.
Proactive attack surface monitoring
Intruder delivers more than just perimeter discovery. Always-on attack surface monitoring detects new services and cloud assets to help you stay ahead of any new risks introduced in the latest dev release.
See more than what’s on the perimeter
Censys maps external assets. 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.
Get context, not just coordinates
Where Censys stops at exposure, Intruder continues to exploitability. We differentiate between a harmless open port and a critical vulnerability, giving you meaningful priorities instead of raw asset data that leaves the analysis up to you.
Trusted by 3,000+ companies worldwide
Uncover Shadow IT before attackers do
New releases often introduce Shadow IT that slips past security teams. While Censys maps the global internet, Intruder stays focused on your perimeter. By combining direct cloud syncing with certificate transparency and passive DNS, Intruder automatically detects newly exposed subdomains, APIs, and related domains, then brings them into your monitoring and scanning.
The Censys competitor built for rapid response
When a critical vulnerability hits the news, you can’t wait for a scheduled scan. Intruder automatically checks your systems for new threats the moment a check is available, alerting you to high-impact risks days before other scanners catch up.
Discover, prioritize, and verify
Stop juggling separate tools for discovery and scanning. Intruder unifies asset discovery with smart prioritization to focus your attention on critical risks. When your team applies a fix, we automatically re-scan to verify it - giving you confidence that your attack surface is truly secure.
Turn raw data into ready-to-work tickets
Stop manually interpreting asset data. Intruder bridges the gap between security and development, providing clear, actionable remediation advice and integrating seamlessly with Slack, Jira, and Azure DevOps to deliver ready-to-work tickets. The AI assistant, GregAI, even helps triage findings and draft remediation notes to accelerate the process.
Prove compliance without the panic
Streamline your entire audit process and eliminate manual evidence gathering. Intruder provides instant, audit-ready reports for SOC 2 or ISO 27001. For ultimate efficiency, connect directly with your compliance platform and automatically send vulnerability evidence to services like Drata and Vanta, saving your team countless hours.
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.
