DevGuard vs Sigstore

DevGuard is an open-source developer security platform focused on hardening the software supply chain. It monitors deployed software for newly disclosed vulnerabilities and can create issues when new CVEs affect software. Risk scoring and exploit probability analysis help prioritize findings, while VEX assessment sharing supports review of potential false positives. The platform connects with GitHub and GitLab repositories, CI pipelines, and issue trackers, and can ingest SBOM, VEX, and SARIF inputs from compatible tools. Its scanner CLI supports software composition analysis, static application security testing, and signing attestations. A dependency firewall checks npm, Go, PyPI, and container image requests against a malicious package database and blocks known-bad releases. DevGuard also supports SBOM management, artifact signing, provenance attestations, and release policy gates. The source code is distributed under AGPL-3.0-or-later. The free self-hosted Open Source plan is for public projects with an OSI-approved license; non-commercial FLOSS projects can get SaaS free. Business SaaS costs €449.10 per month on a one-year contract paid yearly and includes 10 users, managed hosting in Germany, and support.

Sigstore is a free, open source project for signing and verifying software artifacts to improve supply chain security. It supports release files, container images, binaries, software bills of materials, and more. Signatures use temporary keys, so developers do not have to manage signing keys; events are recorded in a tamper-resistant public log for audit. Its components include Cosign, Fulcio, Rekor, OpenID Connect, and Policy Controller. Cosign signs and verifies artifacts and stores signatures in an OCI registry. Fulcio issues temporary certificates to authorized identities, while Rekor keeps signed metadata in a searchable ledger. OpenID Connect authenticates users through providers such as GitHub and Google. The trust root uses The Update Framework and is maintained by five keyholders from different companies and academic institutions. Sigstore provides GitHub Actions, documents GitLab CI installation, and offers official clients for Go, Java, JavaScript, Python, Ruby, and Rust. It supports API, Linux, macOS, Windows, and self-hosted environments. One integration caveat is that Cosign has no API stability guarantees, does not follow semantic versioning, and is not recommended for application integration because of its dependencies.