Cybersecurity · head to head
Cosign vs iDenfy
Cosign
Cybersecurity
Signs and verifies container images and artifacts, with or without managing keys
- From
- Free
- Rated
- -
iDenfy
Cybersecurity
Identity verification and AML screening bundled into a single per-verification price
- 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.; iDenfy rates are quoted rather than published on an accessible page, so despite the marketing emphasis on transparency you still need a sales conversation to get a number.
- They diverge on capability: Cosign covers Keyless signing, iDenfy covers Document verification.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Cosign and iDenfy 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 iDenfy
- Document verification
- Human review on all cases
- AML screening
- Business verification
- Proof of address
- NFC chip reading
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 iDenfy
- Attaching a signed bill of materials to a release so consumers can verify its provenancenot iDenfy
- Meeting a customer or regulatory requirement for signed artifactsnot iDenfy
- Verifying third-party images before they enter an internal registrynot iDenfy
iDenfy
- A European fintech that needs KYC and AML screening and wants one price rather than four line itemsnot Cosign
- A gambling operator in a regulated EU market needing age and identity assurance with EU data processingnot Cosign
- A crypto platform with modest volume that cannot meet the minimum commitments larger vendors requirenot Cosign
- A marketplace wanting NFC passport chip reading for higher assurance without an enterprise contractnot 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.
iDenfy
- Rates are quoted rather than published on an accessible page, so despite the marketing emphasis on transparency you still need a sales conversation to get a number.
- It is a smaller vendor than the market leaders, which makes it a harder sell through enterprise vendor-risk review even when the product performs well.
- Human review on every case caps throughput in a way fully automated competitors are not constrained by, which shows up as latency during volume spikes.
- Coverage and accuracy are strongest on European documents; performance on some Asian, African and Latin American document types trails specialists in those regions.
- The bundled AML screening uses its chosen data sources, so institutions mandated to use a specific list provider such as Dow Jones cannot substitute it and end up paying twice.
Pricing, plan by plan
Cosign
Free- CosignFree
- Apache-2.0
- Public Sigstore infrastructure free to use
- No usage limits published
iDenfy
On request- iDenfy Verification$undefined/verification
- Volume-tiered per-verification rates quoted on request
- AML screening bundled rather than charged per check
- No monthly minimum advertised
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 iDenfy if
- You need document verification.
- You work on Web, iOS, Android, API.
- You also want human review on all cases.
Questions people ask
- Is Cosign or iDenfy better?
- Neither clearly leads. Cosign starts at Free and iDenfy at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Cosign or iDenfy?
- Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and On request for iDenfy.
- Does Cosign or iDenfy run on more platforms?
- Cosign runs on macOS, Linux, Windows, Docker. iDenfy runs on Web, iOS, Android, API.
- Can I use Cosign for free?
- Yes. Cosign has a free tier, so you can try it without paying. iDenfy 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 iDenfy is typically brought in for.
- What can Cosign do that iDenfy cannot?
- Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. iDenfy covers Document verification, Human review on all cases, AML screening, Business verification.
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.
iDenfy: Is AML screening included in the verification price?
That is the pitch, screening bundled rather than sold as a per-check add-on. Confirm which sanctions and PEP data sources are behind it before you rely on it.
Cosign: Is signing alone enough?
No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.
iDenfy: Is there a monthly minimum?
iDenfy markets itself as having no monthly minimum, in contrast to competitors charging $49 to $299 a month. Get that in writing in the contract.
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.
iDenfy: Where is data processed?
iDenfy is established in Lithuania and processes in the EU, which simplifies GDPR transfer assessments compared with United States-headquartered vendors.
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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- iDenfy vs Varonis Data Security Platform
- iDenfy vs VMware Carbon Black
- iDenfy vs WorkOS
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