The 41 Best Security Auditing in 2026

velociraptor

Digital Forensics and Incident Response

Free

Best for: Experienced DFIR teams seeking automation and scalability.

unleashed-firmware

Stable custom firmware for Flipper Zero with advanced features

Free

Best for: Experienced hackers and makers

prowler

Automate cloud security and compliance

Free

Best for: Tech-savvy cloud security teams

osquery

Open-source SQL framework for querying and auditing Linux, Windows, and macOS endpoints.

Free

Best for: Security and DevOps teams that want SQL-based, open-source endpoint visibility they can build fleet tooling around.

Socket

Supply chain security platform that flags malicious and risky open-source dependencies.

Freemium

Best for: Engineering teams wanting automated, low-noise scanning for malicious or risky open-source dependencies in CI/CD.

Kali Linux 2023.3

The latest Kali Linux release with updated tools for penetration testing and security research.

Free

Best for: Penetration testers and security researchers needing latest open‑source toolset

Wazuh

Unified XDR and SIEM protection for endpoints and cloud workloads

Free

Best for: Large-scale enterprise security teams

Intruder

Cloud-based exposure management platform for continuous vulnerability scanning.

Contact for Pricing

Best for: Security teams that want continuous, automated vulnerability and cloud misconfiguration scanning in one dashboard.

SpiderFoot

Automate OSINT for threat intelligence and attack surface mapping

Free

Best for: Large organizations with in-house security teams

OWASP ZAP

Free, open-source web app security scanner stewarded by Checkmarx.

Free

Best for: Teams wanting a free, extensible DAST scanner that fits both manual pentesting and CI/CD automation.

shhgit

Secrets detection for GitHub, GitLab and Bitbucket repositories

Free

Best for: Small dev teams and open-source projects

Drata

Automate security compliance and reduce audit prep work

Paid (Subscription)

Best for: Mid-sized businesses with standard compliance needs

connaisseur

Kubernetes admission controller for container image signature verification

Free

Best for: Kubernetes admins seeking robust image security

Tenable Nessus

Vulnerability assessment scanner that finds, prioritizes, and helps remediate security weaknesses.

Paid (Subscription)

Best for: Security teams needing a trusted, actively updated vulnerability scanner with strong risk prioritization.

syft

Generate Software Bill of Materials from container images and filesystems

Free

Best for: DevOps and security teams needing free, comprehensive SBOMs for containers

Forcepoint DLP

Prevent data loss everywhere with precise classification and enforcement.

Best for: Large enterprises and regulated industries needing enterprise‑wide DLP

Vanta

Automated security compliance monitoring and evidence collection.

Paid (Subscription)

Best for: Mid‑size SaaS firms needing continuous SOC 2/ISO compliance

Sherlock

Find social media profiles by username

Free

Best for: Researchers and casual investigators

Burp Suite

Web application penetration testing toolkit from PortSwigger.

Freemium

Best for: Security professionals who need a proven manual and automated web app testing toolkit.

tpotce

The all-in-one multi honeypot platform for comprehensive network defense.

Free

Best for: Experienced security teams with dedicated resources

dirsearch

Discover hidden web server directories and resources

Free

Best for: Experienced security professionals and penetration testers

strix

Open-source AI penetration testing tool to find and fix vulnerabilities.

Free

Best for: Tech-savvy security teams and developers

Semgrep

Find security bugs fast with customizable pattern‑matching rules

Freemium

Best for: Teams needing fast, customizable static analysis across multiple languages

UpGuard

Cyber risk platform for vendor risk, attack surface, and third-party security monitoring

Contact for Pricing

Best for: Security teams that need continuous visibility into vendor risk and external attack surface.

x64dbg

Powerful open‑source debugger for Windows reverse engineering

Free

Best for: Seasoned Windows reverse engineers needing extensible debugging

Mobile-Security-Framework-MobSF

Automated mobile app security testing and analysis framework

Free

Best for: Experienced security professionals and developers

Wiz

Cloud security platform for multi-cloud infrastructure

Contact for Pricing

Best for: Cloud-native orgs with multi-cloud infrastructure

lynis

Security auditing and system hardening tool

Free

Best for: Experienced system administrators and security professionals

mitmproxy

Interactive, scriptable man‑in‑the‑middle proxy for HTTP, HTTPS and WebSocket traffic

Free

Best for: Security researchers needing deep, scriptable traffic manipulation

CyberChef

The web app for all your data manipulation and decoding needs

Free

Best for: Security analysts needing quick, shareable browser‑based data transforms

Snyk

Secure code by finding and fixing open-source, container and IaC vulnerabilities.

Freemium

Best for: Dev teams needing automated vulnerability fixes in CI pipelines

Metasploit

Widely used open-source penetration testing framework for finding and exploiting vulnerabilities.

Freemium

Best for: Security professionals who need a free, extensible exploit and pentesting framework.

Secureframe

Compliance automation for security certifications

Contact for Pricing

Best for: Mid-sized businesses seeking SOC 2 compliance

Greenbone (OpenVAS)

Vulnerability management platform behind the widely used OpenVAS scanning engine, from appliance to free edition.

Freemium

Best for: Teams wanting a free, open-source vulnerability scanner with an option to scale to an enterprise appliance.

ghidra

Software reverse engineering framework

Free

Best for: Advanced security researchers and developers

Detectify

Application security platform combining payload-based scanning with ethical hacker research.

Contact for Pricing

Best for: AppSec teams that want fast-moving vulnerability coverage backed by real ethical hacker research, not just static scans.

Veracode Application Security Platform

Secure your software faster with automated static and dynamic analysis.

Paid (Subscription)

Best for: Enterprises and large dev teams needing unified SAST/DAST/SCA

john

Advanced offline password cracker supporting hundreds of hash types

Free

Best for: Security auditors needing high‑performance, customizable offline hash cracking

crowdsec

Open-source, crowdsourced security engine that blocks malicious IPs in real time

Freemium

Best for: Sysadmins/DevOps needing free, community‑driven IP blocking