Action1 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

Action1

0.0 (0 reviews)

Action1 is a cloud-native patch management platform that provides automated third-party software updates and vulnerability remediation to secure your remote and office-based Windows endpoints effectively.

Starting at Free
Free Trial 15 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 Action1 Tenable Nessus
Website action1.com tenable.com
Pricing Model Freemium Freemium
Starting Price Free Free
FREE Trial ✓ 15 days free trial ✓ 7 days free trial
Free Plan ✓ Has free plan ✓ Has free plan
Product Demo ✓ Request demo here ✓ Request demo here
Deployment saas saas on-premise desktop
Integrations ServiceNow Jira Slack Microsoft Teams Azure AD Okta ConnectWise Autotask ServiceNow Splunk AWS Microsoft Azure Google Cloud Platform Jira Slack IBM QRadar
Target Users small-business mid-market enterprise small-business mid-market enterprise
Target Industries
Customer Count 0 0
Founded Year 2018 2002
Headquarters Houston, USA Columbia, USA

Overview

A

Action1

Action1 provides a cloud-native solution to manage and secure your entire fleet of Windows endpoints from a single console. You can automate the discovery of missing patches, deploy updates for both OS and third-party applications, and remediate vulnerabilities in real-time without needing a VPN. It helps you maintain a hardened security posture by identifying unauthorized software and outdated configurations across your distributed workforce.

The platform simplifies IT operations by replacing complex legacy tools with a lightweight agent and a web-based interface. You can execute remote scripts, manage software inventory, and generate compliance reports with just a few clicks. It is designed for IT service providers and internal IT departments who need to scale their security efforts without increasing administrative overhead.

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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

A

Action1 Features

  • Automated Patching Schedule and deploy updates for Windows OS and common third-party apps automatically to keep your systems secure.
  • Vulnerability Assessment Identify missing security patches and system weaknesses in real-time so you can prioritize critical fixes immediately.
  • Remote Desktop Access Connect to remote computers securely to provide technical support and troubleshoot issues without leaving your desk.
  • Software Inventory Track every application installed across your network and remove unauthorized or dangerous software with a single click.
  • IT Asset Reporting Generate detailed reports on hardware and software configurations to ensure your fleet meets internal compliance standards.
  • Remote Script Execution Run PowerShell or Command Prompt scripts across multiple endpoints simultaneously to automate your routine maintenance tasks.
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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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Action1 Pricing

Free Edition
$0
  • First 100 endpoints free
  • Full feature set included
  • Automated patch management
  • Vulnerability scanning
  • Software inventory
  • Community support
T

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

M

Action1

Pros

  • First 100 endpoints are free forever
  • Extremely fast and easy agent deployment
  • Clean interface requires almost no training
  • Reliable third-party patching for common apps
  • Cloud-based console works without a VPN

Cons

  • Currently limited to Windows operating systems
  • Reporting customization can feel a bit rigid
  • Mobile app functionality is currently unavailable
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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