Singularity Container Services
Singularity Container Services: A free hosted registry for building, storing, signing, and sharing SIF and OCI images. Ranked #45 of 61 in Container Registries by our editors (6.0/10); pricing: Free plan; best for singularity users needing free image hosting.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forSingularity users needing free image hosting
- Free planYes
- Paid fromNone
- Facts checked22 Sep 2026
Where it wins
- Remote builds avoid elevated local privileges
- Supports SIF and OCI images with signing and verification
- Includes tags, OAuth, and CI/CD support
Where it doesn't
- Free service is limited to one project
- Free library storage is limited to 11 GB
- Registry-management breadth is narrower than general-purpose registries
Our verdict on Singularity Container Services
Singularity Container Services is Sylabs’ hosted platform for building, storing, securing, and sharing Singularity containers. It is aimed at researchers, engineers, and teams working with high-performance or performance-intensive applications. The service combines a hosted container library with a remote container builder, allowing users to create images without elevated local privileges. It supports SIF and OCI image files, including OCI-SIF images backed by an OCI registry, and provides container signing and verification.
The free service covers the core workflow without a paid tier: users can push, pull, store, and share images in the container library, retrieve versioned images with tags, and authenticate through cloud OAuth. It also supports CI/CD through the Singularity Remote Build Client. The published service limits include one project, 11 GB of library storage, and 500 build minutes over a rolling 30-day period. These limits make the platform a practical fit for focused projects and teams that need a hosted Singularity workflow without a listed subscription cost.
Its main strength is specialization rather than broad registry management. Users who need remote Singularity builds, SIF and OCI support, image signing, verification, and sharing should find the feature set aligned with that workflow. Teams managing multiple projects, requiring broader integrations, or seeking the breadth of a general-purpose container registry may need an alternative. Choose Singularity Container Services for free hosted image storage and Singularity-focused build workflows; look elsewhere when registry-management breadth is the primary requirement.
Singularity Container Services pricing
All 1 Singularity Container Services plans and prices →
Singularity Container Services fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Image scanning | Not verified |
| OCI artifacts | Yes |
| Immutable tags | Not verified |
| Retention policies | Not verified |
| Replication scope | Not verified |
| Included storage | Not verified |
| Maximum image size | Not verified |
| Deployment | Cloud |
| Platforms | Web, Linux |
| Support | Email, Community, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan (source) |
| Website | cloud.sylabs.io |
| Facts checked | 22 Sep 2026 |
Alternatives to Singularity Container Services
- HarborA self-hosted Harbor registry with strong policy, scanning, signing, and replication controls.9.4
- QuayA flexible registry for teams that need hosted convenience or self-hosted control.9.3
- 8gears Container RegistryA security-focused Harbor registry with OCI support, policy controls, and flexible deployment options.9.2
See all Singularity Container Services alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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