Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Cosign review

Free#9 of 28 in Code Signing Software

A flexible open-source choice for signing cloud-native artifacts across modern registries and CI pipelines.

8.3/10Editor score
Visit Cosign
Cosign8.3 Visit Cosign

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Cosign is an open-source command-line tool from the Sigstore project for signing and verifying OCI container images and a broad range of software artifacts. It is suited to development and security teams that need artifact integrity across container registries, automated build pipelines, and cloud-native delivery workflows. Supported targets include blobs, binaries, scripts, configuration files, SBOMs, WASM modules, Tekton bundles, eBPF modules, and In-Toto attestations.

Its ecosystem fit is a major strength. Cosign supports AWS Elastic Container Registry, GCP Artifact Registry, Docker Hub, Azure Container Registry, JFrog Artifactory, GitLab Container Registry, GitHub Container Registry, Harbor, and Cloudsmith. GitHub Actions and GitLab CI installation options support automated signing in build pipelines. Keyless signing uses Fulcio certificates and Rekor transparency logging, while encrypted key pairs, hardware tokens, KMS providers, and bring-your-own PKI support provide alternatives for different trust models. Offline verification using Sigstore bundles is also available.

Cosign stands out for the breadth of artifact types and signing approaches it covers without a vendor-priced hosted tier. Its feature set includes certificate-based signing, timestamping, HSM key protection, CI/CD signing, container registry storage, and attestations. That makes it a strong fit for teams building a software supply-chain signing workflow around containers and related artifacts. It is less suitable for organizations seeking a hosted interface, commercial plan tiers, or broader platform coverage beyond Linux and macOS. Teams that prefer a managed service or a non-command-line-first experience should consider an alternative.

Cosign pros and cons

  • Where it wins
    • Keyless signing with Fulcio certificates and Rekor transparency logging
    • Supports containers, binaries, blobs, SBOMs, attestations, and more
    • Works with hardware tokens, KMS providers, and bring-your-own PKI
  • Where it doesn't
    • Platform coverage is limited to Linux and macOS
    • Command-line workflows may require technical implementation effort
    • No vendor-priced hosted plans or commercial tiers

Cosign fact sheet, pricing and score →

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated · How we research and update