Cybersecurity · head to head
Sigstore vs Splunk Enterprise Security
Sigstore
Cybersecurity
Free public signing and transparency infrastructure for open source artifacts
- From
- Free
- Rated
- -
Splunk Enterprise Security
Cybersecurity
The platform for operational intelligence
- From
- On request
- Rated
- -
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.; Splunk Enterprise Security splunk Enterprise Security is licensed separately from the Splunk platform, so a SIEM deployment needs both
- They diverge on capability: Sigstore covers Fulcio, Splunk Enterprise Security covers Security monitoring.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Sigstore and Splunk Enterprise Security actually diverge.
| Attribute | Sigstore | Splunk Enterprise Security |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | Open source, public instance free to use | subscription |
| Free tier | Yes | No |
| Platforms | Web, Linux, macOS, Windows, Self-hosted | Web, Api |
| Founded | Unknown | 2003 |
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 Splunk Enterprise Security
- Security monitoring
- Incident review
- Risk-based alerting
- Threat intelligence
- Investigation workbench
- MITRE ATT&CK mapping
- Automated response
- Compliance reporting
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 Splunk Enterprise Security
- Organisations meeting a signed-artifact requirement without buying a signing productnot Splunk Enterprise Security
- Publishing provenance that a consumer can verify independently of younot Splunk Enterprise Security
- Self-hosting the same components where a public log is unacceptablenot Splunk Enterprise Security
Splunk Enterprise Security
- Running a security operations centre on Splunk indexed log datanot Sigstore
- Correlation searches, risk based alerting and incident investigationnot Sigstore
- Compliance reporting from pooled security telemetrynot 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.
Splunk Enterprise Security
- Splunk Enterprise Security is licensed separately from the Splunk platform, so a SIEM deployment needs both
- Splunk publishes no rate for Enterprise Security and directs buyers to contact a pricing expert
- UEBA, SOAR and automated threat analysis require the Premier edition rather than Essentials
- The platform underneath can be billed by ingest volume, workload or activity, so the total cost depends on a pricing model chosen at contract time rather than a list price
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
Splunk Enterprise Security
On request- Workload PricingFree
- Pay per compute
- Flexible scaling
- All features
- Ingest PricingFree
- Pay per GB ingested
- Predictable costs
- All features
- Entity PricingFree
- Pay per monitored entity
- Security focused
- All features
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.
Choose Splunk Enterprise Security if
- You need security monitoring.
- You work on Web, Api.
- You also want incident review.
Questions people ask
- Is Sigstore or Splunk Enterprise Security better?
- Neither clearly leads. Sigstore starts at Free and Splunk Enterprise Security at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Sigstore or Splunk Enterprise Security?
- Sigstore has a free tier; the other does not. Paid plans start at Free for Sigstore and On request for Splunk Enterprise Security.
- Does Sigstore or Splunk Enterprise Security run on more platforms?
- Sigstore runs on Web, Linux, macOS, Windows, Self-hosted. Splunk Enterprise Security runs on Web, Api.
- Can I use Sigstore for free?
- Yes. Sigstore has a free tier, so you can try it without paying. Splunk Enterprise Security 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 Splunk Enterprise Security is typically brought in for.
- What can Sigstore do that Splunk Enterprise Security cannot?
- Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients. Splunk Enterprise Security covers Security monitoring, Incident review, Risk-based alerting, Threat intelligence.
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.
Splunk Enterprise Security: How much does Splunk Enterprise Security cost?
Splunk Enterprise Security pricing is not published. The product is available in Essentials Edition with threat detection, investigation, and response capabilities, and Premier Edition with UEBA, SOAR, and Automated Threat Analysis. Customers must contact Splunk sales for pricing quotes on either edition.
SourceSigstore: 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.
Splunk Enterprise Security: What editions of Splunk Enterprise Security are available?
Splunk Enterprise Security offers Essentials Edition with threat detection, investigation, and response capabilities, and Premier Edition which adds UEBA (User and Entity Behavior Analytics), SOAR (Security Orchestration, Automation and Response), and Automated Threat Analysis.
SourceSigstore: 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.
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.
Related pages
More on Splunk Enterprise Security
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