Tenable is the cybersecurity company behind Nessus, a well-known scanner that checks networks and systems for known vulnerabilities. The free Nessus Essentials edition offers real scanning, which makes it a fit for anyone learning cybersecurity or running a small network who wants to find gaps before someone else does.
Key features
- Vulnerability scanning: Networks and systems checked for known vulnerabilities.
- Free Nessus Essentials: Basic scanning for up to 16 IP addresses.
- Prioritized findings: Fix the highest-risk issues first.
- Vulnerability Management platform: For larger environments.
Pricing
| Plan | Price | What you get |
|---|---|---|
| Nessus Essentials | Free | Up to 16 IP addresses |
| Nessus Professional | About $366/month per license | Professional scanning |
| Nessus Expert | About $533/month per license | Additional features |
| Vulnerability Management | About $292/month (about 65-asset minimum) | Per-asset pricing |
Prices can change, so check Tenable’s official pricing page before you subscribe.
Pros and cons
| Pros | Cons |
|---|---|
| Free edition with real scanning capability | Paid tiers are priced for real security budgets |
| Prioritized findings help small teams focus | License and per-asset pricing is hard to compare |
| A recognized tool worth learning in cybersecurity | Scan only systems you are authorized to scan |
Use cases
- Learning vulnerability scanning in a home lab: Run Nessus Essentials on your own test machines and servers and learn to read the results.
- Scanning a small office network: Find unpatched devices and exposed services.
- Prioritizing fixes: Start with the highest-risk vulnerabilities instead of fixing everything at once.
Who it’s best for
Cybersecurity learners, small network admins and technical teams with a security budget.
Skip the paid tiers if you are an individual without a security budget, and start with the free Essentials edition.
How to get started
Register for Nessus Essentials and scan only devices you own or have explicit permission to scan.
FAQ
Is there a free edition? Yes, Nessus Essentials for up to 16 IP addresses.
Can I scan any network? No. Scan only systems you own or are authorized to scan.
How are paid plans priced? Per license for Nessus, and per asset for the Vulnerability Management platform.
Disclosure: al-khwarizmi may earn a commission if you sign up for Tenable through links in this article. This does not change the price you pay, and it does not influence which tools we cover.
