Qualys vs Tenable Nessus
Side-by-side comparison of features, pricing, ratings, and alternatives.
Qualys is an enterprise cyber risk and security platform built to help organizations "measure, communicate, and eliminate cyber risk." Its flagship VMDR (Vulnerability Management, Detection and Response) product continuously and automatically discovers assets across a network, including endpoints, servers, cloud workloads, containers, and IoT devices, then scans and prioritizes vulnerabilities for remediation. The platform emphasizes consolidation, positioning itself as a way for organizations to streamline and automate security and compliance work onto a single cloud platform rather than juggling multiple point tools, aiming for greater agility, better outcomes, and lower cost. Qualys does not publish list pricing on its site; prospective customers request pricing through the company's sales team based on organization size and needed modules.
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.
- Broad asset discovery covering endpoints, cloud, containers, and IoT
- Platform consolidation reduces the need for multiple separate security tools
- Strong brand recognition and long track record in vulnerability management
- Continuous, automated scanning rather than one-off assessments
- Industry-standard, widely trusted scanner
- Extensive and frequently updated CVE/plugin coverage
- Multiple risk-scoring models for prioritization
- Flexible deployment including low-cost hardware
- No public pricing is available; requires contacting sales for a quote
- Full feature depth of individual modules is not detailed on the general homepage
- Best suited to organizations with dedicated security teams to act on findings
- 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 Qualys
View all →Vulnerability assessment scanner that finds, prioritizes, and helps remediate security weaknesses.
Alternatives to Tenable Nessus
View all →
Vulnerability management platform behind the widely used OpenVAS scanning engine, from appliance to free edition.
The Verdict
AI-generated from listing dataTenable Nessus offers a well‑known, on‑prem scanner with deep CVE coverage but requires expertise and upfront subscription cost; Qualys provides a cloud‑based, continuously automated platform suited for larger, resource‑rich teams, though pricing isn’t publicly disclosed.
Key differences
- •Deployment model: Tenable is desktop/on‑prem, Qualys is cloud/SaaS.
- •Scanning approach: Tenable runs periodic scans, Qualys offers continuous automated discovery and scanning.
- •Scope of asset coverage: Qualys explicitly includes endpoints, cloud, containers, and IoT; Tenable’s description focuses on OS and network.
- •Pricing transparency: Tenable lists subscription pricing, Qualys requires sales contact for any price.
- •Hardware flexibility: Tenable can run on low‑cost devices like Raspberry Pi; Qualys relies on cloud infrastructure.
Pricing & value
Tenable lists subscription cost; Qualys does not disclose pricing, making direct comparison impossible.
Ease of use / learning curve
Qualys provides continuous automated scanning, reducing manual setup; Tenable requires security expertise to interpret results.
Features & depth
Both offer extensive vulnerability detection; Tenable emphasizes CVE/plugin count, Qualys emphasizes broad asset discovery.
Integrations & ecosystem
Both expose APIs; no further integration details are provided.
Scalability
Qualys’ cloud SaaS scales automatically across global assets; Tenable runs on individual hardware, limited by deployment size.
Support
Tenable lists advanced support add‑on, documentation, and training; Qualys support details are not specified.
Choose Qualys if…
Large enterprises with dedicated security staff seeking continuous, cloud‑based vulnerability management.
Choose Tenable Nessus if…
Small to midsize teams needing on‑prem control, willing to invest in expertise and subscription.
Common questions
How is pricing structured for each product?
Tenable Nessus uses a paid subscription model; Qualys does not publish pricing and requires contacting sales.
Can the tools scan cloud and container environments?
Qualys explicitly covers cloud, containers, and IoT; Tenable’s description mentions OS and network scanning only.
What deployment options are available?
Tenable Nessus is a desktop/on‑prem application; Qualys is delivered as a cloud/SaaS platform.