Tenable Pricing 2026: Ultimate Guide for Security Products

If a Tenable quote or a Nessus renewal is on your desk, start with Tenable pricing as the vendor publishes it. Its buy page lists Nessus Professional, Nessus Expert, Tenable One Vulnerability Management (formerly Tenable.io) and Web App Scanning; Tenable One Exposure Management, Tenable Security Center and other products are sold by quote. This guide uses the US prices that page showed on October 19, 2026.

Note: Tenable shows prices in local currency by region, so buyers outside the US see different figures.

Key takeaways:

• Nessus Professional costs $4,790 a year and Nessus Expert $6,790, at Tenable’s US list price.
• Tenable One Vulnerability Management costs $3,700 a year for 100 assets, or $37 per asset.
• Tenable sells up to 250 assets online; larger estates, Tenable One and Security Center need a quote.
• Vendr’s 2026 data puts the median Tenable buyer at $22,047 a year.

How Much Does Tenable Cost in 2026?

Tenable publishes US prices for its Nessus scanners, Vulnerability Management and Web App Scanning, and sells its larger platforms by quote. Here is what each product costs at US list prices in 2026.

Tenable One Vulnerability Management (formerly Tenable.io) costs $3,700 a year for 100 assets and $9,250 for 250 assets, the largest size Tenable sells online.

Tenable Security Center (formerly Tenable.sc), the on-premises version, is sold by quote only.

Tenable One, the exposure management platform, is sold by quote only, in Foundation and Advanced packages.

Tenable Nessus Professional, the commercial Nessus scanner, costs $4,790 a year, and Nessus Expert costs $6,790.

Tenable One Web App Scanning costs $5,250 a year for 5 FQDNs, the web application domains it scans.

If nobody watches the hosts Tenable flags while they wait for a patch, the UnderDefense Agentic AI SOC works on top of the SIEM and EDR you already run, investigates every alert on those hosts around the clock, and leaves the response decisions to its analysts.

Tenable Pricing Comparison Table

The table lists each Tenable product with its published US price for one year, as Tenable’s buy page showed it on October 19, 2026, and marks the products Tenable sells by quote.

Tenable One Cloud Exposure, OT Exposure and Identity Exposure are also sold by quote, and add-ons such as Tenable One PCI ASV and Attack Surface Management are bought through Tenable sales.

Tenable Products Overview

Tenable offers a suite of cybersecurity products focused on vulnerability management, exposure visibility, and risk reduction across IT, cloud, and OT environments. The core lineup includes:

• Tenable One Vulnerability Management (formerly Tenable.io). A cloud-based vulnerability management platform for modern IT environments, offering continuous visibility into assets, vulnerabilities, and misconfigurations.
• Tenable Security Center (formerly Tenable.sc). An on-premises solution designed for organizations that require local control, advanced analytics, and integration with existing security tools.
• Tenable One. An exposure management platform that unifies data across Tenable’s tools to provide a risk-based view of an organization’s entire attack surface.
• Tenable Nessus. The vulnerability scanner behind Tenable’s products, sold as Essentials, Essentials Plus, Professional and Expert.
• Tenable One OT Exposure. Built to secure operational technology (OT) networks, with asset inventory, vulnerability management and configuration controls for industrial systems.

Together, these products find, prioritize and track vulnerabilities across IT, cloud, web applications and OT, and feed compliance reporting. If you are weighing Tenable against other vendors, a 2026 roundup of Tenable alternatives compares nine vulnerability and exposure platforms.

Tenable.io Pricing: $3,700 a Year for 100 Assets

Tenable.io now sells as Tenable One Vulnerability Management, at $37 per asset a year online, from a minimum of 100 assets to a maximum of 250. Two-year and three-year terms for 100 assets cost $7,215 and $10,545. According to Tenable’s licensing documentation, each license includes unlimited Nessus scanners, agents and API access, and an asset counts once it has been assessed for vulnerabilities in the past 90 days.

This plan includes:

• Cloud-native vulnerability management
• Asset discovery and inventory
• Optional container and web app scanning (add-ons)
• Predictive prioritization for remediation
• Integration with CI/CD pipelines and ITSM tools

Pros of Tenable.io:

• Scalable and quick to deploy
• Continuous visibility into IT environments
• Strong API and automation support

Cons of Tenable.io:

• Can become expensive with asset growth
• May require training for full utilization
• Cloud-only may not suit air-gapped environments

Tenable Security Center Pricing and Features (Tenable.sc)

Tenable Security Center, formerly Tenable.sc, runs on your own infrastructure, and Tenable sells it by quote only: its buy page sends Security Center buyers to a custom quote form. Vendr’s 2026 Tenable analysis says Security Center is priced per managed IP address, with perpetual or subscription licenses, and that perpetual licenses carry annual maintenance of typically 18% to 22% of the license cost.

Key features include:

• Centralized on-premises vulnerability analytics
• Role-based access control and compliance dashboards
• Historical trend analysis
• Custom policy management
• Integration with Nessus scanners

Pros of Tenable.sc:

• Strong fit for organizations needing full data control
• Rich compliance and audit support
• Ideal for regulated industries

Cons of Tenable.sc:

• Requires server infrastructure and maintenance
• Not optimized for dynamic cloud environments
• Slower setup compared to cloud-based alternatives

Tenable One Pricing and Features

Tenable One is sold by quote in two packages, Foundation and Advanced, with CNAPP, AI governance and identity security as optional enhancements, according to the Tenable One pricing page. Under Tenable’s licensing guide, each resource type converts into Tenable One assets at one price per asset: an identity counts as 0.5 asset, and a Cloud Exposure CIEM billable asset counts as 3.

Key features include:

• Combines Tenable tools under one risk-centric dashboard
• Exposure analytics across IT, cloud, web, and OT
• Attack path mapping and contextual prioritization
• Business risk scoring
• Executive-ready reporting

Pros of Tenable One:

• Unified view across all Tenable tools
• Enables business-aligned decision-making
• Strong value for large enterprises

Cons of Tenable One:

• Higher price point
• Most effective when bundled with other Tenable solutions
• Requires planning and integration resources

Tenable Nessus Pricing: Essentials, Professional and Expert

Tenable Nessus comes in four editions, and two of them are licensed for commercial use. According to Tenable’s Nessus Essentials page, Nessus Essentials is a free 30-day license for up to 5 IPs, and Nessus Essentials Plus costs $199 a year for up to 20 IPs, free for verified students and instructors. Both are for personal, educational and non-commercial use, without compliance checks, data export or technical support.

Nessus Professional Pricing: $4,790 per Year

Nessus Professional, often shortened to Nessus Pro, is the commercial edition: unlimited IPs, real-time plugin updates, compliance and configuration checks, and technical support, at the price in the heading. Tenable lists a two-year license at $9,331 and a three-year license at $13,638, and Advanced Support adds 24/7 phone and chat access. Nessus Expert, at $6,790 a year, adds web app scanning and external attack surface discovery.

A Nessus scan lists known vulnerabilities, while a penetration test shows which of them an attacker can chain together, so penetration testing cost sits on a separate budget line.

Key features include:

• Deployment on many platforms, including Raspberry Pi
• Real-time plugin updates for new vulnerabilities
• Compliance auditing and configuration scanning
• Offline scanning support
• Pre-built and customizable policies

Pros of Tenable Nessus:

• High-accuracy vulnerability scanning
• Widely used and trusted across industries
• Simple setup and fast time to value

Cons of Tenable Nessus:

• Not a full enterprise vulnerability platform
• Limited asset management and trend reporting

Hidden Costs and What Actually Drives the Price

The license line is only part of a Tenable bill. These items, each documented by Tenable or Vendr, move the total most:

• Crossing 250 assets. Tenable sells Vulnerability Management online only up to 250 assets; above that, a sales quote sets the per-asset rate.
• Web apps license separately. A host and the web application on it count as two assets, according to Tenable’s Web App Scanning licensing page.
• Scanning past your license. If you scan more assets than you licensed for 30 days or more, Tenable disables scan and export features.
• Training. The Nessus Fundamentals on-demand course costs $275 per person, and Advanced Support is a separate add-on.
• Services. Vendr’s 2026 analysis says implementation and integration services are quoted separately, commonly $15,000 to $75,000 for mid-sized enterprises.

For a budget check, Vendr’s 2026 data on 130 Tenable purchases puts the median buyer at $22,047 a year, with deals from $5,110 to $125,731 and average savings of 11%. Price the same asset count with a second vendor before you sign; Qualys pricing is also set per asset.

Cost Breakdown by Asset Count: Real-World Examples

These examples add up Tenable’s published US prices for one year, before tax and before any discount from Tenable sales.

At 500 assets, Tenable publishes no price. Straight arithmetic at the online per-asset rate gives $18,500, a figure Tenable does not publish, so use it only as a yardstick when you read a quote. Rapid7 pricing is worth checking on the same 500-asset count.

How UnderDefense Works on Top of Tenable

Tenable tells you which hosts are exploitable, and someone still has to watch them until the patch lands. Verizon’s 2026 DBIR found exploitation of vulnerabilities was the most common initial access vector, at 31%, and only 26% of critical CISA KEV vulnerabilities were fully remediated in 2025, with a median of 43 days.

UnderDefense, which publishes this guide, does not sell vulnerability management. It builds an agentic AI platform that unifies security operations and compliance on top of the SIEM, EDR and identity tools you already own. While Tenable findings wait for a patch, the table shows what changes for your team.

If Tenable findings already flow into your SIEM, the UnderDefense Copilot answers questions about your assets and risks directly from that data lake, part of the AI SOC on existing SIEM model.

Hosts waiting on a patch? Bring a week of alerts and book a triage demo.

Tenable Pricing FAQ