DevGuard vs GUAC

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.

GUAC ingests software metadata, including software bills of materials, and connects it into a queryable view of supply-chain relationships. That portfolio-level view lets developers, operations and security practitioners, and Open Source Program Offices examine dependencies across software rather than one SBOM at a time. Teams can look for vulnerable, deprecated, unsupported, or duplicated dependencies and identify risky upstreams using OpenSSF Scorecard. APIs and a visualization tool support queries and exploration. GUAC documents SPDX and CycloneDX SBOM formats, with graph enrichment from OSV for vulnerability data, ClearlyDefined for license information, and Deps.dev for dependency information. Its GraphQL server can use in-memory storage or PostgreSQL for persistence. Collectors can read or watch files, storage buckets, and Git repositories; the filesystem collector is stable, while other collectors are experimental. Setup uses Docker Compose and requires Docker, Docker Compose, and jq. The project is an OpenSSF Incubating Project. GUAC is free and open source: its code is under the MIT license, and documentation content is under CC BY 4.0.