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Developer Tools · head to head

HCP Terraform vs Sigstore

HCP Terraform logo

HCP Terraform

Developer Tools

Infrastructure as code provisioning and management, formerly Terraform Cloud

From
Free
Free plan
Yes
Full reviewWebsite
Sigstore logo

Sigstore

Cybersecurity

Free public signing and transparency infrastructure for open source artifacts

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: HCP Terraform legacy free version deprecated; no current freemium tier; 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.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which HCP Terraform and Sigstore actually diverge.

Attributes where HCP Terraform and Sigstore differ
AttributeHCP TerraformSigstore
Pricing modelusage-basedOpen source, public instance free to use
PlatformsWebWeb, Linux, macOS, Windows, Self-hosted
CategoryDeveloper ToolsCybersecurity

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 HCP Terraform

Nothing recorded that Sigstore does not also cover.

Only in Sigstore

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

What people use each for

The jobs each tool is most often brought in to do.

HCP Terraform

  • Infrastructure as Code managementnot Sigstore
  • Cloud resource provisioningnot Sigstore

Sigstore

  • Open source projects signing releases without running a certificate authoritynot HCP Terraform
  • Organisations meeting a signed-artifact requirement without buying a signing productnot HCP Terraform
  • Publishing provenance that a consumer can verify independently of younot HCP Terraform
  • Self-hosting the same components where a public log is unacceptablenot HCP Terraform

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

HCP Terraform

  • Legacy free version deprecated; no current freemium tier
  • New users receive $500 credit but still require usage to continue service
  • Terraform Enterprise requires custom pricing

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.

Pricing, plan by plan

HCP Terraform

Free
  • Essentials$0.1/month
    • Per resource pricing
    • Remote state storage
    • VCS connection
  • Standard$0.47/month
    • Per resource pricing
    • Essentials features plus unlimited modules
    • Module deprecation
  • Premium$0.99/month
    • Per resource pricing
    • Standard features plus module revocation
    • Waypoint actions

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

Which should you pick?

Choose HCP Terraform if

  • You want to start without paying.
HCP Terraform review

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

Questions people ask

Is HCP Terraform or Sigstore better?
Neither clearly leads. HCP Terraform starts at Free and Sigstore at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, HCP Terraform or Sigstore?
HCP Terraform starts at Free and Sigstore at Free.
Does HCP Terraform or Sigstore run on more platforms?
HCP Terraform runs on Web. Sigstore runs on Web, Linux, macOS, Windows, Self-hosted.
Can I use HCP Terraform for free?
Both have a free tier, so you can try either at no cost before committing.
What is HCP Terraform best used for?
HCP Terraform is most often used for infrastructure as code management, cloud resource provisioning. Of those, infrastructure as code management and cloud resource provisioning are not what Sigstore is typically brought in for.
What can HCP Terraform do that Sigstore cannot?
Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients.

Answered from the vendors’ own pages

HCP Terraform: How much does HCP Terraform cost?

HCP Terraform uses per-resource pricing starting at $0.10/month/resource for Essentials, $0.47/month/resource for Standard, and $0.99/month/resource for Premium.

Source
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.

HCP Terraform: Does HCP Terraform offer a free tier?

No, the legacy free version has been deprecated. However, new users receive $500 credit to try the service.

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.

HCP Terraform: What does the Standard plan include?

Standard plan at $0.47/month/resource includes unlimited modules, module deprecation, team notifications, no-code provisioning, and Waypoint templates.

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.

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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