Harmonia vs Omni Line Multipurpose Artifact Registry

Harmonia is free, open-source software for serving a Nix store as a binary cache over HTTP. Written in Rust for Linux self-hosting, it supports HTTP range requests for NAR streaming and streaming build logs. The /serve// endpoint can provide package contents and discover index.html to serve websites directly from the Nix store. Harmonia can transparently compress content with zstd and provide TLS when no frontend web server is used. Documentation covers a NixOS module and nginx HTTPS frontend configuration for a public cache. Narinfo signing is disabled unless private signing-key paths are supplied. Prometheus metrics are available at /metrics, with a Grafana dashboard included in the repository. Since version 3.1.0, metadata is read directly from db.sqlite without a nix-daemon connection. Version 3.3.0 adds harmonia-gc for removing store garbage while nix-daemon builds. It uses the MIT License.

Omni Line Multipurpose Artifact Registry is a self-hosted registry for software packages and artifacts. It supports npm, Composer, Docker, PyPI, Go, Cargo, Maven, RubyGems, Conan, and generic artifacts, with hosted, proxy, and virtual registry modes. Its Multipurpose registry handles uploads and downloads of deployment packages and binaries. Teams can use familiar ecosystem clients and command-line tools by directing them to an Omni Line URL.

Package scanning checks against the public OSV database; optional controls can block installs of known malware or packages below configured severity floors. The management UI supports OIDC single sign-on, while personal access tokens serve CLI and CI authentication and organization roles scope registry permissions. Deployment options include Docker Compose, Helm, Ansible, and cloud templates for AWS, Azure, and DigitalOcean. Artifacts can reside on a local filesystem or S3-compatible storage, with PostgreSQL metadata on infrastructure the operator runs. Omni Line is proprietary commercial software, not open source. A self-hosted trial includes every feature for 30 days. Pro costs $2,499 a year.