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.
Network Hotfix Scanner is a free advanced hotfix check utility that scans network computers for missing hotfixes and patches, and helps you download and install them. NetHotfixScanner gives you a quick look at the hotfixes and patches installed or missed on any remote computer...
United States
Mister Scanner tests for thousands of security loopholes and sends you weekly security reports generated after testing the site for more than a thousand security problems that hackers use today.
Stop breaches before they happen. RogueSight protects your Web Applications and APIs with continuous scanning, actionable insights and clear remediation guidance.
Estonia
EU
Vibe coding gets you from idea to live app in hours, but the security review is usually the first thing that gets skipped. Decloak is built to catch what shipping fast leaves behind.
United Kingdom
Attack Surface Monitor discovers and tracks what your organisation exposes to the internet, from a server you control. It ships as a single Go binary with SQLite - no database server, no agents, no telemetry.
Mageni provides a free, open-source and enterprise-ready cybersecurity vulnerability management solution.
United States
Shieldome is a web vulnerability scanner and continuous security monitoring platform - OWASP Top 10, PCI DSS, GDPR, and SOC 2 checks with white-label reports, built for developers and agencies.
Serbia
BoringSec is an application security platform for developers, founders, product teams, and agencies. It combines code review, live application scanning, evidence-backed findings, AI-ready remediation, re-testing, and continuous monitoring in one workflow.
EstoniaEU
ScanLabsAI is an AI-powered website vulnerability scanner built for agencies, MSPs and development teams responsible for security across many client sites.
Improve your authentication security for your linux servers with mutual TLS (mTLS). WoTT automatically rotates private keys with our public key infrastructure (PKI) and lets you seamlessly and easily manage certificates at scale.
United Kingdom
Continuous security platform providing external infrastructure, web app, and repository vulnerability scanning using open-source engines with SAST, network, and port assessments, findings grouped by severity, automated workflow integration, unlimited users, and fast setup.
United Arab Emirates
Scan all 65,535 TCP ports daily, not just the top 1,000. NoxScan uses eBPF, masscan, ZGrab2, Nuclei, and AI to discover your external attack surface, reduce false positives, map CVEs, and generate SOC 2/ISO 27001-ready reports. From €10/mo. 30-day free trial.
CyprusEU
