Cisco ISE vs Tenable Nessus Comparison: Reviews, Features, Pricing & Alternatives in 2026

Detailed side-by-side comparison to help you choose the right solution for your team

Updated Apr 2026 8 min read

Cisco ISE

0.0 (0 reviews)

Cisco Identity Services Engine is a network administration product that enables you to create and enforce security policies for users and devices connecting to your organization's network infrastructure.

Starting at --
Free Trial 90 days
VS

Tenable Nessus

0.0 (0 reviews)

Nessus is a vulnerability assessment solution providing deep-point-in-time scans to identify security flaws, misconfigurations, and malware across your modern IT infrastructure, including cloud, containers, and traditional assets.

Starting at Free
Free Trial 7 days

Quick Comparison

Feature Cisco ISE Tenable Nessus
Website cisco.com tenable.com
Pricing Model Custom Freemium
Starting Price Custom Pricing Free
FREE Trial ✓ 90 days free trial ✓ 7 days free trial
Free Plan ✘ No free plan ✓ Has free plan
Product Demo ✓ Request demo here ✓ Request demo here
Deployment saas on-premise saas on-premise desktop
Integrations Cisco DNA Center Splunk ServiceNow Microsoft Azure AD Okta Check Point Palo Alto Networks Rapid7 Tenable Qualys ServiceNow Splunk AWS Microsoft Azure Google Cloud Platform Jira Slack IBM QRadar
Target Users mid-market enterprise small-business mid-market enterprise
Target Industries
Customer Count 0 0
Founded Year 1984 2002
Headquarters San Jose, USA Columbia, USA

Overview

C

Cisco ISE

Cisco Identity Services Engine (ISE) gives you a centralized way to manage security across your entire network. You can see exactly who and what is connecting to your environment, whether they are using a wired, wireless, or VPN connection. By gathering real-time data from users and devices, you can make informed decisions about who gets access to specific resources and under what conditions.

You can automate your network security by creating granular policies that adapt based on the user's role, device type, and location. This helps you stop threats before they spread by automatically isolating suspicious devices. Whether you are managing a corporate office or a distributed workforce, it provides the visibility you need to maintain a zero-trust security posture without slowing down your team.

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Tenable Nessus

Nessus helps you identify and fix security vulnerabilities before attackers can exploit them. You can scan your entire environment—including cloud instances, web applications, and traditional network hardware—to find missing patches, software flaws, and configuration errors. It provides a clear view of your attack surface so you can prioritize the most critical risks to your business.

You can choose between different versions depending on your needs, ranging from a free version for educators and students to professional and expert versions for security consultants. It simplifies the complex task of vulnerability assessment with pre-built templates and automated reporting. Whether you are securing a small office or a complex hybrid-cloud environment, you can rely on its extensive plugin library to stay protected against the latest threats.

Overview

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Cisco ISE Features

  • AI Endpoint Analytics Identify and profile every device on your network automatically using AI-driven behavioral modeling to eliminate blind spots.
  • Zero Trust Access Enforce software-defined segmentation to ensure you only grant users access to the specific applications they need for work.
  • Automated Containment Block or quarantine compromised devices instantly through integrations with your security tools to prevent lateral movement of threats.
  • Guest Access Management Create custom web portals for your visitors to provide secure, time-limited internet access without compromising your internal data.
  • Compliance Monitoring Check the security posture of every device before it connects to ensure they meet your corporate encryption and antivirus standards.
  • Centralized Policy Management Define your security rules once and push them across your entire global network from a single, unified management console.
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Tenable Nessus Features

  • Pre-Built Scan Templates. Start scanning immediately using over 450 pre-configured templates for common audits like PCI-DSS and HIPAA compliance.
  • Live Results. Perform offline vulnerability analysis against your scan history to find new threats without running a new scan.
  • Cloud Infrastructure Scanning. Assess your cloud-native assets and identify misconfigurations in AWS, Azure, and Google Cloud environments easily.
  • Customizable Reporting. Create tailored reports in multiple formats like HTML or PDF to share critical security findings with your stakeholders.
  • Web Application Scanning. Identify vulnerabilities in your web applications and APIs to prevent common attacks like SQL injection and cross-site scripting.
  • External Surface Discovery. Find and map your internet-facing assets to understand what an attacker sees when looking at your organization.

Pricing Comparison

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Cisco ISE Pricing

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Tenable Nessus Pricing

Nessus Essentials
$0
  • Scan up to 16 IP addresses
  • High-speed accurate scanning
  • Community support access
  • Standard vulnerability assessment
  • Free for educators and students

Pros & Cons

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Cisco ISE

Pros

  • Unmatched visibility into every device connected to your network
  • Granular policy control for complex enterprise environments
  • Seamless integration with the broader Cisco security ecosystem
  • Powerful automation for isolating and remediating infected endpoints
  • Highly scalable for global organizations with thousands of users

Cons

  • Significant learning curve for initial setup and configuration
  • Requires substantial hardware resources for on-premise deployments
  • Licensing structure can be complex to navigate and manage
A

Tenable Nessus

Pros

  • Extremely high accuracy with very low false-positive rates
  • Massive library of plugins updated daily for new threats
  • Easy to set up and run your first scan quickly
  • Detailed remediation instructions help you fix issues faster

Cons

  • Annual subscription cost is high for small businesses
  • Interface can feel dated compared to newer cloud platforms
  • Reporting customization requires a learning curve to master
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