Nessus Pricing 2026: Professional vs Expert Annual Cost

Nessus Professional costs $4,790 for one year and Nessus Expert costs $6,790, both read on Tenable's own pricing pages on 17 October 2026. Multi-year terms shave a few hundred dollars off each, 24/7 support is a $400 add-on, and the free Nessus Essentials edition stops at 5 IP addresses and non-commercial use. The $2,000 gap between the two paid editions buys web application scanning and external attack surface scanning, so pay it only if those two jobs are on your plan.

That is the whole price list, and it is unusually short for a security product. Nessus is sold as a flat license with unlimited assessments, not per asset, so the question is not how many hosts you scan but which edition, how many years, and whether anyone will need a phone line at 3 a.m. Tenable marks its Nessus prices VAT inclusive, so confirm the tax treatment on the quote if you buy outside a sales-tax jurisdiction.

Toolradar data: Toolradar, the software directory we run, tracks 19 vulnerability scanning tools as of 17 October 2026, and Nessus ranks fifth in that set with a 4.6 out of 5 user rating across 402 reviews. On entry price it ranks ninth of the 10 tools with a verified figure, at $249.17 a month billed yearly against a peer median of $17.79, which is the cost of a scanner that charges per license rather than per asset.

Nessus prices at a glance

Prices are from the Nessus Professional, Nessus Expert and Nessus Essentials pages and Tenable's buy page. A vulnerability scanner, for this reader, is the tool that finds the missing patch, the weak cipher and the open admin port before an attacker does. Nessus is the one most consultants and auditors learned on, which is why its price gets asked about so often.

Nessus Professional: one flat price a year

Professional is the commercial edition and the one most teams mean when they say Nessus. Tenable lists unlimited IT vulnerability assessments, CVSS v4 and EPSS scoring, configuration and compliance audits with templates for cloud infrastructure, internal PCI networks, SCAP and OVAL, configurable PDF, HTML and CSV reports, data export, Live Results, offline mode and community support. The page states no IP cap and no per-asset unit, so a consultant who scans five clients a month pays the same as an internal team scanning one network. That flat rate is the reason Nessus wins on price above a few hundred hosts and loses below a few dozen.

The multi-year terms are modest discounts, not bargains. Two years cost $9,331, which Tenable prints as a $249 saving against two annual renewals, and three years cost $13,638, a $732 saving, or $4,546 a year. Buy the three-year term only when the scanner is certain to stay in the budget that long, because the saving is smaller than one month of a junior analyst's salary and the license does not refund.

What Professional lacks is anything central. There is no multi-user console, no dashboard across scanners and no asset tracking over time; it is one scanner producing one report per run. A team that needs trending, ownership and ticket integration has outgrown it, and that is the cloud product Tenable prices per asset, covered below. Our Tenable review covers the whole portfolio.

Nessus Expert: $2,000 more for two extra jobs

Expert lists at $6,790 a year, $13,208 for two years (a $372 saving) and $19,304 for three (a $1,066 saving). On the Expert page Tenable names two additions over Professional: web application scanning that identifies vulnerabilities in custom application code, and external attack surface scanning described as 5 domains per quarter, so you find internet-facing assets before someone else does. Everything else on the Expert feature list is also on Professional.

The buying rule is a short one. If you already own a web application scanner or an attack surface tool, Expert is paying twice. If you own neither and your scope includes a customer-facing web app, the $2,000 difference is less than a single external pentest of that app. Compare the dedicated products on our attack surface management and web application firewall pages before you decide, since a dedicated tool usually covers more domains than five a quarter.

Existing Professional customers can upgrade to Expert free for 7 days, which is the cheapest way to answer the question: run the web app scan on your own application and see whether the findings justify the gap. Professional itself has a free trial on Tenable's page with no stated length.

Add-ons: support, training and what they change

Advanced Support adds phone, chat and community case support 24 hours a day, 365 days a year, for up to 10 named contacts. Without it, Professional and Expert ship with community support only. A consultancy that runs scans during client maintenance windows at night should treat this as part of the license, not an option, because a scanner that hangs at 2 a.m. with no one to call is a missed window and a billable day lost.

Training is sold separately: the Nessus Fundamentals on-demand course is $275 for one year of access for one person, and the Fundamentals plus Advanced bundle is $385. Neither is needed by someone who has run Nessus before, and both are cheaper than a day of a senior engineer's time teaching a new hire the scan policy screen.

What a team pays: three scenarios

These totals are our multiplication of Tenable's list prices read on 17 October 2026, before tax and before any reseller discount.

The first row is the honest Nessus price for most readers: the one-year Professional rate, renewed yearly, with the three-year saving if they commit. The third row is the ceiling before you leave Nessus for the cloud platform. Each row is one license. Tenable's page does not state the licensing unit, so ask in writing whether a second scanner in a second data center needs a second license before you count hosts.

Nessus Essentials and Essentials Plus: free, but not for work

Nessus Essentials is free on a 30-day license for up to 5 IPs, with a 30-day delay on plugin updates, no reporting, no data export, no compliance checks and no technical support. Tenable's page says it is strictly for non-commercial use and not engineered for production environments, and that scan data is not retained after the license expires. It answers "can I try Nessus on my home lab," and nothing else.

Essentials Plus is new: $199 a year for up to 20 IPs, real-time plugin updates, basic PDF and HTML reports and a year of data retention, still non-commercial only, and free for verified students and instructors through Tenable's education program. A 20-IP cap and a non-commercial clause rule it out for any company network, however small. Businesses that want a free scanner should look at the open-source options on our free vulnerability scanners page rather than stretch an Essentials license past its terms.

The per-asset alternative: Tenable One Vulnerability Management

Tenable's cloud platform is priced by asset, and that is the comparison that decides whether a flat Nessus license is cheap or expensive for you. On the buy page, Tenable One Vulnerability Management lists $3,700 for one year covering 100 assets, $7,215 for two years and $10,545 for three, with online purchase available up to 250 assets and a quote beyond. That works out to $37 per asset a year. Tenable One Web App Scanning is $5,250 a year for 5 fully qualified domain names.

The crossover sits around 130 assets. Below that, the cloud platform is cheaper than Professional and adds dashboards, asset tracking and Vulnerability Priority Rating. Above it, the flat Nessus license pulls ahead: at the same per-asset rate, 250 assets would come to about $9,250 a year against the flat Professional price. Per-asset platforms dominate our AI security tools coverage for the same reason. A consultant scanning many client networks never pays per asset, which is why Nessus Professional remains the consultant's edition. For the platform-level view and AI-assisted prioritization, see our AI for vulnerability management ranking.

How Nessus compares with scanners that do not print a price

Qualys publishes no list price. Its subscriptions page says pricing depends on the Cloud Platform apps selected, the number of IP addresses, web applications and user licenses, and every subscription includes unlimited scans and unlimited Cloud Agents for inventory. A team that wants the Qualys quote next to the Nessus number has our Nessus vs Qualys comparison. Intruder shows its plan prices only after you choose a target count, so check the current price on Intruder's site; its pentest service starts from $3,500 a test, which is a useful benchmark for what the Expert web app scanner is replacing.

Against those, Nessus's strength is that the number is public and flat. Its weakness is that the number is the same whether you scan 20 hosts or 20,000, so a small company pays a consultant's price for an internal scanner. The wider field, with the free and the per-asset options side by side, is on our vulnerability scanner ranking, and the offensive tools a pentester pairs with Nessus are on the penetration testing tools page.

Who should buy which Nessus

Buy Professional if you are a consultant, a pentester or an internal team of one or two running point-in-time assessments on more than about 130 hosts, and add Advanced Support if those scans run outside business hours. Buy Expert only if your scope includes a custom web application or an internet-facing footprint nobody has mapped, and you do not already pay for a tool that does either job. Buy Tenable One Vulnerability Management instead if you have fewer than 130 assets and want dashboards and history rather than a report per run. Use Essentials for a lab and nothing else.

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How we checked these prices

We read Tenable's Nessus Professional, Nessus Expert, Nessus Essentials and buy pages, and the Qualys subscriptions and Intruder pricing pages, on 17 October 2026. Three-year totals and per-asset rates are our arithmetic on the published figures. We did not purchase or run any of these products. Louis Corneloup, founder of Toolradar and Dupple, edited the verdict. Tenable changes these pages, so re-read the edition page before a purchase order.

FAQ

How much does Nessus cost in 2026?

Nessus Professional costs $4,790 for one year, $9,331 for two or $13,638 for three. Nessus Expert costs $6,790 for one year, $13,208 for two or $19,304 for three. Advanced Support is a yearly add-on on top. Prices were read on Tenable's pages on 17 October 2026 and are marked VAT inclusive.

What is the difference between Nessus Professional and Nessus Expert?

Expert adds web application scanning for custom application code and external attack surface scanning, which Tenable describes as 5 domains per quarter. Both editions share unlimited IT vulnerability assessments, compliance audits, CVSS v4 and EPSS scoring, configurable reports and community support. The difference in list price is $2,000 a year.

Is there a free version of Nessus?

Yes. Nessus Essentials is free for up to 5 IPs on a 30-day license, with delayed plugin updates and no reporting, and it is for non-commercial use only. Essentials Plus costs $199 a year for 20 IPs with real-time updates and basic reports, also non-commercial, and is free for verified students and instructors. Neither may be used on a company network.

Does Nessus charge per IP or per asset?

Nessus Professional and Expert are flat licenses with unlimited assessments and no stated IP cap. Tenable's cloud platform, Tenable One Vulnerability Management, is the per-asset product, at $3,700 a year for 100 assets. The flat license is cheaper above roughly 130 assets and the cloud platform is cheaper below it.

Is Nessus Advanced Support worth it?

It is worth it for any team that scans outside business hours, because the base license includes community support only, and Advanced Support adds phone and chat 24 hours a day for up to 10 named contacts. A consultancy billing client maintenance windows loses more than that on one failed overnight scan.

Does Nessus Professional have a trial?

Yes. Tenable offers a free Professional trial from its product page without stating a length, and existing Professional customers can upgrade to Expert free for 7 days. The Essentials edition is a separate 30-day non-commercial license, not a Professional trial.

Cite this: Cyberpresso, "Nessus Pricing 2026: Professional vs Expert Annual Cost", October 2026.

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