Side by side
Kata Containers vs SingularityCE
Both stand on container engines. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Choose Kata Containers if you need container ecosystem compatibility alongside workload isolation using lightweight virtual machines. Its Apache 2.0 license and broad listed hypervisor and architecture support may suit Linux deployments. Look elsewhere if you require Windows containers or long-term-support release branches.
Visit Kata Containers
Choose SingularityCE for free, Linux-based container packaging across HPC and other computing environments, especially when GPU support, MPI workloads, or rootless building matter. Its portable image format and Docker and OCI compatibility support varied workflows. Look elsewhere if you need Windows containers or ongoing engineering and engineering support from Sylabs after October 25, 2026.
Visit SingularityCEThe facts
| Kata Containers | SingularityCE | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Self-hosted | Linux, Self-hosted |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | katacontainers.io | sylabs.io |
| On container engines | #17 of 31 | #21 of 31 |
Kata Containers: what it does well
- Free to use and distribute under the Apache 2.0 license.
- Each workload runs in a dedicated kernel.
- Supports OCI container images and Kubernetes CRI.
- Integrates with Docker and Kubernetes management layers.
- Supports multiple hypervisors and listed hardware architectures.
What to know first
- Requires nested virtualization or bare metal.
- Only the current monthly release series receives security fixes.
- Previous releases are unsupported, with no long-term-support branches.
- Windows containers are not supported.
SingularityCE: what it does well
- Packages software as a portable, shareable single-file image.
- Supports compatibility with Docker and OCI container formats.
- Supports GPU workloads and high-speed interconnects.
- Containers can be built as a non-root user with fakeroot.
- PGP signing and LUKS2 encryption are supported.
What to know first
- Runs on Linux hosts.
- Windows containers are not supported.
- Sylabs plans to stop engineering and engineering support on October 25, 2026.
Alternatives to Kata Containers Alternatives to SingularityCE The whole list