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Cybersecurity · head to head

Sigstore vs Warp

Sigstore logo

Sigstore

Cybersecurity

Free public signing and transparency infrastructure for open source artifacts

From
Free
Free plan
Yes
Full reviewWebsite
Warp logo

Warp

Developer Tools

The terminal reimagined with AI and modern features

From
Free
Free plan
Yes
Full reviewWebsite

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.; Warp limited cloud agents access on free tier
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Sigstore and Warp actually diverge.

Attributes where Sigstore and Warp differ
AttributeSigstoreWarp
Pricing modelOpen source, public instance free to useUnknown
PlatformsWeb, Linux, macOS, Windows, Self-hostedmacOS, Windows, Linux
CategoryCybersecurityDeveloper Tools
FoundedUnknown2020

Identical on both: starting price (Free), free tier (Yes), 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 Sigstore

  • Fulcio
  • Rekor
  • Keyless signing
  • Multi-language clients
  • Timestamp authority
  • Neutral governance

Only in Warp

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

Warp

  • Modern terminal environment for developersnot Sigstore
  • AI-assisted command execution with multiple LLM providersnot Sigstore
  • Multi-agent orchestration and codebase indexingnot Sigstore
  • Agentic development workflowsnot 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.

Warp

  • Limited cloud agents access on free tier
  • Limited collaboration features on free tier
  • Limited cloud conversation storage on free tier
  • IME input not properly handled on macOS (discarded during command or Agent output)
  • Terminal zoom functionality does not properly resize grid in TUI applications, causing misaligned rendering
  • Multi-language (i18n) support missing as of documentation
  • Requires macOS 10.14 or later (excludes older Mac hardware)
  • Requires Windows 10 build 1903 or later (excludes pre-build 1903 systems)
  • Linux requires glibc 2.31 or higher and GPU support (OpenGL ES 3.0+ or Vulkan) for rendering

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

Warp

Free

No published plan breakdown. See the Warp review.

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 Warp if

  • You want to start without paying.
  • You work on macOS, Windows, Linux.
Warp review

Questions people ask

Is Sigstore or Warp better?
Neither clearly leads. Sigstore starts at Free and Warp at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Sigstore or Warp?
Sigstore starts at Free and Warp at Free.
Does Sigstore or Warp run on more platforms?
Sigstore runs on Web, Linux, macOS, Windows, Self-hosted. Warp runs on macOS, Windows, Linux.
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 Warp is typically brought in for.
What can Sigstore do that Warp 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.

Warp: What is the pricing model?

Usage-based, priced per agent run. Qualifying orgs get $10k of factory usage during closed early access.

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.

Warp: Where does our data live?

Data lives wherever you choose - Warp's cloud, or fully self-hosted inside your own VPC, under your existing retention and compliance rules.

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.

Warp: What is included in the free trial?

Get up to $10,000 in free factory usage during early access.

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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