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Cybersecurity · head to head

Palo Alto Networks Prisma Cloud vs Tenable Nessus

Palo Alto Networks Prisma Cloud logo

Palo Alto Networks Prisma Cloud

Cybersecurity

Cloud-native application protection platform

From
On request
Rated
-
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Tenable Nessus has a free tier, so it costs nothing to try first.
  • Each has a real cost: Palo Alto Networks Prisma Cloud listed on UK G-Cloud at £147.54 per unit for Palo Alto Networks Prisma Cloud, via reseller Phoenix Software Limited, with the billing period not stated on the listing; 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: Palo Alto Networks Prisma Cloud covers Cloud Security Posture Management, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Palo Alto Networks Prisma Cloud and Tenable Nessus actually diverge.

Attributes where Palo Alto Networks Prisma Cloud and Tenable Nessus differ
AttributePalo Alto Networks Prisma CloudTenable Nessus
Starting priceOn requestFree
Free tierNoYes
PlatformsWeb, ApiWindows, Linux, Macos, Cloud
Founded20052002

Identical on both: pricing model (subscription), user rating (Not yet rated), category (Cybersecurity).

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 Palo Alto Networks Prisma Cloud

  • Cloud Security Posture Management
  • Cloud Workload Protection
  • Cloud Network Security
  • Cloud Identity Security
  • Code Security
  • API Security
  • Data Security
  • Microsegmentation

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
  • Google Cloud
  • ServiceNow
  • SOC2 Type 2
  • ISO 27001

What people use each for

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

Palo Alto Networks Prisma Cloud

  • Cloud Securitynot Tenable Nessus
  • Cspmnot Tenable Nessus
  • Cwppnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Palo Alto Networks Prisma Cloud

  • Listed on UK G-Cloud at £147.54 per unit for Palo Alto Networks Prisma Cloud, via reseller Phoenix Software Limited, with the billing period not stated on the listing

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

Palo Alto Networks Prisma Cloud

On request
  • Cloud SecurityFree
    • CSPM
    • CWPP
    • CIEM
  • Code SecurityFree
    • IaC security
    • SCA
    • Secrets scanning
  • Prisma Cloud EnterpriseFree
    • Full platform
    • API security
    • Data security

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 Palo Alto Networks Prisma Cloud if

  • You need cloud security posture management.
  • You work on Web, Api.
  • You also want cloud workload protection.
Palo Alto Networks Prisma Cloud 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 Palo Alto Networks Prisma Cloud or Tenable Nessus better?
Neither clearly leads. Palo Alto Networks Prisma Cloud starts at On request and Tenable Nessus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Palo Alto Networks Prisma Cloud or Tenable Nessus?
Tenable Nessus has a free tier; the other does not. Paid plans start at On request for Palo Alto Networks Prisma Cloud and Free for Tenable Nessus.
Does Palo Alto Networks Prisma Cloud or Tenable Nessus run on more platforms?
Palo Alto Networks Prisma Cloud runs on Web, Api. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use Tenable Nessus for free?
Yes. Tenable Nessus has a free tier, so you can try it without paying. Palo Alto Networks Prisma Cloud starts at On request.
What is Palo Alto Networks Prisma Cloud best used for?
Palo Alto Networks Prisma Cloud is most often used for cloud security, cspm, cwpp. Of those, cloud security and cspm are not what Tenable Nessus is typically brought in for.
What can Palo Alto Networks Prisma Cloud do that Tenable Nessus cannot?
Palo Alto Networks Prisma Cloud covers Cloud Security Posture Management, Cloud Workload Protection, Cloud Network Security, Cloud Identity Security. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection. Both handle AWS, Azure, Google Cloud, ServiceNow.

Answered from the vendors’ own pages

Palo Alto Networks Prisma Cloud: How much does Prisma Cloud cost?

Prisma Cloud pricing is not published publicly. Pricing is provided through the sales team via a custom quote based on your deployment scope and requirements.

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
Palo Alto Networks Prisma Cloud: Is there a free trial for Prisma Cloud?

No free trial is available without contacting the sales team. The company offers a demo through the product demo center or by requesting a demo through their sales process.

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
Palo Alto Networks Prisma Cloud: What do I need to do to get Prisma Cloud pricing and start a trial?

You must contact the sales team via the Contact Us link or request a demo. Pricing details are provided only through direct sales engagement.

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
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