Instead of Cosign
Cosign alternatives
Cosign covers signing and verification for OCI container images and a broad range of software artifacts, including binaries, scripts, SBOMs, and in-toto attestations. It can keep container signatures alongside images in an OCI registry, and offers keyless signing through Fulcio and Rekor as well as hardware, KMS, encrypted-keypair, and bring-your-own-PKI options. Linux, macOS, Windows, and self-hosted use are supported, with guidance for GitHub Actions and GitLab CI/CD.
- 1
AWS Signer
Free plan APILinuxMac+2AWS workflows for Lambda, IoT, and container signing — AWS Signer manages certificates and keys for Lambda and container workflows, while Cosign supports broader artifact types and signing options.
7.7 Visit site - 2
OpenPubkey
Free plan APILinuxMac+2OIDC identity-linked signatures for users and workloads — OpenPubkey binds OIDC identities to public keys through PK Tokens, unlike Cosign’s Fulcio-and-Rekor keyless signing flow.
- 3
SignPath
Free plan APILinuxMac+3Policy-controlled signing across builds and releases — SignPath can validate build context and approvals and generate SLSA provenance, while Cosign is CLI-oriented and lacks API stability guarantees.
- 4
SignServer
Free plan APILinuxMac+3Centralized server-side signing for varied workflows — SignServer centrally manages keys for code, documents, firmware, containers, and timestamps, while its Community Edition is not intended for production.
- 5
Notation
Free plan LinuxMacWindowsPortable OCI signatures across connected and offline environments — Notation signatures can move between OCI registries and validate in disconnected environments without extra server infrastructure.
- 6
Sigstore
Free plan Open source APILinuxMac+3A broader open-source software supply-chain toolkit — Sigstore combines Cosign with Fulcio, Rekor, OpenID Connect, and Policy Controller technologies as a broader supply-chain project.
- 7
SignPath Foundation
Free plan APIWebEligible open-source projects seeking code-signing certificates — SignPath Foundation provides certificates to eligible open-source projects and requires manual approval for every release.
- 8
Bamboo Deploy
Free plan APILinuxMac+2 - 9
Signo
Free plan APILinuxSelf-hosted - 10
Aujas Automated Code Signing Platform
Paid LinuxMacSelf-hosted+2 - 11
Gitsign
Free plan LinuxMacWindows - 12
Keyfactor Platform
Free trial APISelf-hostedWeb - 13
LAAVAT PKI and Signing Platform
Free trial APISelf-hostedWeb - 14
The Update Framework
Free plan - 15
DigiCert Software Trust Manager
Paid APILinuxMac+2 - 16
Signotaur
Free trial Self-hostedWindows - 17
ComSignTrust Secure Code Signing Platform (ASCS)
Paid APIWeb - 18
CyberArk Code Sign Manager - Self-Hosted
Paid APILinuxMac+3 - 19
GoGetSSL Cloud Code Signing
Paid MacWebWindows - 20
Red Hat Trusted Artifact Signer
Paid LinuxMacSelf-hosted+2 - 21
Code Signing Key Management Server (CSKMS)
Paid APISelf-hosted - 22
GaraTrust
Paid Self-hosted - 23
PACE Code Signing Platform
Paid LinuxMacWindows - 24
sslTrus Remote Code Signing Service
Paid LinuxMacWeb+1
A different tool may fit better if your workflow needs stable application APIs, managed signing, or stronger release-policy controls. Cosign is CLI-oriented, has no API stability guarantees, and is described as a legacy system for signing; its documentation recommends Sigstore-go for verification integrations. Keyless signing can publish identity details such as an account email to a public transparency log, and its generated keys use ECDSA-P256 with SHA256. Compare how alternatives handle identity, key custody, registry portability, build approvals, artifact types, and deployment before switching.