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Cybersecurity · head to head

Sigstore vs Vanta

Sigstore logo

Sigstore

Cybersecurity

Free public signing and transparency infrastructure for open source artifacts

From
Free
Rated
-
Full reviewWebsite
Vanta logo

Vanta

Cybersecurity

Compliance automation platform for SOC 2, ISO 27001 and similar frameworks.

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.; Vanta no published pricing for any tier; all plans require requesting a demo and contacting sales
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Sigstore and Vanta actually diverge.

Attributes where Sigstore and Vanta differ
AttributeSigstoreVanta
Starting priceFreeOn request
Pricing modelOpen source, public instance free to usesubscription
Free tierYesNo
PlatformsWeb, Linux, macOS, Windows, Self-hostedWeb, API

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 Vanta

Nothing recorded that Sigstore does not also cover.

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

Vanta

  • SaaS and fintech companies needing rapid SOC 2 certification for enterprise salesnot Sigstore
  • Healthcare organisations automating HIPAA compliance managementnot Sigstore
  • European companies managing GDPR and privacy compliancenot Sigstore
  • Organisations implementing ISO 27001 and other security standardsnot Sigstore
  • Companies conducting vendor security assessments and managing third-party risknot 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.

Vanta

  • No published pricing for any tier; all plans require requesting a demo and contacting sales
  • Essentials tier limited to one compliance framework; organisations needing multiple frameworks must upgrade to higher tiers
  • Plus and Professional tiers feature unclear differentiation; specific pricing and included questionnaires not published
  • Enterprise pricing fully custom; no transparency on costs or what features are included
  • AI questionnaire automation capped at 25 annually in Plus tier, only 144 annually in Professional tier

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

Vanta

On request
  • Essentials$undefined/variable
    • One compliance framework
    • Vanta AI Agent features
    • Automated evidence collection
  • Plus$undefined/variable
    • All Essentials features
    • Enhanced AI Agent capabilities
    • AI-powered questionnaire automation (25 annually)
  • Professional$undefined/variable
    • All Plus features
    • 144 questionnaires annually (marked 'Most Popular')
    • Risk management tools
  • Enterprise$undefined/variable
    • Fully customisable package
    • Flexible, scalable, advanced compliance
    • Tailored to sophisticated GRC requirements

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 Vanta if

  • You work on Web, API.
Vanta review

Questions people ask

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

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.

Vanta: How many compliance frameworks does Vanta support?

Vanta supports 35+ compliance frameworks including SOC 2, ISO 27001, HIPAA, GDPR and custom frameworks.

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.

Vanta: Does Vanta automate questionnaires?

Yes. Vanta's AI Agent can automate questionnaire completion, with the number of annually supported questionnaires varying by plan (25 in Plus tier, 144 in Professional tier).

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.

Vanta: How many integrations does Vanta support?

Vanta integrates with 300+ pre-built system connections and supports over 90% automation of compliance tasks through these integrations.

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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