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Cybersecurity · head to head

Sigstore vs Socure

Sigstore logo

Sigstore

Cybersecurity

Free public signing and transparency infrastructure for open source artifacts

From
Free
Rated
-
Full reviewWebsite
Socure logo

Socure

Cybersecurity

Predictive identity verification and fraud scoring for the US market

From
On request
Rated
-
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.; Socure coverage and accuracy depend on US consumer data density, so international expansion means adding a second, document-based vendor rather than scaling the same contract.
  • They diverge on capability: Sigstore covers Fulcio, Socure covers ID+ identity verification.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Sigstore and Socure actually diverge.

Attributes where Sigstore and Socure differ
AttributeSigstoreSocure
Starting priceFreeOn request
Pricing modelOpen source, public instance free to usequote
Free tierYesNo
PlatformsWeb, Linux, macOS, Windows, Self-hostedWeb, iOS, Android

Identical on both: user rating (Not yet rated), category (Cybersecurity).

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 Socure

  • ID+ identity verification
  • Synthetic identity detection
  • Document verification
  • Watchlist screening
  • Consortium signals
  • Reason codes
  • Account intelligence

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 Socure
  • Organisations meeting a signed-artifact requirement without buying a signing productnot Socure
  • Publishing provenance that a consumer can verify independently of younot Socure
  • Self-hosting the same components where a public log is unacceptablenot Socure

Socure

  • A US lender losing money to synthetic identities that pass document verification and thin-file credit checksnot Sigstore
  • A credit union that wants to open accounts without asking applicants to photograph a driving licencenot Sigstore
  • A government benefits programme needing identity assurance for applicants without in-person enrolmentnot Sigstore
  • A fintech that needs auditable reason codes for every decline to support adverse action noticesnot 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.

Socure

  • Coverage and accuracy depend on US consumer data density, so international expansion means adding a second, document-based vendor rather than scaling the same contract.
  • Data-only verification performs worst on thin-file populations, and young, recently arrived or credit-invisible applicants are declined at higher rates, which creates a fair lending exposure a bank must monitor.
  • Pricing is per decision with an annual commitment and is not published, so the cost of a traffic spike or a bot attack on your signup flow lands on your bill.
  • Modules for verification, fraud and compliance are licensed separately, so the shortlist price rarely matches the final contract once screening and document fallback are added.
  • A probabilistic score is harder to defend to an examiner than a documented identification procedure, so US institutions still have to map the score to explicit Customer Identification Programme controls themselves.

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

Socure

On request
  • Socure ID+$undefined/year
    • Priced per identity decision with annual commitment
    • Modules for verification, fraud and compliance priced separately
    • US data coverage strongest, international more limited

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 Socure if

  • You need id+ identity verification.
  • You work on Web, iOS, Android.
  • You also want synthetic identity detection.
Socure review

Questions people ask

Is Sigstore or Socure better?
Neither clearly leads. Sigstore starts at Free and Socure at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Sigstore or Socure?
Sigstore has a free tier; the other does not. Paid plans start at Free for Sigstore and On request for Socure.
Does Sigstore or Socure run on more platforms?
Sigstore runs on Web, Linux, macOS, Windows, Self-hosted. Socure runs on Web, iOS, Android.
Can I use Sigstore for free?
Yes. Sigstore has a free tier, so you can try it without paying. Socure 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 Socure is typically brought in for.
What can Sigstore do that Socure cannot?
Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients. Socure covers ID+ identity verification, Synthetic identity detection, Document verification, Watchlist screening.

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.

Socure: Does Socure work outside the United States?

International coverage exists but the data depth that makes the US product accurate is not replicated everywhere. Most global buyers pair it with a document vendor.

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.

Socure: Can it verify without a document photo?

Yes, that is the core proposition. Document verification is available as a step-up when the data-only score is inconclusive.

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.

Socure: Is pricing published?

No. It is quoted per decision against an annual volume commitment.

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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