Free Nessus Alternatives

The best free alternative to Nessus is Metasploit. It's not free, so if you're looking for a free alternative, you could try OpenVAS or HostedScan Security. If that doesn't suit you, our users have ranked more than 25 alternatives to Nessus and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Nessus are Probely, Tsunami, OpenSCAP and skipfish.

Nessus alternatives are mainly Vulnerability Scanners but may also be Penetration Testing Tools or Cloud Computing Services. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Nessus.

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Nessus

Paid • Proprietary
Vulnerability Scanner

Mac
Windows
Linux
Android
iPhone

The Nessus vulnerability scanner is the world-leader in active scanners, featuring high-speed discovery, configuration...

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Metasploit
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Free Personal • Open Source
Penetration Testing Tool
Vulnerability Scanner
Windows
Linux
BSD
19 alternatives to Metasploit
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...
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Metasploit Features
Security Testing
Metasploit vs Nessus opinions
Most users think Metasploit is a great alternative to Nessus.
OpenVAS
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No
Free • Open Source
Vulnerability Scanner
Linux
23 alternatives to OpenVAS
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.
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OpenVAS Features
Vulnerability management
OpenVAS vs Nessus opinions
Most users think OpenVAS is a great alternative to Nessus.
HostedScan Security
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No
Freemium • Proprietary
Online
Software as a Service (SaaS)
10 alternatives to HostedScan Security
HostedScan provides 24x7 alerts and detection for security vulnerabilities. Industry-standard, open-source, vulnerability scans. Automated alerts when something changes. Manage target list manually or import automatically from providers, such as AWS, DigitalOcean, and Linode...
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HostedScan Security Features
Security Testing
Probely
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Yes
No
Freemium • Proprietary
Vulnerability Scanner
Penetration Testing Tool
Online
28 alternatives to Probely
Probely is a top-tier cloud-based DAST Scanner designed for DevOps, empowering Security and Development teams to work together to secure their web applications and APIs.
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Probely Features
1. Multiple Account supportProbely support multiple accounts without the need to logout and login
REST API
API Integration
Jira integration
Slack integration
API Scan
SQL Injection Protection
Free API
Tsunami
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No
Free • Open Source
Vulnerability Scanner
Self-Hosted
17 alternatives to Tsunami
Tsunami is a general purpose network security scanner with an extensible plugin system for detecting high severity vulnerabilities with high confidence.
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Tsunami Features
1. Extensible by Plugins/ExtensionsTsunami can be extended with add-ons, plugins and extensions.
Vulnerability Assessment
OpenSCAP
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Yes
No
Free • Open Source
Vulnerability Scanner
Linux
13 alternatives to OpenSCAP
SCAP is a line of standards managed by NIST. It was created to provide a standardized approach to maintaining the security of enterprise systems, such as automatically verifying the presence of patches, checking system security configuration settings, and examining systems for...

OpenSCAP has no features, suggest some!
skipfish
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No
Free • Open Source
Vulnerability Scanner
Mac
Windows
Linux
BSD
29 alternatives to skipfish
A fully automated, active web application security reconnaissance tool. Key features: High speed: pure C code, highly optimized HTTP handling, minimal CPU footprint - easily achieving 2000 requests per second with responsive targets.
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skipfish Features
1. Command line interfaceskipfish either have CLI support or is a CLI-only app.
Heuristic Detection
Discontinued
Skipfish is no longer maintained. Last version, 2.10 beta, released in December 2012, can be still downloaded from Google Code Archive
Pentest-Tools.com
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Yes
No
Freemium • Proprietary
Vulnerability Scanner
Penetration Testing Tool
Online
Software as a Service (SaaS)
18 alternatives to Pentest-Tools.com
We facilitate quick discovery and reporting of vulnerabilities in websites and network infrastructures, providing a set of powerful and tightly integrated pentesting tools that enable you to perform easier, faster, and more effective pentests.
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Pentest-Tools.com Features
1. Two-factor AuthenticationPentest-Tools.com supports two-factor authentication (2FA).
Reporting
Vulnerability management
Server Monitoring
Security Audit Report
Security Testing
Vulnerability Assessment
Vulners API
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No
Freemium • Proprietary
Vulnerability Scanner
Linux
Online
Software as a Service (SaaS)
15 alternatives to Vulners API
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.
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Vulners API Features
Vulnerability Assessment
Vulnerability management
Hackerize
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Yes
No
Freemium • Proprietary
Software as a Service (SaaS)
Online
43 alternatives to Hackerize
Hackerize is a security monitoring platform offering business owners a service that's been specifically designed to protect websites from emerging online threats. Over 30,000 websites are compromised every day and websites that have been blacklisted due to a hack can...
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Hackerize Features
Security monitoring
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