Sites and apps similar to Intruder include Shodan, which has a free version. Other options are Burp Suite, OpenVAS, Zed Attack Proxy (ZAP) and Nessus. Vulnerability Scanners like Intruder are a crowded field, with more than 50 alternatives for Windows, Linux, Mac, self-hosting and Android.
Barrion helps developers and tech teams secure their web applications by automating security checks. It scans websites and web apps for common vulnerabilities, evaluates SSL/TLS and email security (SPF, DKIM, DMARC), and checks security headers and outdated software.
Sweden
EU
Tresal is a European cybersecurity platform that helps organizations identify and monitor their external attack surface. It scans internet-facing assets and cloud environments, providing real-time alerts, risk insights, and simple remediation tools.
NetherlandsEU
TEQNIX is a platform with a number of tools and strategies for penetration testers, red teamers and secops. It promotes automation with scanners and utilities and also assist in a real-time attack situation.
Guardius is a Software as a Service (SaaS) company designed to streamline and automate various IT needs for companies that operate their own websites or manage their own infrastructure. It is crucial for companies to safeguard their websites and infrastructure against potential...
Check realtime and continuously for outdated web software on your server. Delivered by mail and an easy to use dashboard and get notified if PHP, Apache, cPanel, Wordpress, Drupal and many more become outdated.
BelgiumEU
Tinfoil Security provides a simple website application security solution by routinely monitoring and checking for vulnerabilities using a constantly updated scanner.
United States
SmartScanner is an AI-powered web vulnerability scanner for testing security of web sites and applications.
Astra’s Pentest is a comprehensive penetration testing solution with an intelligent automated vulnerability scanner coupled with in-depth manual pentesting.
India
Golem Security Scanner is a powerful and intuitive website security scanner which uses a combination of proprietary and open source scanners to maximize the scan findings. Much less expensive for the paid version than other providers, with a free option which scans a portion of...
Vulners is a high-quality correlated database of software vulnerabilities. Users can create a custom VM solution using our consolidated database through API, multiple vulnerability scanners, plugins, and many other security tools and integrations.
United States
Free 60-second website security audit with a shareable letter grade — checks SSL/TLS, DNS & email authentication (SPF/DKIM/DMARC), security headers, dark-web exposure and performance.
Find your vulnerabilities before others do. Schedule vulnerability scans for your servers and get notified when it's time to call your admin.
