SingularityCE

What SingularityCE is

SingularityCE is a free, open-source container tool for packaging software into portable, reproducible single files. Created for complex applications on high-performance computing clusters, it is also used in academia and industry. A container built on a laptop can run on HPC clusters, university or company clusters, servers, cloud, or workstations. SingularityCE uses the single-file Singularity Image Format and supports compatibility with Docker and OCI container formats. Its guide covers builds from definition files, remote builds, and non-root builds using fakeroot. The product page states that it has built-in GPU and high-speed interconnect support; the guide also documents GPU access, containerized MPI applications, OCI registries, and Sylabs Container Services Library usage. Containers can be signed with PGP keys and encrypted with LUKS2. By default, a user inside a container retains the outside identity and cannot gain extra host privileges. The software runs on Linux and is self-hosted. Open-source users can seek best-effort community support. Sylabs says engineering and engineering support will cease on October 25, 2026, and that version 4.6 is expected to be its final managed release.