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Government · head to head

Azure Government vs Tenable Nessus

Azure Government logo

Azure Government

Government

Trusted Cloud for Government

From
On request
Free plan
No
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Tenable Nessus has a free tier, so it costs nothing to try first.
  • Each has a real cost: Azure Government restricted to US government entities, their solution providers and contractors handling government data, with Microsoft validating eligibility first; 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: Azure Government covers FedRAMP High Authorized, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Azure Government and Tenable Nessus actually diverge.

Attributes where Azure Government and Tenable Nessus differ
AttributeAzure GovernmentTenable Nessus
Starting priceOn requestFree
Pricing modelusage-basedsubscription
Free tierNoYes
PlatformsWeb, Cli, SdkWindows, Linux, Macos, Cloud
CategoryGovernmentCybersecurity
Founded19752002

Identical on both: 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 Azure Government

  • FedRAMP High Authorized
  • DOD IL5 Approved
  • Isolated Datacenters
  • Hybrid Cloud
  • AI & ML Services
  • Microsoft 365
  • Dynamics 365
  • Power Platform

Only in Tenable Nessus

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

What people use each for

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

Azure Government

  • Hosting US government workloads in dedicated domestic datacentresnot Tenable Nessus
  • Systems needing FedRAMP High, DoD IL2 to IL5, CJIS or ITAR authorisationnot Tenable Nessus
  • State, local and tribal government cloud servicesnot Tenable Nessus
  • Contractors processing controlled government datanot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Azure Government

  • Restricted to US government entities, their solution providers and contractors handling government data, with Microsoft validating eligibility first
  • A narrower service catalogue than commercial Azure
  • New features arrive later than in the commercial regions
  • Pricing is not published and runs through federal contract vehicles such as JWCC, GSA and NASA SEWP

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

Azure Government

On request
  • Pay-as-you-goFree
    • Virtual Machines
    • Azure SQL
    • Storage

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 Azure Government if

  • You need fedramp high authorized.
  • You work on Web, Cli, Sdk.
  • You also want dod il5 approved.
Azure Government 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 Azure Government or Tenable Nessus better?
Neither clearly leads. Azure Government 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, Azure Government or Tenable Nessus?
Tenable Nessus has a free tier; the other does not. Paid plans start at On request for Azure Government and Free for Tenable Nessus.
Does Azure Government or Tenable Nessus run on more platforms?
Azure Government runs on Web, Cli, Sdk. 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. Azure Government starts at On request.
What is Azure Government best used for?
Azure Government is most often used for hosting us government workloads in dedicated domestic datacentres, systems needing fedramp high, dod il2 to il5, cjis or itar authorisation, state, local and tribal government cloud services, contractors processing controlled government data. Of those, hosting us government workloads in dedicated domestic datacentres and systems needing fedramp high, dod il2 to il5, cjis or itar authorisation are not what Tenable Nessus is typically brought in for.
What can Azure Government do that Tenable Nessus cannot?
Azure Government covers FedRAMP High Authorized, DOD IL5 Approved, Isolated Datacenters, Hybrid Cloud. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

Azure Government: How is Azure Government pricing determined?

Azure pricing follows a pay-as-you-go model where you only pay for services you use. Prices vary by product, region, and usage patterns. Committed use discounts and reserved instances can save up to 65% for compute services.

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
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
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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