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Cybersecurity · head to head

Burp Suite vs Cosign

Burp Suite logo

Burp Suite

Cybersecurity

The leading toolkit for web security testing

From
Free
Rated
-
Full reviewWebsite
Cosign logo

Cosign

Cybersecurity

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Burp Suite the automated vulnerability scanner is Professional only, at $499; the free Community edition is manual tools; 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.
  • They diverge on capability: Burp Suite covers Web vulnerability scanner, Cosign covers Keyless signing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Burp Suite and Cosign actually diverge.

Attributes where Burp Suite and Cosign differ
AttributeBurp SuiteCosign
Pricing modelsubscriptionOpen source, no licence fee
PlatformsDesktop, ApimacOS, Linux, Windows, Docker
Founded2004Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Burp Suite

  • Web vulnerability scanner
  • Proxy interceptor
  • Intruder
  • Repeater
  • Sequencer
  • Decoder
  • Comparer
  • Logger

Only in Cosign

  • Keyless signing
  • Key and KMS signing
  • Registry-native storage
  • In-toto attestations
  • Offline verification
  • Trusted root and signing config

What people use each for

The jobs each tool is most often brought in to do.

Burp Suite

  • Manual web application penetration testing through an intercepting proxynot Cosign
  • Automated scanning for web vulnerabilities on the Professional editionnot Cosign
  • Extending testing with community-built BApp extensionsnot Cosign
  • Enterprise-wide dynamic scanning through Burp DASTnot Cosign

Cosign

  • Signing container images in a build pipeline without managing long-lived private keysnot Burp Suite
  • Attaching a signed bill of materials to a release so consumers can verify its provenancenot Burp Suite
  • Meeting a customer or regulatory requirement for signed artifactsnot Burp Suite
  • Verifying third-party images before they enter an internal registrynot Burp Suite

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Burp Suite

  • The automated vulnerability scanner is Professional only, at $499; the free Community edition is manual tools
  • BApp Store extensions require the Professional edition
  • DAST and the agentic testing product are separate enterprise offerings with no published price
  • Professional is licensed per user per year rather than perpetually

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.

Pricing, plan by plan

Burp Suite

Free
  • Community EditionFree
    • Essential manual tools
    • Proxy
    • Repeater
  • Professional$449/year
    • All Community features
    • Burp Scanner
    • Advanced manual tools
  • Enterprise$6995/year
    • CI/CD integration
    • Scheduled scans
    • Role-based access

Cosign

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

Which should you pick?

Choose Burp Suite if

  • You need web vulnerability scanner.
  • You want to start without paying.
  • You work on Desktop, Api.
  • You also want proxy interceptor.
Burp Suite review

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

Questions people ask

Is Burp Suite or Cosign better?
Neither clearly leads. Burp Suite starts at Free and Cosign at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Burp Suite or Cosign?
Burp Suite starts at Free and Cosign at Free.
Does Burp Suite or Cosign run on more platforms?
Burp Suite runs on Desktop, Api. Cosign runs on macOS, Linux, Windows, Docker.
Can I use Burp Suite for free?
Both have a free tier, so you can try either at no cost before committing.
What is Burp Suite best used for?
Burp Suite is most often used for manual web application penetration testing through an intercepting proxy, automated scanning for web vulnerabilities on the professional edition, extending testing with community-built bapp extensions, enterprise-wide dynamic scanning through burp dast. Of those, manual web application penetration testing through an intercepting proxy and automated scanning for web vulnerabilities on the professional edition are not what Cosign is typically brought in for.
What can Burp Suite do that Cosign cannot?
Burp Suite covers Web vulnerability scanner, Proxy interceptor, Intruder, Repeater. Cosign covers Keyless signing, Key and KMS signing, Registry-native storage, In-toto attestations.

Answered from the vendors’ own pages

Burp Suite: Does Burp Suite offer a free version?

Yes, Burp Suite Community Edition is available free and supports manual testing. The page does not provide specific details on additional paid editions or their pricing.

Source
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.

Burp Suite: What features are available in the free edition?

Burp Suite Community Edition supports manual security testing, though specific feature limitations compared to paid editions are not detailed on this page. Visit individual product pages for detailed tier comparisons.

Source
Cosign: Is signing alone enough?

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

Burp Suite: Are paid versions of Burp Suite available?

Yes, PortSwigger offers Burp Suite Professional and Burp Suite DAST as paid products, though specific pricing and feature details are not available on the main product page.

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.

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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