lynis vs Tenable Nessus
Side-by-side comparison of features, pricing, ratings, and alternatives.
Lynis is a security auditing tool for Linux, macOS, and UNIX-based systems. It assists with compliance testing (HIPAA/ISO27001/PCI DSS) and system hardening. Lynis is agentless and installation is optional. It provides a comprehensive security scan and suggests remediation steps to improve system security.
Nessus is Tenable's vulnerability assessment scanner, used to discover vulnerabilities and misconfigurations across operating systems, network devices, and applications. It covers over 117,000 CVEs through more than 319,000 detection plugins, with roughly 100 new plugins released weekly, and prioritizes findings using CVSS v4, EPSS, and Tenable's own VPR risk scoring. The product ships with 450+ pre-built policy and compliance audit templates and guided remediation workflows to help teams act on results rather than just collect them. Nessus Professional and Nessus Expert are sold as annual subscriptions, with Expert adding external attack surface scanning and expanded web application scanning.
- Comprehensive security scanning and auditing capabilities
- Assists with compliance testing for major regulatory requirements
- Agentless and optional installation for flexibility
- Customizable security scans and audits
- Industry-standard, widely trusted scanner
- Extensive and frequently updated CVE/plugin coverage
- Multiple risk-scoring models for prioritization
- Flexible deployment including low-cost hardware
- Steep learning curve for users without security expertise
- Limited support for non-UNIX based systems
- Requires manual remediation of identified vulnerabilities
- Annual pricing is a significant investment for small teams
- Web app scanning is limited by FQDN count on base tier
- Requires security expertise to interpret and act on results effectively
More alternatives & similar tools
Alternatives to lynis
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Alternatives to Tenable Nessus
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Vulnerability management platform behind the widely used OpenVAS scanning engine, from appliance to free edition.
The Verdict
AI-generated from listing dataLynis is a free, open‑source, self‑hosted scanner focused on Unix‑like systems with a steep learning curve, while Tenable Nessus is a paid, commercial scanner with broader OS coverage, extensive CVE plugins, and richer support but higher cost.
Key differences
- •Lynis is free and open‑source; Nessus requires a paid subscription.
- •Lynis targets Unix/Linux/macOS only; Nessus scans Windows, Linux, network devices, and web apps.
- •Nessus provides 117k+ CVE coverage and risk scoring models; Lynis offers compliance checks but limited CVE depth.
- •Nessus includes guided remediation workflows and optional advanced support; Lynis relies on manual remediation and community support.
- •Deployment models differ: Lynis is self‑hosted, agentless shell script; Nessus is a desktop app with broader hardware options.
Pricing & value
Lynis is free and open source, giving zero licensing cost; Nessus requires a subscription, increasing expense.
Ease of use / learning curve
Nessus offers guided remediation and documentation; Lynis has a steep learning curve for non‑experts.
Features & depth
Nessus covers 117k+ CVEs with 319k plugins and multiple risk scores; Lynis provides compliance checks but limited vulnerability breadth.
Integrations & ecosystem
Nessus offers an API, extensive plugins, and policy templates; Lynis has an API but fewer ecosystem integrations.
Collaboration
Nessus includes advanced support add‑ons and training; Lynis only offers community docs and GitHub issues.
Scalability
Nessus runs on varied hardware including Raspberry Pi and supports large enterprise deployments; Lynis is self‑hosted shell script, less scalable.
Support
Nessus provides paid advanced support and training; Lynis relies on contact form, docs, and GitHub issues only.
Choose lynis if…
Small teams or individuals needing a free Unix‑only audit tool and comfortable with manual remediation.
Choose Tenable Nessus if…
Organizations that require comprehensive, cross‑platform vulnerability coverage, risk prioritization, and paid support.
Common questions
Is there any cost to start using these tools?
Lynis is free and open source; Tenable Nessus requires a paid subscription.
Can I use these scanners on Windows systems?
Lynis supports only Unix‑like systems; Nessus scans Windows, Linux, network devices, and web applications.
What kind of support is available if I run into issues?
Lynis offers community support via GitHub issues and documentation; Nessus offers paid advanced support, documentation, and training.