Softwr

Cloud · head to head

Puppet vs Tenable Nessus

Puppet logo

Puppet

Cloud

Infrastructure automation for enterprises

From
Free
Rated
-
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Puppet no pricing published for commercial tiers; requires contacting sales; Tenable Nessus nessus Professional is $4,790 for one year, sold as an annual licence rather than a per scan or usage based fee
  • They diverge on capability: Puppet covers Manifests, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Puppet and Tenable Nessus actually diverge.

Attributes where Puppet and Tenable Nessus differ
AttributePuppetTenable Nessus
Pricing modelquotesubscription
PlatformsLinux, Windows, Mac, ApiWindows, Linux, Macos, Cloud
CategoryCloudCybersecurity
Founded20052002

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Puppet

  • Manifests
  • Modules
  • Classes
  • Variables
  • Facts
  • Puppet Master
  • Hiera
  • Facter

Only in Tenable Nessus

  • Network scanning
  • Vulnerability detection
  • Configuration assessment
  • Malware detection
  • Compliance checking
  • Cloud security assessment
  • Mobile scanning
  • API access

Both cover

  • AWS
  • Azure
  • Cloud deployment
  • Windows support

What people use each for

The jobs each tool is most often brought in to do.

Puppet

  • Infrastructure automationnot Tenable Nessus
  • Configuration managementnot Tenable Nessus
  • DevOps at scalenot Tenable Nessus
  • Enterprise infrastructurenot Tenable Nessus

Tenable Nessus

  • Vulnerability scanning of servers, network devices and web applicationsnot Puppet
  • Configuration and compliance auditing against hardening benchmarksnot Puppet
  • Point in time assessments by consultants and penetration testersnot Puppet

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Puppet

  • No pricing published for commercial tiers; requires contacting sales
  • Enterprise and Advanced tiers require custom quote
  • Free tier limited to 25 nodes maximum

Tenable Nessus

  • Nessus Professional is $4,790 for one year, sold as an annual licence rather than a per scan or usage based fee
  • Support beyond the base entitlement costs an extra $400 per year for Advanced Support with 24x365 phone and chat access
  • The on demand training course is a separate $275 purchase for a single person for one year
  • Multi year discounts require paying for two or three years up front

Pricing, plan by plan

Puppet

Free
  • DeveloperFree
    • Up to 25 nodes
  • Core Commercial$null/custom
    • 25+ nodes
    • Vendor-backed SLAs
    • Training with Certified Engineers
  • Enterprise$null/custom
    • Web GUI
    • RBAC
    • Multi-environment support
  • Advanced$null/custom
    • AI-powered features
    • Advanced patching
    • Vulnerability remediation

Tenable Nessus

Free
  • Nessus EssentialsFree
    • Up to 16 ips
    • Network scanning
    • Vulnerability assessment
  • Nessus Professional$2600/year
    • Unlimited targets
    • Enterprise features
    • Advanced analytics
  • Nessus Expert$5200/year
    • All Professional features
    • Cloud integration
    • Advanced reporting

Which should you pick?

Choose Puppet if

  • You need manifests.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Api.
  • You also want modules.
Puppet review

Choose Tenable Nessus if

  • You need network scanning.
  • You want to start without paying.
  • You work on Windows, Linux, Macos, Cloud.
  • You also want vulnerability detection.
Tenable Nessus review

Questions people ask

Is Puppet or Tenable Nessus better?
Neither clearly leads. Puppet starts at Free and Tenable Nessus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Puppet or Tenable Nessus?
Puppet starts at Free and Tenable Nessus at Free.
Does Puppet or Tenable Nessus run on more platforms?
Puppet runs on Linux, Windows, Mac, Api. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Puppet for free?
Both have a free tier, so you can try either at no cost before committing.
What is Puppet best used for?
Puppet is most often used for infrastructure automation, configuration management, devops at scale, enterprise infrastructure. Of those, infrastructure automation and configuration management are not what Tenable Nessus is typically brought in for.
What can Puppet do that Tenable Nessus cannot?
Puppet covers Manifests, Modules, Classes, Variables. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection. Both handle AWS, Azure, Cloud deployment, Windows support.

Answered from the vendors’ own pages

Puppet: How much does Puppet cost?

Puppet's Developer tier is free for up to 25 nodes. Commercial, Enterprise, and Advanced tiers require contacting their sales team for a custom quote.

Source
Tenable Nessus: What are the three Nessus offerings?

Nessus Essentials is a free introductory offering for educators, students, and career starters, limited to 16 IPs for scanning. Nessus Professional is designed for consultants and SMBs, providing unlimited IT scans across any location. Nessus Expert is the premium offering extending Professional with web application scanning, infrastructure-as-code scanning, and external attack surface assessment up to 5 domains.

Source
Puppet: Is there a free version of Puppet?

Yes, Puppet's Developer tier is free forever for up to 25 nodes of infrastructure.

Source
Tenable Nessus: What OS platforms does Nessus support?

Nessus runs on Debian/Kali Linux, Fedora, FreeBSD, Mac OS X, Red Hat/CentOS, SUSE Linux, Ubuntu, and various Windows versions including Server 2008, 2012, and Windows 7-10.

Source
Puppet: What does the Enterprise tier include?

Puppet's Enterprise tier includes web GUI, RBAC, and multi-environment support for organizations managing infrastructure at scale, with pricing available upon request.

Source
Tenable Nessus: Can I use Nessus to scan third-party networks as a consultant?

Yes, Tenable permits you to use Nessus to scan third-party networks. Nessus Professional is ideal for consultants.

Source
Tenable Nessus: Can Nessus perform PCI external scanning?

Yes, you can use Nessus Professional to perform external network scans as required by the PCI DSS 11.2.2 requirement.

Source
Tenable Nessus: What additional features does Nessus Expert provide?

Web application scanning, which is dynamic application security testing (DAST) providing comprehensive visibility and insight into web application security issues; scanning code repositories for vulnerabilities; and assessing external attack surface with subdomain discovery.

Source
Tenable Nessus: What support options exist for Nessus Professional?

Standard Support includes software upgrades, patches, plugin access, and 24x7 support via chat and community portal. Advanced Support adds 24x7 phone access and committed SLAs: P1 less than 2 hours, P2 less than 4 hours, P3 less than 12 hours, P4 less than 24 hours.

Source
Tenable Nessus: How frequently are Nessus plugins updated?

Nessus plugins are updated daily, based on when vendors and security research sites publish new vulnerabilities.

Source
Tenable Nessus: How does licensing work in virtual machine environments?

Whether you are using Nessus in a physical or a virtual environment, the IP addresses or hosts that you are scanning from must be licensed.

Source
Share

Related pages

More on Puppet

More on Tenable Nessus

Keep looking

Other head to heads