Shodan Alternatives

Nikto is an Open Source (GPL) web server scanner which performs comprehensive tests against web...

Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.

Audit your website security and web applications for SQL injection, Cross site scripting and other...

w3af is a Web Application Attack and Audit Framework

Network mapping service

A fully automated, active web application security reconnaissance tool.

The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding...

Censys helps organizations, individuals, and researchers find and monitor every server on the Internet to reduce exposure and improve security.

The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools...

Burp Suite is an integrated platform for performing security testing of web applications.

PunkSPIDER is a global-reaching web application vulnerability search engine.

Find security issues, verify vulnerability mitigations & manage security assessments with Metasploit. Get the world's best penetration testing software now. DownloadPen testing software to act like an attacker.

Subgraph Vega | Free and Open Source Web Application Vulnerability and Security Scanner