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Cybersecurity · head to head

Cosign vs JetBrains Rider

Cosign logo

Cosign

Cybersecurity

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

From
Free
Free plan
Yes
Full reviewWebsite
JetBrains Rider logo

JetBrains Rider

Developer Tools

Cross-platform .NET IDE from JetBrains for C#, F#, VB.NET and Unity

From
$18.25/month
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.; JetBrains Rider requires a paid subscription with no permanently free commercial tier.
  • They diverge on capability: Cosign covers Keyless signing, JetBrains Rider covers Cross-platform .NET Development.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cosign and JetBrains Rider actually diverge.

Attributes where Cosign and JetBrains Rider differ
AttributeCosignJetBrains Rider
Starting priceFree$18.25/month
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsmacOS, Linux, Windows, Dockerwindows, mac, linux
CategoryCybersecurityDeveloper Tools
FoundedUnknown2000

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 JetBrains Rider

  • Cross-platform .NET Development
  • ReSharper-powered Code Analysis
  • Integrated Debugger and Profiler
  • Version Control Integration
  • Unity Support

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 JetBrains Rider
  • Attaching a signed bill of materials to a release so consumers can verify its provenancenot JetBrains Rider
  • Meeting a customer or regulatory requirement for signed artifactsnot JetBrains Rider
  • Verifying third-party images before they enter an internal registrynot JetBrains Rider

JetBrains Rider

  • Cross-platform .NET and ASP.NET Core developmentnot Cosign
  • Unity game development and debuggingnot Cosign
  • Large-scale C# refactoring with ReSharper-grade analysisnot Cosign
  • Teams standardizing on JetBrains tooling across languagesnot 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.

JetBrains Rider

  • Requires a paid subscription with no permanently free commercial tier.
  • Heavier resource usage than lightweight editors like VS Code for small projects.
  • Some advanced features overlap with a separate ReSharper Visual Studio plugin, causing licensing confusion.
  • First-year pricing increased in late 2025, raising the cost of entry versus prior years.

Pricing, plan by plan

Cosign

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

JetBrains Rider

$18.25/month
  • Individual - Year 1$219/year
    • Full Rider IDE license
    • Free minor and major updates during subscription
  • Individual - Year 2$175/year
    • Continuity discount after first year
  • Individual - Year 3+$131/year
    • Further continuity discount from third year onward

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 JetBrains Rider if

  • You need cross-platform .net development.
  • You work on windows, mac, linux.
  • You also want resharper-powered code analysis.
JetBrains Rider review

Questions people ask

Is Cosign or JetBrains Rider better?
Neither clearly leads. Cosign starts at Free and JetBrains Rider at $18.25/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cosign or JetBrains Rider?
Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and $18.25/month for JetBrains Rider.
Does Cosign or JetBrains Rider run on more platforms?
Cosign runs on macOS, Linux, Windows, Docker. JetBrains Rider runs on windows, mac, linux.
Can I use Cosign for free?
Yes. Cosign has a free tier, so you can try it without paying. JetBrains Rider starts at $18.25/month.
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 JetBrains Rider is typically brought in for.
What can Cosign do that JetBrains Rider cannot?
Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. JetBrains Rider covers Cross-platform .NET Development, ReSharper-powered Code Analysis, Integrated Debugger and Profiler, Version Control Integration.

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.

JetBrains Rider: Does Rider have a free version?

JetBrains offers a free non-commercial license for Rider for personal, non-commercial use, alongside paid commercial subscriptions with continuity discounts after the first year.

Source
Cosign: Is signing alone enough?

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

JetBrains Rider: What counts as non-commercial use under the free license?

Learning, open-source contributions without commercial benefit, content creation like monetized tutorials, and hobby projects qualify; any paid work or commercial release does not.

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.

JetBrains Rider: Does the free non-commercial license include all Rider features?

Yes, it is a full-featured IDE identical to the paid version, with one exception: Code With Me is limited to the Community tier instead of the premium tier.

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.

JetBrains Rider: How often does the non-commercial license renew?

It issues a one-year license that renews automatically each year, provided Rider was opened at least once during the preceding six months.

Source
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.

JetBrains Rider: What support do non-commercial license holders get?

Non-commercial users get community forums and public bug trackers rather than private support tickets, which are reserved for paid subscribers.

Source
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