One of the most popular alternatives to Nessus is SiteOne Crawler, which is free and open source. Other popular alternatives are Metasploit, PhoneSploit Pro, OpenVAS and ScanAnchor. You're spoiled for choice with Vulnerability Scanners like Nessus: we list more than 50 alternatives for the web, Linux, Windows, Mac and self-hosting.
A free in-depth website analyzer providing audits of security, performance, SEO, accessibility and other technical aspects. Available as a desktop application for Windows/macOS/Linux and as a CLI tool for advanced users and CI/CD processes. It also includes an offline web page exporter.
Czechia
EU
Metasploit Community Edition simplifies network discovery and vulnerability verification for specific exploits, increasing the effectiveness of vulnerability scanners such as Nexpose - for free. This helps prioritize remediation and eliminate false positives, providing true...
United States
An all-in-one hacking tool to remotely exploit Android devices using ADB and Metasploit-Framework to get a Meterpreter session.
India
The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools offering a comprehensive and powerful vulnerability scanning and vulnerability management solution.
Unlimited vulnerability scanning with flat-rate pricing. Built-in CISA KEV and EPSS threat intelligence, compliance reporting for PCI-DSS, Cyber Essentials, and ISO 27001. No per-IP fees.
Whatoblock is a real-time cybersecurity threat intelligence platform with global botnet tracking, scanner detection, interactive threat search, and a live threat map.
United Kingdom
A web security portfolio offering a combination of on-premise installed security software in conjunction with a cloud hosted web application firewall and CDN.
United States
CVEFinder is a freemium web-based security tool that scans websites to detect technologies and identify known CVE vulnerabilities affecting them. Allows to see public exploits for the CVEs, monitor websites weekly, export affected CVEs and more.
A cybersecurity service that provides hybrid penetration testing by combining AI automation with manual human expertise. Their core promise is "Zero False Positives," aiming to offer validated security intelligence rather than just automated scan results.
GermanyEU
Free, open-source network vulnerability scanner & penetration testing tool - Alternative to Nessus, OpenVAS, Nexpose.
Nuclei is used to send requests across targets based on a template, leading to zero false positives and providing fast scanning on a large number of hosts. Nuclei offers scanning for a variety of protocols, including TCP, DNS, HTTP, SSL, File, Whois, Websocket, Headless etc.
United States
Test your website like a real attacker would. Nautillo Pro finds account takeover risks, API exposure, broken access control, and AI security flaws before users and hackers do.
EstoniaEU
