Cybersecurity · head to head
Cosign vs Saviynt
Cosign
Cybersecurity
Signs and verifies container images and artifacts, with or without managing keys
- From
- Free
- Rated
- -
Saviynt
Cybersecurity
Cloud identity governance with privileged access in the same platform
- From
- On request
- Rated
- -
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.; Saviynt implementation typically runs a year or more with a partner, and the cost of that work regularly exceeds the first year subscription, which is rarely in the initial business case.
- They diverge on capability: Cosign covers Keyless signing, Saviynt covers Identity governance.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Cosign and Saviynt actually diverge.
Identical on both: user rating (Not yet rated), category (Cybersecurity).
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 Saviynt
- Identity governance
- Access certification
- Segregation of duties
- Privileged access
- Cloud entitlements
- Third party access
- Access request
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 Saviynt
- Attaching a signed bill of materials to a release so consumers can verify its provenancenot Saviynt
- Meeting a customer or regulatory requirement for signed artifactsnot Saviynt
- Verifying third-party images before they enter an internal registrynot Saviynt
Saviynt
- An enterprise with an audit finding that privileged administrative accounts are excluded from access reviewsnot Cosign
- A healthcare system governing clinician access to Epic alongside corporate applications in one certification campaignnot Cosign
- A company that has to prove segregation of duties in SAP to an external auditor every yearnot Cosign
- A federal contractor needing an identity governance service with FedRAMP authorisationnot 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.
Saviynt
- Implementation typically runs a year or more with a partner, and the cost of that work regularly exceeds the first year subscription, which is rarely in the initial business case.
- Governance quality is limited by HR and application data quality, so organisations with inconsistent joiner records spend the early phases correcting source data rather than certifying access.
- Pricing is per governed identity, so counting contractors, service accounts and non-employee identities materially changes the bill and the definition is worth negotiating explicitly.
- The privileged access module is younger than the governance core and is not a full substitute for a dedicated PAM product in estates with heavy session recording or credential rotation requirements.
- Connectors to less common applications require custom development, and each one adds a maintenance burden that reappears every time the target application changes its API.
Pricing, plan by plan
Cosign
Free- CosignFree
- Apache-2.0
- Public Sigstore infrastructure free to use
- No usage limits published
Saviynt
On request- Saviynt Identity Cloud$undefined/year
- Priced per governed identity per year
- Modules for governance, privileged access and cloud entitlements
- SaaS delivery with FedRAMP authorised offering available
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.
Questions people ask
- Is Cosign or Saviynt better?
- Neither clearly leads. Cosign starts at Free and Saviynt at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Cosign or Saviynt?
- Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and On request for Saviynt.
- Does Cosign or Saviynt run on more platforms?
- Cosign runs on macOS, Linux, Windows, Docker. Saviynt runs on Web.
- Can I use Cosign for free?
- Yes. Cosign has a free tier, so you can try it without paying. Saviynt 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 Saviynt is typically brought in for.
- What can Cosign do that Saviynt cannot?
- Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. Saviynt covers Identity governance, Access certification, Segregation of duties, Privileged access.
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.
Saviynt: Does Saviynt replace a PAM vendor?
It can for time-bound privileged access, but organisations with heavy session recording, credential rotation or legacy server access requirements often keep a dedicated PAM product alongside it.
Cosign: Is signing alone enough?
No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.
Saviynt: Is there a FedRAMP authorised version?
Yes, Saviynt offers a FedRAMP authorised government cloud offering, which matters where that is an eligibility requirement rather than a preference.
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.
Saviynt: How is it priced?
Per governed identity per year, quoted. Define carefully whether service accounts and contractors count toward the identity total.
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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