Continuous external attack surface monitoring for modern security teams. ASM Scan continuously discovers your external attack surface using a passive-first approach, then validates findings with targeted active checks where needed. It correlates domains, subdomains, DNS, certificates, technologies, endpoints, leaked secrets, historical assets, and security misconfigurations into one evidence-backed report. Built for security teams that want actionable findings—not noisy asset lists.

Hi Product Hunt! 👋 I'm the maker of ASM Scan. After years in application security and penetration testing, I kept seeing the same issue: most organizations don't have a complete view of what they're exposing on the internet. Startups and small teams, especially those moving fast with AI-assisted or "vibe" coding, often deploy services, leak secrets, expose ports, or run vulnerable software without realizing it. Enterprise ASM platforms exist, but they're often expensive and out of reach for smaller teams. That's why we built ASM Scan. Our approach is **99% passive and 1% targeted active validation**. We first collect public intelligence—DNS, certificate transparency, historical archives, JavaScript, technologies, repositories, and other internet signals—then perform minimal validation to reduce false positives and confirm what's actually exposed. Instead of overwhelming you with noisy data, ASM Scan correlates everything into evidence-backed findings, including exposed assets, outdated technologies, leaked secrets, misconfigurations, takeover risks, and vulnerable software versions. **To help people get started, your first complete external attack surface scan and report are 100% free.** No credit card required. I'd love your feedback: * What findings would be most valuable to you? * What integrations would you like to see? * What would make ASM Scan part of your security workflow? Thanks for checking out ASM Scan—we're excited to hear what you think! 🚀

The passive-first approach sounds solid for staying under the radar. One thing that would help our team a lot is adding a simple diff view between scans, so we can quickly see what new assets or exposures popped up since the last run and prioritize those first instead of digging through the full report.

ASM Scan: Attack Surface Monitoring

Know what the internet knows about you

Know what the internet knows about you