Cybersecurity · head to head
Cosign vs Octopus Deploy
Cosign
Cybersecurity
Signs and verifies container images and artifacts, with or without managing keys
- From
- Free
- Free plan
- Yes
Octopus Deploy
Developer Tools
Continuous delivery and runbook automation for releases
- 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.; Octopus Deploy free tier caps at 10 projects, 10 tenants, 10 machines, 10 users, 5 concurrent tasks and 1 space
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Cosign and Octopus Deploy actually diverge.
| Attribute | Cosign | Octopus Deploy |
|---|---|---|
| Pricing model | Open source, no licence fee | subscription |
| Platforms | macOS, Linux, Windows, Docker | Web |
| Category | Cybersecurity | Developer 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 Octopus Deploy
Nothing recorded that Cosign does not also cover.
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 Octopus Deploy
- Attaching a signed bill of materials to a release so consumers can verify its provenancenot Octopus Deploy
- Meeting a customer or regulatory requirement for signed artifactsnot Octopus Deploy
- Verifying third-party images before they enter an internal registrynot Octopus Deploy
Octopus Deploy
- Automating software deployments across development, testing, productionnot Cosign
- Automating emergency tasks like website failover and incident responsenot Cosign
- Managing multi-tenant deployments without duplicating configurationnot Cosign
- Tracking DORA metrics and enforcing deployment approval gatesnot 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.
Octopus Deploy
- Free tier caps at 10 projects, 10 tenants, 10 machines, 10 users, 5 concurrent tasks and 1 space
- Annual billing is the only option for both Octopus Cloud and Octopus Server; there is no monthly plan
- Professional cloud tier is $4,330 per year and Enterprise cloud is $24,600 per year, with tenants and machines sold as add-ons beyond the free allotment
Pricing, plan by plan
Cosign
Free- CosignFree
- Apache-2.0
- Public Sigstore infrastructure free to use
- No usage limits published
Octopus Deploy
Free- FreeFree
- 10 projects
- 10 tenants
- 10 machines
- Professional (Cloud)$4330/year
- Up to 100 projects
- Unlimited spaces and users
- Tenants and machines available as add-ons
- Professional (Server)$2080/year
- Up to 100 projects
- Unlimited spaces and users
- Tenants and machines available as add-ons
- Enterprise (Cloud)$24600/year
- 100+ projects supported
- Unlimited spaces and users
- 20 concurrent tasks
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 Octopus Deploy better?
- Neither clearly leads. Cosign starts at Free and Octopus Deploy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Cosign or Octopus Deploy?
- Cosign starts at Free and Octopus Deploy at Free.
- Does Cosign or Octopus Deploy run on more platforms?
- Cosign runs on macOS, Linux, Windows, Docker. Octopus Deploy runs on Web.
- 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 Octopus Deploy is typically brought in for.
- What can Cosign do that Octopus Deploy cannot?
- Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations.
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.
Octopus Deploy: How much does Octopus Deploy cost?
Octopus Deploy offers a free tier at $0/year with limits on projects (10), users (10), and tenants (10). Professional plans start at $2,080/year for self-hosted or $4,330/year for cloud hosting.
SourceCosign: Is signing alone enough?
No. Verification is a command somebody runs. Without an admission controller enforcing it, an unsigned image still runs.
Octopus Deploy: What does the free Octopus Deploy tier include?
The free tier includes 10 projects, 10 tenants, 10 machines, 10 users, 5 concurrent tasks, 1TB file storage, 100GB database storage, and community support only.
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.
Octopus Deploy: Can I try Octopus Deploy for free before purchasing?
Yes, a free tier is available with unlimited duration but capped usage, plus a 30-day free trial with full Enterprise features is offered to evaluate the platform.
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.
Octopus Deploy: What are the Enterprise pricing differences between Cloud and Server hosting?
Enterprise Cloud hosting costs $24,600/year and includes 20 concurrent tasks and 24/7 support. Enterprise Server self-hosted costs $15,600/year with flexible concurrent task configuration and 24/7 support.
SourceCosign: 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.
Related pages
More on Octopus Deploy
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