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Cybersecurity · head to head

Sigstore vs Springbrook Software

Sigstore logo

Sigstore

Cybersecurity

Free public signing and transparency infrastructure for open source artifacts

From
Free
Free plan
Yes
Full reviewWebsite
Springbrook Software logo

Springbrook Software

Government

Cloud ERP built only for small and mid-sized local governments and utility districts

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Sigstore has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; Springbrook Software nothing is publicly priced, and public sector quotes bundle licence, implementation and conversion so tightly that comparing two vendors requires a formal procurement.
  • They diverge on capability: Sigstore covers Fulcio, Springbrook Software covers Cirrus cloud platform.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Sigstore and Springbrook Software actually diverge.

Attributes where Sigstore and Springbrook Software differ
AttributeSigstoreSpringbrook Software
Starting priceFreeOn request
Pricing modelOpen source, public instance free to usequote
Free tierYesNo
PlatformsWeb, Linux, macOS, Windows, Self-hostedWeb
CategoryCybersecurityGovernment

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 Sigstore

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

Only in Springbrook Software

  • Cirrus cloud platform
  • Fund accounting
  • Utility billing
  • Payroll and human resources
  • Cashless payments
  • Permitting and land management

What people use each for

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

Sigstore

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

Springbrook Software

  • A city of a few thousand residents retiring an on-premises finance server nobody on staff can maintainnot Sigstore
  • A water and sewer district needing meter-based utility billing tied directly to the general ledgernot Sigstore
  • A town that must produce GASB-compliant annual financial reports without a full-time systems accountantnot Sigstore
  • Adding online resident payment for utility bills and licences without integrating a third-party gateway by handnot Sigstore

Where each one falls short

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

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.

Springbrook Software

  • Nothing is publicly priced, and public sector quotes bundle licence, implementation and conversion so tightly that comparing two vendors requires a formal procurement.
  • It is scoped for small and mid-sized agencies, so grant accounting, capital project tracking and human resources depth fall short for larger cities.
  • Data conversion from a legacy municipal system is the largest risk and cost in the project, and historical utility billing data in particular frequently converts badly.
  • The integration list is short compared with entrenched public sector vendors, so agencies already committed to a large incumbent ecosystem will have gaps to bridge.
  • Being cloud-native means the agency cannot defer upgrades, which is an advantage for security but removes control over timing from finance teams working to a fiscal calendar.

Pricing, plan by plan

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

Springbrook Software

On request
  • Springbrook Cirrus$undefined/year
    • Cloud ERP for local government
    • Priced by population, module selection and user count
    • Implementation, data conversion and training quoted separately

Which should you pick?

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

Choose Springbrook Software if

  • You need cirrus cloud platform.
  • You also want fund accounting.
Springbrook Software review

Questions people ask

Is Sigstore or Springbrook Software better?
Neither clearly leads. Sigstore starts at Free and Springbrook Software at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Sigstore or Springbrook Software?
Sigstore has a free tier; the other does not. Paid plans start at Free for Sigstore and On request for Springbrook Software.
Does Sigstore or Springbrook Software run on more platforms?
Sigstore runs on Web, Linux, macOS, Windows, Self-hosted. Springbrook Software runs on Web.
Can I use Sigstore for free?
Yes. Sigstore has a free tier, so you can try it without paying. Springbrook Software starts at On request.
What is Sigstore best used for?
Sigstore is most often used for open source projects signing releases without running a certificate authority, organisations meeting a signed-artifact requirement without buying a signing product, publishing provenance that a consumer can verify independently of you, self-hosting the same components where a public log is unacceptable. Of those, open source projects signing releases without running a certificate authority and organisations meeting a signed-artifact requirement without buying a signing product are not what Springbrook Software is typically brought in for.
What can Sigstore do that Springbrook Software cannot?
Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients. Springbrook Software covers Cirrus cloud platform, Fund accounting, Utility billing, Payroll and human resources.

Answered from the vendors’ own pages

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.

Springbrook Software: Who is Springbrook for?

Small and mid-sized cities, towns, water and sewer agencies and special districts, not counties or states.

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.

Springbrook Software: Is Cirrus really cloud-native?

Yes, it is a multi-tenant rebuild rather than a hosted version of the older client-server product, which is the main reason agencies switch to it.

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.

Springbrook Software: Is pricing published?

No. Local government ERP is quoted through procurement, bundling licence, implementation and data conversion.

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.

Springbrook Software: What is the hardest part of implementation?

Converting historical data, particularly utility billing history, from the outgoing system.

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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