Top Alternatives to Acunetix

Nessus Professional is a widely-used vulnerability scanner by Tenable, designed to identify security vulnerabilities in a variety of systems nationwide. It helps organizations manage their security posture by providing comprehensive scans, detailed reporting, and integration with other tools for remediation.

Skipfish is a discontinued command-line web application security scanner known for its recursive crawling and heuristic detection capabilities. It's designed to quickly assess web applications for common vulnerabilities and security flaws.

Nikto is a powerful and widely-used open-source web server scanner designed to identify potential security vulnerabilities and misconfigurations. It performs comprehensive tests against web servers to detect dangerous files, outdated server versions, and version-specific problems.

Zed Attack Proxy (ZAP) is a free and open-source web application security scanner. It helps developers and penetration testers find security vulnerabilities in web applications during the development and testing phases.