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Government · head to head

IAPro vs Sigstore

IAPro logo

IAPro

Government

Internal Affairs Case Management

From
$500/month
Free plan
No
Full reviewWebsite
Sigstore logo

Sigstore

Cybersecurity

Free public signing and transparency infrastructure for open source artifacts

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Sigstore has a free tier, so it costs nothing to try first.
  • Each has a real cost: IAPro a public university's procurement documentation for IAPro (CI Technologies, acquired by Versaterm Public Safety in 2023) states the software is sold as an unlimited-use license covering all concurrent users and workstations with no additional or hidden licensing costs, and the first year of annual maintenance is included free; no dollar figure for that license was disclosed in the document, so total cost is not visible without a direct quote.; Sigstore the security model depends on somebody watching the log. The documentation states that compromise of an identity provider or of Fulcio itself is detectable only if third parties monitor the transparency log, the monitoring tool is a community-tier rather than core project, and almost no consumer runs one.
  • They diverge on capability: IAPro covers Case Management, Sigstore covers Fulcio.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which IAPro and Sigstore actually diverge.

Attributes where IAPro and Sigstore differ
AttributeIAProSigstore
Starting price$500/monthFree
Pricing modelsubscriptionOpen source, public instance free to use
Free tierNoYes
PlatformsWeb, DesktopWeb, Linux, macOS, Windows, Self-hosted
CategoryGovernmentCybersecurity
Founded1997Unknown

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 IAPro

  • Case Management
  • Early Warning System
  • Use of Force Tracking
  • Analytics
  • Reporting
  • CAD Systems
  • RMS
  • HR Systems

Only in Sigstore

  • Fulcio
  • Rekor
  • Keyless signing
  • Multi-language clients
  • Timestamp authority
  • Neutral governance

What people use each for

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

IAPro

  • Citizen Servicesnot Sigstore
  • Records Managementnot Sigstore
  • Public Safetynot Sigstore
  • Civic Engagementnot Sigstore

Sigstore

  • Open source projects signing releases without running a certificate authoritynot IAPro
  • Organisations meeting a signed-artifact requirement without buying a signing productnot IAPro
  • Publishing provenance that a consumer can verify independently of younot IAPro
  • Self-hosting the same components where a public log is unacceptablenot IAPro

Where each one falls short

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

IAPro

  • A public university's procurement documentation for IAPro (CI Technologies, acquired by Versaterm Public Safety in 2023) states the software is sold as an unlimited-use license covering all concurrent users and workstations with no additional or hidden licensing costs, and the first year of annual maintenance is included free; no dollar figure for that license was disclosed in the document, so total cost is not visible without a direct quote.

Sigstore

  • The security model depends on somebody watching the log. The documentation states that compromise of an identity provider or of Fulcio itself is detectable only if third parties monitor the transparency log, the monitoring tool is a community-tier rather than core project, and almost no consumer runs one.
  • It is a 99.5 percent objective with no service level agreement, which permits several hours of downtime a month and offers no remedy. A pipeline that signs on every build has taken a hard dependency on a free service with no contract behind it.
  • Log scale is a live engineering problem rather than a theoretical one. The active shard holds billions of entries, the log has already been sharded twice, and sharding version 1 requires stopping traffic, which is why a replacement was built.
  • Ten-minute certificates make trust depend on log availability. Verifying an older signature relies on the log entry proving it was made inside that window, so a lost or unreachable entry can render a valid artifact unverifiable.
  • Migration debt is substantial and ongoing. Version 2 of the log is generally available but not the public default, the signing client has an announced breaking release ahead, some official clients lag the new log format, and a post-quantum migration is named as the next break after that.

Pricing, plan by plan

IAPro

$500/month
  • IAPro$500/month
    • Case Management
    • Early Warning
    • Analytics

Sigstore

Free
  • Public good instanceFree
    • Free to everyone with no contract
    • 99.5 percent availability objective, not an agreement
    • 100KB cap per attestation upload
  • Self-hostedFree
    • Apache-2.0
    • Run your own Fulcio and Rekor
    • Rekor v2 available for self-hosters

Which should you pick?

Choose IAPro if

  • You need case management.
  • You work on Web, Desktop.
  • You also want early warning system.
IAPro review

Choose Sigstore if

  • You need fulcio.
  • You want to start without paying.
  • You work on Web, Linux, macOS, Windows, Self-hosted.
  • You also want rekor.
Sigstore review

Questions people ask

Is IAPro or Sigstore better?
Neither clearly leads. IAPro starts at $500/month and Sigstore at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IAPro or Sigstore?
Sigstore has a free tier; the other does not. Paid plans start at $500/month for IAPro and Free for Sigstore.
Does IAPro or Sigstore run on more platforms?
IAPro runs on Web, Desktop. Sigstore runs on Web, Linux, macOS, Windows, Self-hosted.
Can I use Sigstore for free?
Yes. Sigstore has a free tier, so you can try it without paying. IAPro starts at $500/month.
What is IAPro best used for?
IAPro is most often used for citizen services, records management, public safety, civic engagement. Of those, citizen services and records management are not what Sigstore is typically brought in for.
What can IAPro do that Sigstore cannot?
IAPro covers Case Management, Early Warning System, Use of Force Tracking, Analytics. Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients.

Answered from the vendors’ own pages

IAPro: How much does IAPro cost?

Pricing is not published. IAPro is an enterprise solution for professional standards management with custom pricing based on organizational needs.

Source
Sigstore: Is the public instance really free?

Yes, with no contract and no paid tier. That is also the weakness: a 99.5 percent objective with no agreement, no remedy and support through Slack.

IAPro: Can I try IAPro before committing to a purchase?

No self-serve trial is mentioned. The site directs interested parties to book a consultation with the sales team to discuss evaluation options.

Source
Sigstore: Has the public log moved to Rekor v2?

No. Version 2 reached general availability in October 2025 and self-hosters can use it, but the public instance still defaults to version 1 and the project has said it will for the foreseeable future.

IAPro: How do I request a quote or demo?

Contact Versaterm directly at 613-820-0311, 1-866-729-2947, or use the contact form at their website. They offer consultation booking for enterprise prospects.

Source
Sigstore: Does Sigstore make my dependencies safe?

No, and this is a category error worth avoiding. It tells you who published something. It has no knowledge of what the artifact contains or whether it is vulnerable.

IAPro: What is the typical contract length?

Contract terms are not disclosed on the website. As an enterprise product, terms are negotiated individually during the sales process.

Source
Sigstore: What are the rate limits?

Not published. Only the 100KB cap per attestation upload is documented, so do not design a high-volume pipeline around assumed throughput.

Sigstore: Should we self-host it?

If a public record of every signature is unacceptable, or if a free service with no agreement cannot sit in your build path, then yes. Otherwise the public instance is what most projects use.

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