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Singularity Registry Server

Free#58 of 61 in Container Registries

Singularity Registry Server: A focused, open-source registry for teams managing Singularity images themselves. Ranked #58 of 61 in Container Registries by our editors (6.0/10); pricing: Open source; best for self-hosting a Singularity image service.

6.0/10Editor score
Visit SingularityHub
Singularity Registry Server6.0 Visit SingularityHub

At a glance

  • Editor score
    6.0 / 10
  • Pricing
    Open source
  • Best for
    Self-hosting a Singularity image service
  • Paid from
    None
  • Facts checked
    22 Sep 2026
Singularity Registry Server screenshot

  • Where it wins

    • Native Singularity pull and authenticated push workflows
    • Collections, teams, accounts, and credentials for organization
    • REST API, MinIO storage, Redis jobs, and Docker Compose deployment

  • Where it doesn't

    • Focused on Singularity images rather than OCI artifacts
    • Does not include verified image vulnerability scanning
    • No documented retention or replication features

Our verdict on Singularity Registry Server

Singularity Registry Server is an open-source, self-hosted registry for institutions, clusters, and individual users managing Singularity container images. It provides web and API endpoints for saving and obtaining containers, with collections for organization and native Singularity client support for pulling and pushing images. User accounts, teams, credentials, and bearer-token authentication make it suitable for groups that need controlled access to an internally operated image service.

Its strongest fit is the Singularity workflow. The registry supports native pulls through the Sylabs Library API and authenticated native pushes, while the web interface organizes containers into collections. A REST API extends access beyond the interface, and tag freezing or protection supports a more controlled image-publishing process. Deployment is built around containerized services and Docker Compose, with MinIO-backed object storage and Redis handling background jobs. Nginx and the Singularity client are also part of its integration surface.

The trade-off is a narrow scope. Singularity Registry Server centers on Singularity images and does not include verified vulnerability scanning or OCI artifact support. It also does not provide documented retention or replication features, making it less suitable for organizations that need broader registry governance or multi-site distribution controls. Choose it when self-hosting, Singularity-native operations, collections, and team access are the priority. Consider an alternative when your registry must cover OCI artifacts, image security scanning, retention management, or replication as core capabilities.

Singularity Registry Server pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.
See plans on singularityhub.github.io

Singularity Registry Server fact sheet

Free planNot verified
Paid fromNone
Image scanningNot verified
OCI artifactsNot verified
Immutable tagsYes
Retention policiesNot verified
Replication scopeNot verified
Included storageNot verified
Maximum image sizeNot verified
DeploymentSelf-hosted
SupportCommunity, Docs
Built forSmall business, Mid-market, Enterprise (editorial estimate)
Integrations5 integrations: Docker Compose, MinIO, Redis, Nginx, Singularity client
PricingOpen source
Websitesingularityhub.github.io
Facts checked22 Sep 2026

Singularity Registry Server integrations

Singularity Registry Server lists 5 integrations on its own site.

  • Docker Compose
  • MinIO
  • Redis
  • Nginx
  • Singularity client

Alternatives to Singularity Registry Server

See all Singularity Registry Server alternatives →

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Featured on iTechGuides

Featured on iTechGuides — Singularity Registry Server 6.0/10

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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