Cybersecurity · head to head
Sigstore vs Socket
Sigstore
Cybersecurity
Free public signing and transparency infrastructure for open source artifacts
- From
- Free
- Rated
- -
Socket
Cybersecurity
Supply chain security platform detecting and blocking malicious dependencies
- From
- Free
- Rated
- -
The short version
- 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.; Socket team plan requires minimum 5-developer commitment, expensive for small teams
- They diverge on capability: Sigstore covers Fulcio, Socket covers Malware detection.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Sigstore and Socket actually diverge.
Identical on both: starting price (Free), free tier (Yes), 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 Socket
- Malware detection
- Automatic blocking
- AI behavior analysis
- Reachability analysis
- Slack integration
- SBOM support
- SAML SSO
- GitHub Actions scanning
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 Socket
- Organisations meeting a signed-artifact requirement without buying a signing productnot Socket
- Publishing provenance that a consumer can verify independently of younot Socket
- Self-hosting the same components where a public log is unacceptablenot Socket
Socket
- Blocking zero-day malware attacks in JavaScript dependenciesnot Sigstore
- Managing CVE false positives with precomputed reachability analysisnot Sigstore
- Securing Python and Go supply chains at scalenot Sigstore
- Automating compliance requirements for regulated industriesnot Sigstore
- Real-time threat notifications via Slack integrationnot 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.
Socket
- Team plan requires minimum 5-developer commitment, expensive for small teams
- Business plan $50/dev/month becomes costly for teams exceeding 20 members
- Enterprise pricing requires custom consultation with no transparent pricing
- Free plan limited to individual developers without team collaboration
- Reachability analysis improvement (90% false positive reduction) only on Enterprise
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
Socket
Free- FreeFree
- For individual developers
- Detects 70+ risk types
- Blocks malicious dependencies automatically
- Team$25/month
- Per developer on minimum 5 developers
- Precomputed reachability analysis cuts 60% false positives
- Slack alerts for threats
- Business$50/month
- Per developer on minimum 20 developers
- All Team features
- Compliance integrations with Vanta
- Enterprise$undefined/custom
- Function-level reachability eliminates up to 90% irrelevant CVEs
- Multi-repository system support
- Named account manager
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 Socket if
- You need malware detection.
- You want to start without paying.
- You work on Web, CLI, GitHub.
- You also want automatic blocking.
Questions people ask
- Is Sigstore or Socket better?
- Neither clearly leads. Sigstore starts at Free and Socket at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Sigstore or Socket?
- Sigstore starts at Free and Socket at Free.
- Does Sigstore or Socket run on more platforms?
- Sigstore runs on Web, Linux, macOS, Windows, Self-hosted. Socket runs on Web, CLI, GitHub.
- Can I use Sigstore for free?
- Both have a free tier, so you can try either at no cost before committing.
- 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 Socket is typically brought in for.
- What can Sigstore do that Socket cannot?
- Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients. Socket covers Malware detection, Automatic blocking, AI behavior analysis, Reachability analysis.
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.
Socket: How many zero-day attacks does Socket detect?
Socket detects over 100 zero-day attacks weekly across JavaScript, Python, and Go ecosystems.
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.
Socket: What is precomputed reachability analysis?
Socket's precomputed reachability analysis cuts CVE false positives by 60% automatically on Team plans, and up to 90% on Enterprise plans through function-level 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.
Socket: Is there a discount for annual billing?
Yes. Socket offers a 20% discount for annual commitments across all subscription tiers.
SourceSigstore: 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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