The top-rated Horizon3 alternative
See what's exposed, validate what's exploitable, and focus on what actually matters. Intruder combines AI pentesting, attack surface monitoring, vulnerability management, and cloud security into a single exposure management platform.
More than pentesting. Validation that never stops.
Annual pentests have long been unfit for purpose. Intruder monitors continuously across your attack surface, cloud environments, and applications. AI pentesting agents investigate findings on demand, saving your team hours of manual triage.
NodeZero proves attack paths through point-in-time runs. Intruder gives you that validation continuously, as part of a complete exposure management platform.
Know what's exposed, fast
Intruder knows within minutes whether a new target is exposed, and picks up new cloud assets, CVEs, and configuration changes automatically, no manual scheduling required.
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Catch what others miss
Unparalleled insight, with 170,000+ infrastructure, attack surface, and application checks in a single platform.
Chase real threats, not noise
Intruder shows you which exposures attackers are actually exploiting, so your team focuses on real risk, not theoretical bugs.
Trusted by thousands of companies worldwide
The depth of a pentest, whenever you need it
AI pentesting agents deliver full-scale web app pentests when you need them, plus the investigative depth of a pentester on demand to speed up triage and investigation.
Find the assets you didn't know you had
NodeZero discovers your external assets when you trigger a discovery run. Intruder does it continuously. With daily subdomain discovery, Passive DNS enrichment, and cloud sync, it surfaces the Shadow IT and forgotten assets your team didn't know existed.
Catch risky cloud misconfigurations
Cloud breaches usually start with simple misconfigurations, like an open storage bucket or an over-permissive IAM role, rather than complex exploits. Intruder runs daily configuration checks across AWS, Azure, and Google Cloud, scans container images, and ties cloud findings back to internet-facing risk so your team can prioritize the fixes that actually reduce exposure.
Know what's affected the moment a CVE hits the news
When major vulnerabilities like MOVEit or Citrix Bleed break, Intruder automatically scans your external assets as soon as a new check is available. Unlike NodeZero's Rapid Response add-on, coverage spans any Medium, High, or Critical CVE, and is included in your plan.
Spend less time analyzing and more time remediating
A prioritized list of risks is only useful if your developers can act on it immediately. Intruder syncs findings straight into Jira, Azure DevOps, and GitHub, with clear owners and severity context. GregAI drafts remediation guidance within the platform, so your team can move from triage to fix without context-switching.
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NodeZero is an autonomous penetration testing platform developed by Horizon3.ai. Intruder is a continuous exposure management platform that combines AI pentesting, attack surface management, cloud security, and vulnerability management in one product. They take different approaches: NodeZero proves exploitability through scheduled pentests, while Intruder finds and prioritizes exposure continuously across your full attack surface.
Intruder complements penetration testing. AI pentesting agents investigate findings the way an experienced pentester would, validating exploitability in minutes rather than days. This gives you the depth of a pentest more continuously and at a fraction of the cost, on every new release, cloud service, subdomain, or opened port. Manual penetration testing still has a role for deep, expert-led assessments. Speak to our team about how the two fit together.
Intruder uses transparent SaaS pricing with multiple plan tiers and a 14-day free trial. NodeZero pricing is quote-based and typically scales by the number of active IP addresses tested. See current Intruder pricing.
Intruder integrates with Jira, GitHub, GitLab, Azure DevOps, and ServiceNow for issue tracking, Slack and Microsoft Teams for notifications, Drata and Vanta for compliance, Zapier for workflow automation, and Okta for SSO, plus native cloud sync with AWS, Azure, and Google Cloud. See the full list of integrations.
Intruder's Cloud, Pro, and Enterprise plans include emerging threat detection (Emerging Threat Scans, with manual Rapid Response added on Enterprise), reporting dashboards, cyber hygiene scoring, and audit-ready reports for SOC 2, ISO 27001, HIPAA, and DORA. NodeZero offers similar capabilities through Premium Add-ons such as Rapid Response and NodeZero Insights.
