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Government · head to head

DemandStar vs OWASP ZAP

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
OWASP ZAP logo

OWASP ZAP

Cybersecurity

Free, open-source web application scanner and intercepting proxy, now governed by the Software Security Project.

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.; OWASP ZAP authenticated scanning of modern single-page applications is the hard part and ZAP makes you build it by hand: session handling, token refresh and login scripts are configured per application, and a misconfigured session means the scanner logs itself out and reports a clean result for pages it never reached.
  • They diverge on capability: DemandStar covers Free for agencies, OWASP ZAP covers Intercepting proxy.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which DemandStar and OWASP ZAP actually diverge.

Attributes where DemandStar and OWASP ZAP differ
AttributeDemandStarOWASP ZAP
Pricing modelFree for agencies, per year by geographic coverage for suppliersfree
PlatformsWebDesktop, Cli, Api
CategoryGovernmentCybersecurity
FoundedUnknown2001

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 OWASP ZAP

  • Intercepting proxy
  • Passive scanner
  • Active scanner
  • AJAX spider
  • Automation Framework
  • Headless daemon and REST API
  • Docker images
  • Add-on marketplace

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 OWASP ZAP
  • A contractor who works in three adjacent counties and wants notifications only for that footprintnot OWASP ZAP
  • An agency needing sealed electronic bid submission to replace paper deliveries to the clerknot OWASP ZAP
  • A supplier testing whether public sector work is viable before committing to a national subscriptionnot OWASP ZAP

OWASP ZAP

  • Adding a baseline security scan to every application's pipeline where per-target commercial licensing would limit coverage to a handfulnot DemandStar
  • Manual penetration testing that needs an intercepting proxy, request replay and fuzzing without a paid licence per testernot DemandStar
  • Teaching developers what an attack against their own endpoint looks like, using a tool they can install themselvesnot DemandStar
  • Pre-release regression scanning of an internal application that would never justify a commercial DAST subscriptionnot 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.

OWASP ZAP

  • Authenticated scanning of modern single-page applications is the hard part and ZAP makes you build it by hand: session handling, token refresh and login scripts are configured per application, and a misconfigured session means the scanner logs itself out and reports a clean result for pages it never reached.
  • There is no support contract in the product, so when a scan breaks the day before a release the escalation path is a GitHub issue and a community chat, which is not an answer that satisfies a delivery manager or an auditor who wants a named responsible party.
  • Active scanning sends genuine attack traffic, so it can create records, trigger emails, exhaust rate limits or destabilise a fragile environment, and pointing it at production without prior agreement produces an incident rather than a test result.
  • Output needs triage: passive rules generate large volumes of low-severity informational findings about headers and cookie flags that bury the few results that matter, and a team without someone tuning the rule set stops reading the report within a few sprints.
  • As a dynamic scanner it can only test what it can reach, so authorisation flaws between accounts, business logic abuse and anything behind an undiscovered endpoint go unreported, and a passing ZAP scan is evidence of nothing more than the absence of the classes of bug it looks for.

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

OWASP ZAP

Free
  • Free & Open SourceFree
    • Full functionality
    • Active & passive scanning
    • Spider

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 OWASP ZAP if

  • You need intercepting proxy.
  • You want to start without paying.
  • You work on Desktop, Cli, Api.
  • You also want passive scanner.
OWASP ZAP review

Questions people ask

Is DemandStar or OWASP ZAP better?
Neither clearly leads. DemandStar starts at Free and OWASP ZAP at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, DemandStar or OWASP ZAP?
DemandStar starts at Free and OWASP ZAP at Free.
Does DemandStar or OWASP ZAP run on more platforms?
DemandStar runs on Web. OWASP ZAP runs on Desktop, Cli, Api.
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 OWASP ZAP is typically brought in for.
What can DemandStar do that OWASP ZAP cannot?
DemandStar covers Free for agencies, Commodity code matching, eBidding, Plan holder lists. OWASP ZAP covers Intercepting proxy, Passive scanner, Active scanner, AJAX spider.

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.

OWASP ZAP: Is it still called OWASP ZAP?

The project left OWASP in August 2024 and is now governed by the Software Security Project, with core development sponsored by Checkmarx. The tool is now just ZAP, though most existing documentation, courses and search results still use the OWASP name.

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.

OWASP ZAP: Is it free for commercial use?

Yes. It is Apache 2.0 licensed, with no per-application, per-scan or per-user cost, and it can be used and modified commercially without a licence agreement.

DemandStar: Who owns DemandStar?

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

OWASP ZAP: Can it replace a penetration test?

No. It automates checks for known vulnerability classes against endpoints it can reach. It does not reason about business logic, chain findings into an attack, or test authorisation between accounts, which is most of what a tester actually does.

DemandStar: Does it cover every agency?

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

OWASP ZAP: Does it run in CI?

Yes, through the official Docker images and the Automation Framework, which defines scan jobs in YAML so configuration lives in the repository. A baseline passive scan is the usual starting point because it is fast and non-intrusive.

OWASP ZAP: How does it compare to Burp Suite?

Burp Suite Professional is the more polished manual testing tool and has a stronger scanner and extension ecosystem, but it is licensed per tester and Burp Suite Enterprise per target. ZAP is the better fit where cost per target is the binding constraint; many teams use both.

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