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Government · head to head

Azure Government vs Sigstore

Azure Government logo

Azure Government

Government

Trusted Cloud for Government

From
On request
Free plan
No
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

  • Only Sigstore has a free tier, so it costs nothing to try first.
  • Each has a real cost: Azure Government restricted to US government entities, their solution providers and contractors handling government data, with Microsoft validating eligibility first; 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.
  • They diverge on capability: Azure Government covers FedRAMP High Authorized, Sigstore covers Fulcio.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Azure Government and Sigstore actually diverge.

Attributes where Azure Government and Sigstore differ
AttributeAzure GovernmentSigstore
Starting priceOn requestFree
Pricing modelusage-basedOpen source, public instance free to use
Free tierNoYes
PlatformsWeb, Cli, SdkWeb, Linux, macOS, Windows, Self-hosted
CategoryGovernmentCybersecurity
Founded1975Unknown

Identical on both: 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 Azure Government

  • FedRAMP High Authorized
  • DOD IL5 Approved
  • Isolated Datacenters
  • Hybrid Cloud
  • AI & ML Services
  • Microsoft 365
  • Dynamics 365
  • Power Platform

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.

Azure Government

  • Hosting US government workloads in dedicated domestic datacentresnot Sigstore
  • Systems needing FedRAMP High, DoD IL2 to IL5, CJIS or ITAR authorisationnot Sigstore
  • State, local and tribal government cloud servicesnot Sigstore
  • Contractors processing controlled government datanot Sigstore

Sigstore

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

Where each one falls short

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

Azure Government

  • Restricted to US government entities, their solution providers and contractors handling government data, with Microsoft validating eligibility first
  • A narrower service catalogue than commercial Azure
  • New features arrive later than in the commercial regions
  • Pricing is not published and runs through federal contract vehicles such as JWCC, GSA and NASA SEWP

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

Azure Government

On request
  • Pay-as-you-goFree
    • Virtual Machines
    • Azure SQL
    • Storage

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 Azure Government if

  • You need fedramp high authorized.
  • You work on Web, Cli, Sdk.
  • You also want dod il5 approved.
Azure Government 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 Azure Government or Sigstore better?
Neither clearly leads. Azure Government starts at On request and Sigstore at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Azure Government or Sigstore?
Sigstore has a free tier; the other does not. Paid plans start at On request for Azure Government and Free for Sigstore.
Does Azure Government or Sigstore run on more platforms?
Azure Government runs on Web, Cli, Sdk. Sigstore runs on Web, Linux, macOS, Windows, Self-hosted.
Can I use Sigstore for free?
Yes. Sigstore has a free tier, so you can try it without paying. Azure Government starts at On request.
What is Azure Government best used for?
Azure Government is most often used for hosting us government workloads in dedicated domestic datacentres, systems needing fedramp high, dod il2 to il5, cjis or itar authorisation, state, local and tribal government cloud services, contractors processing controlled government data. Of those, hosting us government workloads in dedicated domestic datacentres and systems needing fedramp high, dod il2 to il5, cjis or itar authorisation are not what Sigstore is typically brought in for.
What can Azure Government do that Sigstore cannot?
Azure Government covers FedRAMP High Authorized, DOD IL5 Approved, Isolated Datacenters, Hybrid Cloud. Sigstore covers Fulcio, Rekor, Keyless signing, Multi-language clients.

Answered from the vendors’ own pages

Azure Government: How is Azure Government pricing determined?

Azure pricing follows a pay-as-you-go model where you only pay for services you use. Prices vary by product, region, and usage patterns. Committed use discounts and reserved instances can save up to 65% for compute services.

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.

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.

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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