Cybersecurity · head to head
Cosign vs Nx Cloud
Cosign
Cybersecurity
Signs and verifies container images and artifacts, with or without managing keys
- From
- Free
- Free plan
- Yes
Nx Cloud
Developer Tools
Distributed CI and remote caching for monorepo teams
- From
- Free
- Free plan
- Yes
The short version
- 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.; Nx Cloud requires Nx workspace setup; integration limited to Nx build system
- They diverge on capability: Cosign covers Keyless signing, Nx Cloud covers Nx Replay.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Cosign and Nx Cloud actually diverge.
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 Cosign
- Keyless signing
- Key and KMS signing
- Registry-native storage
- In-toto attestations
- Offline verification
- Trusted root and signing config
Only in Nx Cloud
- Nx Replay
- Nx Agents
- Remote execution
- Advanced analytics
- Conformance rules
- AI-powered recovery
- Multi-repository visibility
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 Nx Cloud
- Attaching a signed bill of materials to a release so consumers can verify its provenancenot Nx Cloud
- Meeting a customer or regulatory requirement for signed artifactsnot Nx Cloud
- Verifying third-party images before they enter an internal registrynot Nx Cloud
Nx Cloud
- Accelerating monorepo CI pipelines with distributed task executionnot Cosign
- Reducing build times through remote caching and incremental buildsnot Cosign
- Scaling development teams across complex multi-package projectsnot Cosign
- Enforcing consistency and standards across monorepo workspacesnot 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.
Nx Cloud
- Requires Nx workspace setup; integration limited to Nx build system
- Free tier restricted to 5 contributors; larger teams require paid plans
- Credits system adds complexity to cost prediction vs flat-rate competitors
- Self-hosted Enterprise deployment requires significant operational overhead
Pricing, plan by plan
Cosign
Free- CosignFree
- Apache-2.0
- Public Sigstore infrastructure free to use
- No usage limits published
Nx Cloud
Free- HobbyFree
- 50,000 monthly credits
- 5 contributors
- 10 concurrent CI connections
- Team$29/month
- Usage-based credits ($29 base plus overage)
- Unlimited contributors
- Remote caching
- Enterprise$undefined/custom
- Complete feature access
- Conformance rules
- Cross-repository visibility
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.
Choose Nx Cloud if
- You need nx replay.
- You want to start without paying.
- You work on Web, CI/CD Systems.
- You also want nx agents.
Questions people ask
- Is Cosign or Nx Cloud better?
- Neither clearly leads. Cosign starts at Free and Nx Cloud at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Cosign or Nx Cloud?
- Cosign starts at Free and Nx Cloud at Free.
- Does Cosign or Nx Cloud run on more platforms?
- Cosign runs on macOS, Linux, Windows, Docker. Nx Cloud runs on Web, CI/CD Systems.
- Can I use Cosign for free?
- Both have a free tier, so you can try either at no cost before committing.
- 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 Nx Cloud is typically brought in for.
- What can Cosign do that Nx Cloud cannot?
- Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. Nx Cloud covers Nx Replay, Nx Agents, Remote execution, Advanced analytics.
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.
Nx Cloud: What is included in the free Hobby plan?
The Hobby plan includes 50,000 monthly credits, support for 5 contributors, 10 concurrent CI connections, and basic analytics at no cost with no credit card required.
SourceCosign: Is signing alone enough?
No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.
Nx Cloud: How are overages charged on the Team plan?
The Team plan starts at $29/month with included credits. Additional credits cost $5.50 per 10,000 credits, extra contributors cost $19 each, and additional CI connections cost $2.25 each.
SourceCosign: 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.
Nx Cloud: Can Nx Cloud be self-hosted?
Yes, Enterprise customers can deploy Nx Cloud on-premises or on managed infrastructure to maintain full control over data and infrastructure.
SourceCosign: 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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