An OCI-native artifact manager and image registry that is easy to deploy and maintain, supporting Docker, Helm, and other OCI artifacts.
Sigma is an OCI-native artifact manager and image registry that provides a private, standards-compliant solution for storing and managing container images and OCI artifacts. It solves the problem of deploying and maintaining a lightweight yet full-featured registry that works seamlessly with tools like Docker, Helm, and ORAS. By adhering to the OCI Distribution Specification, it ensures broad compatibility and simplifies artifact management in cloud-native environments.
DevOps engineers, platform teams, and developers who need a private, self-hosted registry for container images and OCI artifacts in cloud-native or on-premises environments.
Developers choose Sigma for its ease of deployment, strict OCI compliance, and comprehensive feature set including security scanning and artifact support, offering a simpler alternative to more complex registries like Harbor.
OCI-Native artifact manager
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Fully adheres to OCI Distribution Specification 1.1, ensuring seamless compatibility with Docker, Helm, ORAS, and other standard tools as highlighted in the README.
Supports OCI artifacts like Helm charts and SBOMs, making it a versatile registry for various cloud-native workflows without needing separate tools.
Includes built-in image security scanning and signing, enhancing security posture directly within the registry, as listed in the features.
Can be run with a single Docker command, simplifying setup and maintenance compared to more complex registries like Harbor, per the quick start guide.
Lacks image replication functionality (marked as unsupported in the README), which is critical for high-availability and backup scenarios.
As a newer project, it has fewer community contributions, plugins, and may have limited documentation compared to established alternatives like Harbor.
Ships with a hardcoded default password (Admin@123), requiring manual configuration for secure production use, which adds setup overhead.
sigma is an open-source alternative to the following products:
Harbor is an open-source cloud native registry that stores, signs, and scans container images for vulnerabilities, providing role-based access control.
Zotero is a free, open-source reference management software that helps researchers collect, organize, cite, and share research sources and bibliographic data.
Distribution is a tool for managing and distributing software packages, often referring to Linux distributions or package management systems. In a general software context, it can refer to systems that handle the packaging and delivery of applications.
Docker Hub private registry is a feature of Docker Hub that allows users to store and manage private Docker images securely, accessible only to authorized users.