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Developer Tools · head to head

Azure DevOps vs Cosign

Azure DevOps logo

Azure DevOps

Developer Tools

Plan smarter, collaborate better, and ship faster

From
Free
Free plan
Yes
Full reviewWebsite
Cosign logo

Cosign

Cybersecurity

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

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Azure DevOps first 5 users free applies to Basic plan only; Test Plans users are not included in free tier; 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.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Azure DevOps and Cosign actually diverge.

Attributes where Azure DevOps and Cosign differ
AttributeAzure DevOpsCosign
Pricing modelmixedOpen source, no licence fee
PlatformsWebmacOS, Linux, Windows, Docker
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 Azure DevOps

Nothing recorded that Cosign does not also cover.

Only in Cosign

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

What people use each for

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

Azure DevOps

  • CI/CD pipelines and build automation for software development teamsnot Cosign
  • Source code repository management and version controlnot Cosign
  • Test planning and tracking for QA teamsnot Cosign
  • Artifact storage for packages and binariesnot Cosign

Cosign

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

Where each one falls short

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

Azure DevOps

  • First 5 users free applies to Basic plan only; Test Plans users are not included in free tier
  • Storage pricing increases per-GiB cost as volumes grow, with no volume discount threshold below $0.25

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.

Pricing, plan by plan

Azure DevOps

Free
  • Basic$6/month per user
    • First 5 users free
    • Additional users $6/user/month
    • Pipelines (free tier)
  • Basic + Test Plans$52/month per user
    • All Basic features
    • Test planning, tracking, and execution
  • Azure Pipelines CI/CD - Microsoft-hosted$40/month per additional parallel job
    • 1 free parallel job with 1,800 minutes per month
    • Additional jobs at $40/month each
  • Azure Artifacts Storage$2/month per GiB
    • First 2 GiB free
    • 2-10 GiB: $2/GiB
    • 10-100 GiB: $1/GiB

Cosign

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

Which should you pick?

Choose Azure DevOps if

  • You want to start without paying.
Azure DevOps review

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

Questions people ask

Is Azure DevOps or Cosign better?
Neither clearly leads. Azure DevOps starts at Free and Cosign at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Azure DevOps or Cosign?
Azure DevOps starts at Free and Cosign at Free.
Does Azure DevOps or Cosign run on more platforms?
Azure DevOps runs on Web. Cosign runs on macOS, Linux, Windows, Docker.
Can I use Azure DevOps for free?
Both have a free tier, so you can try either at no cost before committing.
What is Azure DevOps best used for?
Azure DevOps is most often used for ci/cd pipelines and build automation for software development teams, source code repository management and version control, test planning and tracking for qa teams, artifact storage for packages and binaries. Of those, ci/cd pipelines and build automation for software development teams and source code repository management and version control are not what Cosign is typically brought in for.
What can Azure DevOps do that Cosign cannot?
Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations.

Answered from the vendors’ own pages

Azure DevOps: How much does Azure DevOps cost?

Azure DevOps Basic plan is $6 per user per month after the first 5 users are free. Basic + Test Plans tier costs $52 per user per month. Azure Pipelines add-on for extra parallel jobs costs $40 per job for Microsoft-hosted runners and $15 per job for self-hosted runners.

Source
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.

Azure DevOps: Is there a free tier for Azure DevOps?

Yes, Azure DevOps includes 5 free users on the Basic plan. Additional free allocations include 1,800 free minutes per month on Azure Pipelines with a free parallel job, 2 GiB free storage on Azure Artifacts, and free access for Visual Studio subscribers and Stakeholders with limited functionality.

Source
Cosign: Is signing alone enough?

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

Azure DevOps: What does the Basic + Test Plans tier add to Azure DevOps?

The Basic + Test Plans tier adds test planning and execution capabilities, browser-based testing, and centralized reporting features. This tier costs $52 per user per month compared to $6 per user for the Basic plan.

Source
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.

Azure DevOps: How is Azure Artifacts priced?

Azure Artifacts provides 2 GiB of free storage, then charges $2 per GiB for 2-10 GiB, $1 per GiB for 10-100 GiB, $0.50 per GiB for 100-1,000 GiB, and $0.25 per GiB for over 1,000 GiB.

Source
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.

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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