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Cybersecurity · head to head

Cosign vs SentinelOne Singularity

Cosign logo

Cosign

Cybersecurity

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

From
Free
Rated
-
Full reviewWebsite
SentinelOne Singularity logo

SentinelOne Singularity

Cybersecurity

Autonomous AI-powered endpoint security

From
$5.83/month
Rated
-
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.; SentinelOne Singularity deployment and configuration requires professional services ($5,000 to $25,000)
  • They diverge on capability: Cosign covers Keyless signing, SentinelOne Singularity covers Behavioral AI.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cosign and SentinelOne Singularity actually diverge.

Attributes where Cosign and SentinelOne Singularity differ
AttributeCosignSentinelOne Singularity
Starting priceFree$5.83/month
Pricing modelOpen source, no licence feeUnknown
Free tierYesNo
PlatformsmacOS, Linux, Windows, DockerWindows, macOS, Linux, Cloud, Mobile
FoundedUnknown2013

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 SentinelOne Singularity

  • Behavioral AI
  • Autonomous response
  • ActiveEDR
  • Storyline technology
  • Rollback remediation
  • Ranger IoT
  • Cloud workload protection
  • Identity security

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

SentinelOne Singularity

  • Endpoint Securitynot Cosign
  • Edrnot Cosign
  • Xdrnot 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.

SentinelOne Singularity

  • Deployment and configuration requires professional services ($5,000 to $25,000)
  • Optional modules like Ranger and Vigilance add to total cost of ownership
  • Complex pricing tiers make budgeting difficult for large deployments

Pricing, plan by plan

Cosign

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

SentinelOne Singularity

$5.83/month
  • Singularity Core$5.83/month per endpoint
    • Endpoint Protection Platform (EPP)
    • Malware prevention
    • Threat isolation
  • Singularity Control$6.67/month per endpoint
    • All Core features
    • Device control
    • Firewall control
  • Singularity Complete$8.25/month per endpoint
    • All Control features
    • Endpoint Detection and Response
    • XDR capabilities
  • Singularity Commercial$17.5/month per endpoint
    • All Complete features
    • Identity protection
    • Cloud protection

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 SentinelOne Singularity if

  • You need behavioral ai.
  • You work on Windows, macOS, Linux, Cloud, Mobile.
  • You also want autonomous response.
SentinelOne Singularity review

Questions people ask

Is Cosign or SentinelOne Singularity better?
Neither clearly leads. Cosign starts at Free and SentinelOne Singularity at $5.83/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cosign or SentinelOne Singularity?
Cosign has a free tier; the other does not. Paid plans start at Free for Cosign and $5.83/month for SentinelOne Singularity.
Does Cosign or SentinelOne Singularity run on more platforms?
Cosign runs on macOS, Linux, Windows, Docker. SentinelOne Singularity runs on Windows, macOS, Linux, Cloud, Mobile.
Can I use Cosign for free?
Yes. Cosign has a free tier, so you can try it without paying. SentinelOne Singularity starts at $5.83/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 SentinelOne Singularity is typically brought in for.
What can Cosign do that SentinelOne Singularity cannot?
Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. SentinelOne Singularity covers Behavioral AI, Autonomous response, ActiveEDR, Storyline technology.

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.

SentinelOne Singularity: What does SentinelOne Singularity XDR cover?

Singularity XDR unifies detection and response across endpoints, cloud, identity, network, and mobile, providing centralized visibility and automated response across all attack surfaces.

Source
Cosign: Is signing alone enough?

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

SentinelOne Singularity: How does SentinelOne correlate data across security tools?

Singularity normalizes data from endpoints, identity, cloud, and third-party security tools into a unified data layer, enabling automatic correlation of signals without manual integration.

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.

SentinelOne Singularity: Can SentinelOne integrate with existing security tools?

Yes, Singularity Marketplace provides pre-built, one-click integrations with email, network, firewall, and SaaS security tools, avoiding vendor lock-in while extending detection capabilities.

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.

SentinelOne Singularity: What is the pricing model for SentinelOne Singularity?

SentinelOne pricing ranges from $5.83 to $17.50 per endpoint per month across five tiers, with optional add-on modules and enterprise pricing available on request.

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.

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