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Government · head to head

Bidnet Direct vs Tenable Nessus

Bidnet Direct logo

Bidnet Direct

Government

Regional bid notification network where agencies post free and suppliers pay for alerts

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: Bidnet Direct suppliers pay for aggregation, not access: the same solicitations are generally published free on individual agency and state portals, so the subscription is only worth it if searching manually costs more than the fee.; 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: Bidnet Direct covers Regional purchasing groups, Tenable Nessus covers Network scanning.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Bidnet Direct and Tenable Nessus actually diverge.

Attributes where Bidnet Direct and Tenable Nessus differ
AttributeBidnet DirectTenable Nessus
Starting priceOn requestFree
Pricing modelquotesubscription
Free tierNoYes
PlatformsWebWindows, Linux, Macos, Cloud
CategoryGovernmentCybersecurity
FoundedUnknown2002

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 Bidnet Direct

  • Regional purchasing groups
  • Free agency publication
  • Supplier notification
  • Vendor registration
  • Bid document distribution
  • Award postings
  • Supplier diversity reporting

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.

Bidnet Direct

  • A small municipal purchasing department that needs competitive responses without building or paying for its own bid portalnot Tenable Nessus
  • A contractor that wants notification of every relevant solicitation across a state rather than checking dozens of agency websitesnot Tenable Nessus
  • A state cooperative wanting a single regional portal so suppliers register once for many agenciesnot Tenable Nessus
  • An agency required to demonstrate outreach to certified diverse suppliers on every solicitationnot Tenable Nessus

Tenable Nessus

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

Where each one falls short

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

Bidnet Direct

  • Suppliers pay for aggregation, not access: the same solicitations are generally published free on individual agency and state portals, so the subscription is only worth it if searching manually costs more than the fee.
  • Supplier pricing is not published and varies by geography and category breadth, which makes it difficult for a small contractor to judge value before a sales conversation.
  • Category matching produces a high volume of irrelevant alerts for suppliers whose work does not map neatly onto procurement commodity codes, so the notification stream needs constant tuning.
  • Bidnet is now one brand inside SOVRA, which divested six business units in 2025 under new private equity ownership, so portfolio priorities can change independently of any individual product's customers.
  • For agencies it is a publication and notification network rather than a sourcing system: bid evaluation, scoring and contract management need a separate tool.

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

Bidnet Direct

On request
  • Supplier subscription$undefined/year
    • Matched opportunity notifications
    • Access to regional purchasing group solicitations
    • Priced by geographic and category coverage
  • Agency participation$undefined/year
    • Solicitation publication and vendor registry
    • Free or low cost to participating public agencies
    • Supplier diversity reporting

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 Bidnet Direct if

  • You need regional purchasing groups.
  • You also want free agency publication.
Bidnet Direct 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 Bidnet Direct or Tenable Nessus better?
Neither clearly leads. Bidnet Direct 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, Bidnet Direct or Tenable Nessus?
Tenable Nessus has a free tier; the other does not. Paid plans start at On request for Bidnet Direct and Free for Tenable Nessus.
Does Bidnet Direct or Tenable Nessus run on more platforms?
Bidnet Direct runs on Web. 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. Bidnet Direct starts at On request.
What is Bidnet Direct best used for?
Bidnet Direct is most often used for a small municipal purchasing department that needs competitive responses without building or paying for its own bid portal, a contractor that wants notification of every relevant solicitation across a state rather than checking dozens of agency websites, a state cooperative wanting a single regional portal so suppliers register once for many agencies, an agency required to demonstrate outreach to certified diverse suppliers on every solicitation. Of those, a small municipal purchasing department that needs competitive responses without building or paying for its own bid portal and a contractor that wants notification of every relevant solicitation across a state rather than checking dozens of agency websites are not what Tenable Nessus is typically brought in for.
What can Bidnet Direct do that Tenable Nessus cannot?
Bidnet Direct covers Regional purchasing groups, Free agency publication, Supplier notification, Vendor registration. Tenable Nessus covers Network scanning, Vulnerability detection, Configuration assessment, Malware detection.

Answered from the vendors’ own pages

Bidnet Direct: Do government agencies pay?

Generally not, or very little. The network is funded by supplier subscriptions, which is why agencies get an existing supplier pool without paying for it.

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
Bidnet Direct: Is it worth it for a supplier?

Only if aggregation saves you more than it costs. The solicitations are public and available free elsewhere; you are buying alerting and search across many agencies at once.

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
Bidnet Direct: Who owns it now?

SOVRA, the rebranded procurement business of mdf commerce, which was acquired by KKR. Bidnet Direct remains a named product within that portfolio.

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
Bidnet Direct: Does it evaluate bids?

No. It publishes and distributes. Scoring, evaluation and contract management require a sourcing platform.

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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