Softwr

Government · head to head

DemandStar vs Tenable Nessus

DemandStar logo

DemandStar

Government

Bid distribution network that is free for government agencies and charges the suppliers instead

From
Free
Free plan
Yes
Full reviewWebsite
Tenable Nessus logo

Tenable Nessus

Cybersecurity

Network vulnerability scanner

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: DemandStar coverage is opt-in by agency, so a supplier paying for a state tier receives only participating agencies and must still monitor other portals for the rest.; 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: DemandStar covers Free for agencies, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

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

Attributes where DemandStar and Tenable Nessus differ
AttributeDemandStarTenable Nessus
Pricing modelFree for agencies, per year by geographic coverage for supplierssubscription
PlatformsWebWindows, Linux, Macos, Cloud
CategoryGovernmentCybersecurity
FoundedUnknown2002

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 DemandStar

  • Free for agencies
  • Commodity code matching
  • eBidding
  • Plan holder lists
  • Supplier registration
  • Geographic subscription tiers

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.

DemandStar

  • A city purchasing officer who wants wider bid distribution without running a procurement to buy softwarenot Tenable Nessus
  • A contractor who works in three adjacent counties and wants notifications only for that footprintnot Tenable Nessus
  • An agency needing sealed electronic bid submission to replace paper deliveries to the clerknot Tenable Nessus
  • A supplier testing whether public sector work is viable before committing to a national subscriptionnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

DemandStar

  • Coverage is opt-in by agency, so a supplier paying for a state tier receives only participating agencies and must still monitor other portals for the rest.
  • The free supplier tier charges around 5 US dollars per bid document download, which turns an apparently free plan into a metered one as soon as you actually pursue opportunities.
  • State pricing ranges from roughly 100 to 1,499 US dollars with the variation driven by agency density, so suppliers cannot predict cost from geography alone.
  • Because agencies pay nothing, they have little leverage over the roadmap and features are driven by what makes supplier subscriptions sell.
  • The brand is being folded into Euna OpenBid following the Euna Solutions consolidation, so suppliers and agencies should expect the name and portal to change.

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

DemandStar

Free
  • Government agencyFree
    • Post unlimited solicitations
    • Access the supplier network
    • eBidding and plan holder lists
  • Supplier freeFree
    • Bid notifications for one agency of your choice
    • Bid document downloads charged around 5 USD each
    • Supplier profile and registration
  • Supplier county$60/year
    • All participating agencies within one county
    • Unlimited bid document access for that county
    • Approximate rate, varies by county
  • Supplier state$100/year
    • All participating agencies within one state
    • Priced from around 100 to 1,499 USD depending on agency density

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 DemandStar if

  • You need free for agencies.
  • You want to start without paying.
  • You also want commodity code matching.
DemandStar 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 DemandStar or Tenable Nessus better?
Neither clearly leads. DemandStar 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, DemandStar or Tenable Nessus?
DemandStar starts at Free and Tenable Nessus at Free.
Does DemandStar or Tenable Nessus run on more platforms?
DemandStar runs on Web. Tenable Nessus runs on Windows, Linux, Macos, Cloud.
Can I use DemandStar for free?
Both have a free tier, so you can try either at no cost before committing.
What is DemandStar best used for?
DemandStar is most often used for a city purchasing officer who wants wider bid distribution without running a procurement to buy software, a contractor who works in three adjacent counties and wants notifications only for that footprint, an agency needing sealed electronic bid submission to replace paper deliveries to the clerk, a supplier testing whether public sector work is viable before committing to a national subscription. Of those, a city purchasing officer who wants wider bid distribution without running a procurement to buy software and a contractor who works in three adjacent counties and wants notifications only for that footprint are not what Tenable Nessus is typically brought in for.
What can DemandStar do that Tenable Nessus cannot?
DemandStar covers Free for agencies, Commodity code matching, eBidding, Plan holder lists. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

DemandStar: Is DemandStar free for governments?

Yes, entirely. Agencies post solicitations and access the supplier network at no cost; suppliers fund the platform.

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
DemandStar: What do suppliers pay?

Free for one agency with roughly 5 USD per document download, about 60 USD a year per county, 100 to 1,499 per state, and 2,699 for national coverage.

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
DemandStar: Who owns DemandStar?

Euna Solutions, the public sector portfolio formerly known as GTY Technology, which also absorbed Bonfire and Ion Wave.

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
DemandStar: Does it cover every agency?

No. Only agencies that have opted in, which is the main limitation for suppliers buying wide coverage.

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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