VPNSpotter
Free · 2026

🔎 Free Security Auditing Tools 2026

6 security auditing tools you can use for free — no credit card required. Includes fully free tools and freemium tiers with generous limits.

  1. 1
    N

    Nmap

    Free

    Network discovery and security auditing tool.

    4.8 (79)

    Network discovery and security auditing tool.

    View Nmap→
  2. 2
    B

    Burp Suite

    From €0/mo

    Web application security testing platform.

    4.6 (259)

    Web application security testing platform.

    View Burp Suite→
  3. 3
    N

    Nessus

    From €0/mo

    Industry-standard vulnerability scanner.

    4.5 (396)

    Industry-standard vulnerability scanner.

    View Nessus→
  4. 4
    M

    Metasploit

    From €0/mo

    Penetration testing framework.

    4.5 (300)

    Penetration testing framework.

    View Metasploit→
  5. 5
    G

    Grimoire (Snyk)

    From €0/mo

    Developer-first security scanning for code, dependencies, and containers.

    4.4 (424)

    Developer-first security scanning for code, dependencies, and containers.

    View Grimoire (Snyk)→
  6. 6
    O

    OpenVAS

    Free

    Full-featured open-source vulnerability scanner.

    4.3 (236)

    Full-featured open-source vulnerability scanner.

    View OpenVAS→

What counts as free?

Every tool on this page has either a fully free plan or a freemium tier that doesn't require a paid subscription to start. We list features, limits, and upgrade paths on each tool's detail page so you know exactly what the free plan includes.

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