What Is Intruder? The Security Scanner Explained for Founders
Intruder is a cloud-based vulnerability scanner aimed at small and medium-sized businesses. It runs automated checks against your external attack surface — the domains, IPs, and web applications your organization exposes to the internet. It is not a penetration testing firm; it does not employ a human who manually attacks your app. It is a managed scanning service that checks your live infrastructure on a recurring schedule and alerts you when new vulnerabilities appear.
What does Intruder scan?
Intruder scans your external attack surface: exposed ports, web application endpoints, known CVEs in the services you run, and misconfigured cloud storage. It is primarily aimed at infrastructure security — the network layer — rather than application-layer security in the detail that a dedicated web application scanner provides.
The core product runs recurring scans on a schedule. When a new CVE is published that affects services in your stack, Intruder can trigger an emerging threat scan automatically. This is the main value proposition over running a one-time scan manually: continuous coverage as the threat landscape changes.
How much does Intruder cost?
Intruder’s Essential plan starts at approximately $113 per month for one target. Pricing scales with the number of targets (domains or IPs) you add. There is a free trial but no permanent free tier. For a solo founder with one app, the entry cost is around $1,350 per year at the Essential tier.
What does Intruder not do?
Intruder does not cover application-layer reliability, performance, or monitoring. It does not check whether your app has error tracking, whether your database queries are slow, or whether your Supabase row-level security is enabled. It does not detect which AI tool built your application or apply platform-specific security rules. It scans the infrastructure surface, not the four-dimension picture a launch readiness audit covers.
Intruder vs Launch Ready Code: which one?
| Capability | Intruder | Launch Ready Code |
|---|---|---|
| External vulnerability scanning | Yes — recurring, scheduled | Yes — on demand + subscription tiers |
| AI-platform-aware scanning | No | Yes — 11 platforms detected |
| Reliability + monitoring coverage | No | Yes — all 4 dimensions |
| Price to start | ~$113/mo (Essential) | $0 free scan, $499 full audit |
| First result speed | Minutes (scheduled scan) | 30–90 seconds |
| Best for | SMBs with multi-target infrastructure | AI-built apps, pre-launch founders |
The practical guidance: if you have multiple domains and servers and want continuous, automated infrastructure scanning at a reasonable SMB price, Intruder is a credible option. If you built your app with Lovable, Bolt, or Cursor and need to know whether it is safe to launch today, the free LRC scan costs $0 and takes 30 seconds.
See what your app exposes — free
Platform-aware scan across security, reliability, performance, and monitoring. Results in 30 seconds. No code access needed.
Run the free scan — $0Frequently asked questions
What is Intruder used for?
Intruder is used for recurring automated vulnerability scanning of external attack surfaces — exposed ports, web endpoints, and known CVEs in the services your infrastructure runs.
Is Intruder a penetration testing tool?
No. Intruder is an automated scanner, not a penetration testing firm. It does not employ a security engineer to manually attack your application or chain vulnerabilities into an attack narrative.
What is the best Intruder alternative for AI-built apps?
Launch Ready Code is the alternative designed specifically for AI-built apps. It detects which platform generated your code (Lovable, Bolt, Cursor, etc.) and applies platform-specific security rules, plus covers reliability and monitoring gaps that infrastructure scanners like Intruder do not address.
Does Intruder scan web application vulnerabilities?
Yes, Intruder covers web application checks including authentication issues and common CVEs. It is stronger on infrastructure scanning (ports, services) than on AI-platform-specific application gaps.
Research sources
- OWASP Foundation — OWASP Top 10 Web Application Security Risks
- MITRE Corporation — CWE Top 25 Most Dangerous Software Weaknesses
- NIST National Vulnerability Database — NVD CVE severity ratings
- Jai Mittal, Founder & CTO, Launch Ready Code — Proprietary data from 700+ AI-built app security audits, 2025–2026. Average Launch Readiness Score: 44/100.