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Government · head to head

Periscope Holdings vs Sigstore

Periscope Holdings logo

Periscope Holdings

Government

Statewide e-procurement systems and supplier networks for large public agencies

From
On request
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: Periscope Holdings it is scaled and priced for statewide programmes, so a single city or county typically finds both the implementation effort and the cost out of proportion to its needs.; 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: Periscope Holdings covers Sealed bid solicitation, Sigstore covers Fulcio.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Periscope Holdings and Sigstore actually diverge.

Attributes where Periscope Holdings and Sigstore differ
AttributePeriscope HoldingsSigstore
Starting priceOn requestFree
Pricing modelquoteOpen source, public instance free to use
Free tierNoYes
PlatformsWebWeb, Linux, macOS, Windows, Self-hosted
CategoryGovernmentCybersecurity

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 Periscope Holdings

  • Sealed bid solicitation
  • Supplier registration network
  • Contract catalogues
  • Cooperative purchasing
  • Spend and compliance reporting
  • Supplier diversity tracking

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.

Periscope Holdings

  • A state building a central procurement portal serving many agencies and local entitiesnot Sigstore
  • A large agency needing statutory sealed bidding with a public opening recordnot Sigstore
  • A purchasing programme that must report spend and supplier diversity across entitiesnot Sigstore
  • A state wanting local governments to buy from its awarded cooperative contractsnot Sigstore

Sigstore

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

Where each one falls short

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

Periscope Holdings

  • It is scaled and priced for statewide programmes, so a single city or county typically finds both the implementation effort and the cost out of proportion to its needs.
  • The interface reflects the age and regulatory weight of the platform, and suppliers routinely describe registration and bidding as harder than on newer portals, which can suppress bid response.
  • Ownership has changed twice since 2021, from independent to mdf commerce to KKR, so roadmap and support continuity should be written into the contract rather than assumed.
  • Sibling products inside mdf commerce cover adjacent procurement ground, which means an apparently competitive shortlist may contain two products with the same owner.
  • Statewide implementations are multi year projects with heavy configuration and change management, and the professional services cost commonly exceeds the software over the contract term.

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

Periscope Holdings

On request
  • BuySpeed$undefined/year
    • Quoted per programme, scaled to entities served and transaction volume
    • Multi year statewide contracts with implementation priced separately
    • Supplier side registration fees form part of the commercial model on some programmes

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 Periscope Holdings if

  • You need sealed bid solicitation.
  • You also want supplier registration network.
Periscope Holdings 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 Periscope Holdings or Sigstore better?
Neither clearly leads. Periscope Holdings starts at On request and Sigstore at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Periscope Holdings or Sigstore?
Sigstore has a free tier; the other does not. Paid plans start at On request for Periscope Holdings and Free for Sigstore.
Does Periscope Holdings or Sigstore run on more platforms?
Periscope Holdings runs on Web. 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. Periscope Holdings starts at On request.
What is Periscope Holdings best used for?
Periscope Holdings is most often used for a state building a central procurement portal serving many agencies and local entities, a large agency needing statutory sealed bidding with a public opening record, a purchasing programme that must report spend and supplier diversity across entities, a state wanting local governments to buy from its awarded cooperative contracts. Of those, a state building a central procurement portal serving many agencies and local entities and a large agency needing statutory sealed bidding with a public opening record are not what Sigstore is typically brought in for.
What can Periscope Holdings do that Sigstore cannot?
Periscope Holdings covers Sealed bid solicitation, Supplier registration network, Contract catalogues, Cooperative purchasing. Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients.

Answered from the vendors’ own pages

Periscope Holdings: Who owns Periscope Holdings?

mdf commerce acquired it in 2021, and mdf commerce was itself acquired by KKR in 2024.

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.

Periscope Holdings: Is it suitable for a single city?

Usually not. It is built and priced for statewide or very large agency programmes.

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.

Periscope Holdings: What is BuySpeed?

The e-procurement platform behind its statewide deployments, covering solicitation through catalogue ordering and reporting.

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.

Periscope Holdings: Can we see what a state paid?

Yes. State procurement awards are public records and typically disclose the full multi year contract value.

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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