Tenable
Vulnerability management & Nessus
- Security & Endpoint Protection
- Subscription
For · CISOs, security teams and IT departments at organisations with NIS2, DORA, ISO 27001 or SOC 2 obligations
Tenable is the market leader in vulnerability management and exposure management. Its best-known product is Nessus — one of the most widely used vulnerability scanners worldwide — alongside the enterprise platforms Tenable Vulnerability Management (formerly Tenable.io), Tenable Security Center and the overarching Tenable One. For organisations with NIS2, DORA or ISO 27001 obligations, a toolset like Tenable has become almost standard.
The licensing model is based on the number of assets (IP addresses, cloud resources, identities). This sounds simple, but the counting is notoriously complex: IoT devices, container instances and ephemeral cloud workloads can rapidly increase the asset count. Organisations that do not actively manage their asset inventory see their Tenable invoices rise year on year without a corresponding increase in security level.
Procurement considerations
- Scrub your asset inventory before every renewal
The biggest cost saver with Tenable is a clean asset inventory. Carry out a scrub just before renewal: remove old hosts, inactive cloud resources and duplicates. In practice, 10-20% of assets can be cleared — with a direct impact on the licence price.
- Compare individual products with Tenable One
Tenable offers Nessus, Tenable Vulnerability Management, Cloud Security, Identity Exposure and more as standalone modules or as the Tenable One bundle. For organisations using multiple modules, the bundle price is almost always better — but only if those modules are actually used.
- Negotiate a multi-year price lock
Multi-year contracts (2-3 years) deliver substantial discounts and protect against mid-term price hikes. For a mature security programme where Tenable is a structural part of the stack, this is often more financially attractive than annual renewals.
- Use Qualys and Rapid7 as leverage
Tenable faces strong competitors (Qualys, Rapid7, Wiz for cloud). When seriously comparing these alternatives during a renewal process, negotiating room arises. An independent procurement partner can explore this beforehand without reputational risk.
Compliance risks
- EU data location vs US tenant
Tenable Vulnerability Management runs on AWS in specific regions. For organisations under NIS2 or with sector-specific data location requirements, it is mandatory to select the EU instance and contractually secure this. This is not always the default.
- Scan data contains sensitive security intelligence
Tenable scan results provide detailed insight into vulnerabilities per host. This is valuable but also sensitive: leakage of this data is a blueprint for attackers. Role-based access and audit logging must be actively configured — these are not defaults.
- Ghost assets in the cloud
Cloud scanners and agents inventory ephemeral resources that appear and disappear within hours. Without proper configuration, these still count towards the licence invoice despite offering little actual security value. Audit this every quarter.
Frequently asked questions about Tenable
Frequently asked questions about Tenable licences and procurement.
What is the difference between Nessus Professional and Tenable Vulnerability Management?
Nessus Professional is a standalone scanner for pentesters and smaller teams. Tenable Vulnerability Management is the cloud-based platform with continuous monitoring, dashboards, reporting and multi-user collaboration. For an enterprise security programme, the platform is almost always necessary.
Do I need Tenable One or are standalone products enough?
Tenable One is an exposure management platform bundling vulnerability management, cloud security, identity exposure and attack surface management. For large organisations with multiple Tenable products, it offers a bundle price and one central dashboard — but only interesting if you actually use those modules.
How does Tenable count assets exactly?
Tenable generally counts active assets within a measurement period. The exact definition differs per product (VM vs Cloud Security vs Identity Exposure). SoftVaro helps by carefully reviewing the asset definition in your contract so you don’t keep paying for “dead” assets.
Relevant knowledge base articles
Getting a better deal with Tenable?
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