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Cybersecurity · head to head

Cosign vs mySidewalk

Cosign logo

Cosign

Cybersecurity

Signs and verifies container images and artifacts, with or without managing keys

From
Free
Free plan
Yes
Full reviewWebsite
mySidewalk logo

mySidewalk

Government

Community data dashboards for local government and public health, prewired to federal datasets

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Cosign has a free tier, so it costs nothing to try first.
  • Each has a real cost: Cosign keyless signing inherits every weakness of the identity provider behind it. Sigstore’s own threat model states that if an identity provider is compromised, Sigstore will issue certificates to those identities, so a compromised account produces perfectly valid signatures.; mySidewalk it produces analysis and presentation rather than operational change, so the value has to be re argued at every renewal against services with more visible outputs.
  • They diverge on capability: Cosign covers Keyless signing, mySidewalk covers Prewired federal datasets.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cosign and mySidewalk actually diverge.

Attributes where Cosign and mySidewalk differ
AttributeCosignmySidewalk
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsmacOS, Linux, Windows, DockerWeb
CategoryCybersecurityGovernment

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 Cosign

  • Keyless signing
  • Key and KMS signing
  • Registry-native storage
  • In-toto attestations
  • Offline verification
  • Trusted root and signing config

Only in mySidewalk

  • Prewired federal datasets
  • Margin of error handling
  • Custom geographies
  • Published dashboards
  • Local data integration
  • Report generation

What people use each for

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

Cosign

  • Signing container images in a build pipeline without managing long-lived private keysnot mySidewalk
  • Attaching a signed bill of materials to a release so consumers can verify its provenancenot mySidewalk
  • Meeting a customer or regulatory requirement for signed artifactsnot mySidewalk
  • Verifying third-party images before they enter an internal registrynot mySidewalk

mySidewalk

  • A public health department producing a community health needs assessment on deadlinenot Cosign
  • A city applying for federal funding that requires demographic and disparity evidence for a service areanot Cosign
  • An agency that lost its only analyst who understood American Community Survey margins of errornot Cosign
  • A council wanting published neighbourhood indicator dashboards residents can browsenot Cosign

Where each one falls short

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

Cosign

  • Keyless signing inherits every weakness of the identity provider behind it. Sigstore’s own threat model states that if an identity provider is compromised, Sigstore will issue certificates to those identities, so a compromised account produces perfectly valid signatures.
  • A signature proves who signed, never whether they should have. The documentation is explicit that Sigstore cannot determine authorisation, so every consumer must write and maintain their own identity and issuer policy or verification means nothing.
  • Nothing is enforced without an admission controller. Signing changes what you can prove, not what runs, and the official policy controller has a small maintainer base for a component sitting in a cluster admission path.
  • Upgrades break pipelines. Version 3 changed defaults, version 4 is announced as removing legacy functionality and roughly half the command line flags, and two official client libraries still lacked support for the new log format as of mid 2026.
  • Signatures do not expire. An artifact signed before a maintainer account was compromised and one signed after are indistinguishable unless somebody is actively monitoring the transparency log, and almost nobody is.

mySidewalk

  • It produces analysis and presentation rather than operational change, so the value has to be re argued at every renewal against services with more visible outputs.
  • Budget frequently comes from a grant, which means the subscription is exposed when the grant cycle ends rather than being protected as core infrastructure.
  • The prewired datasets are American, so the platform has effectively no value outside United States federal statistical sources.
  • Analytical depth is bounded by what the platform exposes, so an agency with a genuine analyst will hit the ceiling and move to a statistical environment.
  • Small area estimates remain small area estimates, and presenting them as polished dashboards can lend unwarranted confidence to figures whose error bars overlap.

Pricing, plan by plan

Cosign

Free
  • CosignFree
    • Apache-2.0
    • Public Sigstore infrastructure free to use
    • No usage limits published

mySidewalk

On request
  • mySidewalk$undefined/year
    • Quoted annually by agency scope and dataset needs
    • Custom geography and local data integration work priced separately
    • No public price list, though agency contracts are public records

Which should you pick?

Choose Cosign if

  • You need keyless signing.
  • You want to start without paying.
  • You work on macOS, Linux, Windows, Docker.
  • You also want key and kms signing.
Cosign review

Choose mySidewalk if

  • You need prewired federal datasets.
  • You also want margin of error handling.
mySidewalk review

Questions people ask

Is Cosign or mySidewalk better?
Neither clearly leads. Cosign starts at Free and mySidewalk at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cosign or mySidewalk?
Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and On request for mySidewalk.
Does Cosign or mySidewalk run on more platforms?
Cosign runs on macOS, Linux, Windows, Docker. mySidewalk runs on Web.
Can I use Cosign for free?
Yes. Cosign has a free tier, so you can try it without paying. mySidewalk starts at On request.
What is Cosign best used for?
Cosign is most often used for signing container images in a build pipeline without managing long-lived private keys, attaching a signed bill of materials to a release so consumers can verify its provenance, meeting a customer or regulatory requirement for signed artifacts, verifying third-party images before they enter an internal registry. Of those, signing container images in a build pipeline without managing long-lived private keys and attaching a signed bill of materials to a release so consumers can verify its provenance are not what mySidewalk is typically brought in for.
What can Cosign do that mySidewalk cannot?
Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. mySidewalk covers Prewired federal datasets, Margin of error handling, Custom geographies, Published dashboards.

Answered from the vendors’ own pages

Cosign: Does Cosign tell me if an image is vulnerable?

No. It has no vulnerability knowledge whatsoever. It can carry an SBOM as a signed attestation but never reads it. Pair it with a scanner.

mySidewalk: What problem does it actually solve?

Correct use of American Community Survey and federal health data for small geographies, which is difficult and is usually held by one person in an agency.

Cosign: Is signing alone enough?

No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.

mySidewalk: Is it useful outside the United States?

No. Its value is the maintained pipeline into US federal statistical datasets.

Cosign: What does a bare cosign verify actually prove?

Very little. Without a pinned certificate identity and OIDC issuer, it accepts a valid signature from any identity at all.

mySidewalk: Who buys it?

Mostly public health departments and city planning or performance teams, often funded from a grant that requires the evidence it produces.

Cosign: What is the risk of keyless signing?

Your OIDC provider becomes the root of trust. Compromise of that account yields genuine, verifiable signatures, so account security is the control that matters.

mySidewalk: Can we see comparable contract values?

Yes. Agency contracts are public records and appear in council and health board agenda materials.

Cosign: Should we expect breaking changes?

Yes. Version 4 is announced to remove roughly half the flags, and a post-quantum migration is named as a further breaking change after that.

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