Tenable scans your network and systems for known security vulnerabilities, giving a company or IT team a prioritized list of what to fix before it becomes a breach. Its free tier, Nessus Essentials, makes basic scanning accessible even without a security budget.
Key features
- Network and system scanning: for known vulnerabilities.
- Free Nessus Essentials: basic scanning for up to 16 IP addresses.
- Prioritized findings: fix the highest-risk issues first.
- Tenable Vulnerability Management: for larger environments.
Pricing
| Plan | Price | Includes |
|---|---|---|
| Nessus Essentials | Free | Up to 16 IP addresses |
| Nessus Professional | about $366/month per license | Professional scanning |
| Nessus Expert | about $533/month per license | Extra features |
| Vulnerability Management | about $292/month, about 65-asset minimum | Priced per asset |
Enterprise products are quoted, and pricing in this market shifts often, so confirm directly with Tenable.
Prices change over time. Figures above are based on Tenable’s own site.
Pros and cons
| Pros | Cons |
|---|---|
| Free tier offers real scanning, not a demo | Paid tiers suit companies with a security budget |
| Prioritized findings focus small teams | License and per-asset pricing is hard to compare |
Who it’s best for
Growing companies holding sensitive data, such as fintechs or platforms storing user information, that need to find gaps before they are exploited.
Skip it if you are early-stage with no sensitive data and a simple site. Basic hosting security practices are enough to start.
How to get started
Install the free Nessus Essentials, scan your key systems, fix the highest-risk findings first, then assess whether you need a paid tier.
FAQ
Is Nessus Essentials really free? Yes, for basic scanning of up to 16 IP addresses.
Do I need security expertise to use it? Scanning is fairly simple, but understanding and fixing the findings needs technical knowledge.
Disclosure: atlaspreneur may earn a commission if you sign up for Tenable through the links in this article. This does not change what you pay, and it does not influence which tools we choose to cover.
