We may earn a commission if you buy through links on this page. It never changes a score or a ranking. How we make money
It's a split decision.
Pick Nessus if your priority is vulnerability scanning with a published license price: the pricing page lists unlimited scans and a $4,790 one-year Professional license. Choose Qualys if you need a broader IT security and compliance platform spanning asset, vulnerability, remediation, detection, and compliance apps, and can accept custom pricing. Qualys’ monthly and annual prices are not published, and its limits depend on licensed IPs, web apps, and user licenses. Neither lists a free plan.
01Side by side
| Nessus | Qualys | |
|---|---|---|
| Starting price | $399.17/license/month annual equivalent; $4,790 one-year license | Custom; monthly and annual prices not published |
| Free plan | No | No |
| Best for | Core vulnerability assessment teams | Organizations licensing Qualys security apps |
| Core strength | Unlimited vulnerability scanning and real-time updates | Risk, vulnerability, remediation, detection, and compliance apps |
| Learning curve | Not specified on the vendor's site | Not specified on the vendor's site |
| Integrations/data | Nessus-specific integrations not published | Maps cyber assets across attack surfaces |
| Team/seat costs | Per license; $4,790 for one year | Custom; depends on IPs, web apps, and user licenses |
| Support | Advanced Support add-on; price not published | Support details not published on the vendor's site |
Nessus Choose Nessus if
- Choose Nessus if vulnerability scanning is your main need.
- Choose Nessus if you want a published license price.
- Choose Nessus if unlimited vulnerability scanning fits your team.
Qualys Choose Qualys if
- Choose Qualys if you need broader security and compliance apps.
- Choose Qualys if asset management across attack surfaces matters.
- Choose Qualys if custom pricing fits your procurement process.
02Pricing compared
Nessus has the clearer price. The pricing page lists Nessus Professional at $4,790 for a one-year license, or $399.17 per month as an annual equivalent—not a monthly billing price. The license includes unlimited vulnerability scanning. Nessus Expert costs $6,790 for one year, an annual equivalent of $565.83 per month, and adds web app scanning and external attack surface discovery scanning. Qualys does not publish monthly or annual prices. Its subscription is customized by apps, licensed IPs, web applications and user licenses; the plan listing includes unlimited scans and unlimited Cloud Agents (Inventory), plus Global AssetView. Neither product lists a free plan, and trial availability is not published. If you need a known entry price, Nessus is easier to budget; Qualys requires a quote.
03Features and depth
The published Tenable homepage describes Tenable One, not Nessus by name, so its broader exposure-management claims should not be treated as a Nessus feature list. Nessus Professional’s listed core is vulnerability scanning, with unlimited scans and real-time vulnerability updates. Nessus Expert adds web application scanning and external attack surface discovery scanning.
Qualys is presented as a broader IT security and compliance platform. Its apps cover asset management, vulnerability and configuration risk, remediation and re-validation, cloud and endpoint detection and response, policy compliance, security assessments and file integrity monitoring. The published information also lists AI asset discovery, AI risk assessment and governance evidence. Its subscription includes Global AssetView, but capacity depends on licensed IPs, web applications and user licenses. That points to a wider set of security and compliance workflows than Nessus’s listed scanning offer, though the sources do not provide a like-for-like feature matrix. Choose based on the work you need covered, not on the platform descriptions alone.
04Ease of use and learning curve
The published product and pricing details do not document setup time, interface complexity, training needs or onboarding for either product, so we can’t make a firm learning-curve comparison. The review summaries score Nessus 6/10 for ease of use and Qualys 5/10, but provide no methodology or specific usability examples. The Qualys summary also notes recurring complaints about usability and reporting; that is a warning to investigate, not a measured comparison. Nessus has a narrower listed scope, which may make it simpler to evaluate for teams focused on vulnerability scanning, but the sources do not establish that it is easier to deploy or operate. Ask both vendors for a workflow-specific demo and confirm what your license covers before switching.
Questions people ask
Are Qualys and Tenable the same?
No. The published material describes Qualys as a cyber risk management platform and Tenable One as Tenable’s exposure management platform. Nessus is listed separately as a Tenable product, though the published Tenable homepage does not describe Nessus by name. They are different vendors and product offerings.
What is the difference between a Tenable agent scan and an active scan?
The published sources do not explain Tenable agent scans or active scans, so we can’t give a source-grounded comparison of how they work or when to use each. They list Nessus scanning features and Qualys Cloud Agents, but do not define scan types or compare agent-based and active scanning.
What is Tenable used for?
The vendor's homepage describes Tenable One as an exposure management platform for security visibility, risk insight and coordinated remediation across infrastructure, cloud, identity, OT, third-party applications and AI. That describes Tenable One; the homepage does not explain Nessus by name.
Which is better, OpenVAS or Nessus?
The published information covers Nessus and Qualys, not OpenVAS, so it does not support a direct comparison. For Nessus, the pricing page lists unlimited vulnerability scanning with a $4,790 one-year Professional license. We can’t assess OpenVAS features, limits or price from these sources.