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Cybersecurity · head to head

Cosign vs Jitsu

Cosign logo

Cosign

Cybersecurity

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

From
Free
Rated
-
Full reviewWebsite
Jitsu logo

Jitsu

Developer Tools

Open source event pipeline that streams behavioural data to your own warehouse

From
Free
Rated
-
Full reviewWebsite

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.; Jitsu jitsu is a pipeline, not a customer data platform, so identity resolution, audience building and reverse ETL are absent and a marketing team expecting Segment parity will be disappointed.
  • They diverge on capability: Cosign covers Keyless signing, Jitsu covers Event collection.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Cosign and Jitsu actually diverge.

Attributes where Cosign and Jitsu differ
AttributeCosignJitsu
Pricing modelOpen source, no licence feePer month by event volume
PlatformsmacOS, Linux, Windows, DockerWeb, Linux, Docker, Kubernetes, iOS, Android
CategoryCybersecurityDeveloper Tools

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 Jitsu

  • Event collection
  • Warehouse destinations
  • Connector syncs
  • Transformations
  • Bundled ClickHouse
  • Event debugger
  • Self-hosting
  • Custom domains

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

Jitsu

  • A team paying five figures a year to a customer data platform when all it actually does is send events to Snowflakenot Cosign
  • An engineering group that needs event collection running inside its own VPC for data residency or security review reasonsnot Cosign
  • A product analytics setup that wants raw events in the warehouse as the source of truth rather than trapped in a vendor toolnot Cosign
  • A startup that needs first-party event collection on its own domain to reduce loss from tracker blocking without paying CDP pricesnot 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.

Jitsu

  • Jitsu is a pipeline, not a customer data platform, so identity resolution, audience building and reverse ETL are absent and a marketing team expecting Segment parity will be disappointed.
  • Connector sync frequency is deliberately tiered, with the free plan limited to manual runs and one daily sync, so anything approaching operational freshness requires the paid plan or self-hosting.
  • Self-hosting means you own the reliability of a system that drops data silently when misconfigured, and event loss is uniquely hard to notice because nothing errors, the numbers are just quietly lower.
  • The connector catalogue is far smaller than Fivetran or Airbyte, so if your requirement is pulling from many SaaS sources rather than pushing events, Jitsu is the wrong half of the problem.
  • It is a small company with a small commercial team, so enterprise procurement processes around security review, contractual SLAs and support escalation take longer than with an incumbent vendor.

Pricing, plan by plan

Cosign

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

Jitsu

Free
  • Open SourceFree
    • MIT licence
    • Self-host on any cloud
    • No usage limits
  • Cloud FreeFree
    • Unlimited captured events
    • 200,000 active events per month
    • Manual connector runs only
  • Business$99/month
    • 2,000,000 active events per month
    • $40 per additional million events
    • Hourly connector sync frequency
  • Enterprise$undefined/year
    • Custom event volume
    • One minute sync frequency
    • Unlimited active syncs

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 Jitsu if

  • You need event collection.
  • You want to start without paying.
  • You work on Web, Linux, Docker, Kubernetes, iOS, Android.
  • You also want warehouse destinations.
Jitsu review

Questions people ask

Is Cosign or Jitsu better?
Neither clearly leads. Cosign starts at Free and Jitsu at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cosign or Jitsu?
Cosign starts at Free and Jitsu at Free.
Does Cosign or Jitsu run on more platforms?
Cosign runs on macOS, Linux, Windows, Docker. Jitsu runs on Web, Linux, Docker, Kubernetes, iOS, Android.
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 Jitsu is typically brought in for.
What can Cosign do that Jitsu cannot?
Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations. Jitsu covers Event collection, Warehouse destinations, Connector syncs, Transformations.

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.

Jitsu: Is Jitsu the same as Jitsi?

No. Jitsu is an open source event data pipeline. Jitsi is an unrelated video conferencing project.

Cosign: Is signing alone enough?

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

Jitsu: Can I self-host for free?

Yes. The project is MIT licensed with no usage limits when self-hosted.

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.

Jitsu: How does the cost compare with Segment?

The Business plan is 99 US dollars a month for two million active events, where a per-tracked-user CDP typically costs orders of magnitude more at comparable volume.

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.

Jitsu: Does Jitsu do identity resolution?

No. It transports and transforms events; identity stitching and audiences are not part of the product.

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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