Security

7 Best Free and Open Source Supply Chain Integrity Tools

Software supply chain integrity tools help protect the processes used to develop, build, distribute, and deploy software. Modern applications rely on numerous dependencies, automated build systems, container images, and third-party components. Each introduces potential security risks, including malicious modifications, compromised build environments, and the distribution of untrusted software artifacts.

These tools provide mechanisms for verifying software authenticity, establishing provenance, and detecting unauthorised changes. Capabilities include cryptographic signing, signature verification, build attestations, policy enforcement, and tracking the steps involved in producing software. Together, they help establish confidence that software originates from a trusted source and has not been tampered with during development or distribution.

Software supply chain integrity tools are particularly valuable to software developers, DevOps engineers, security professionals, system administrators, and organisations managing complex deployment pipelines. They are especially relevant in environments using continuous integration and continuous delivery (CI/CD), containers, and Kubernetes, where automated verification can reduce security risks without disrupting established workflows.

Here’s our verdict captured in a legendary LinuxLinks-style ratings chart. Only free and open source software is eligible for inclusion.

Ratings chart

Click the links to learn more about each tool.

Supply Chain Integrity Tools
cosignSigns and verifies container images and software artifacts
in-totoSecures software supply chains with verifiable build steps
ConnaisseurEnforces container image signature verification in Kubernetes
WitnessRecords and verifies attestations across software builds
SLSA verifierVerifies software provenance against SLSA requirements
NotationSigns and verifies OCI artifacts using digital signatures
gittufAdds security policies and tamper evidence to Git repositories
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