Apptainer
6.7#4 in container enginesFree planFree planAPILinuxmacOSSelf-hosted
VisitApptainer vs BuildKit
What both publish
| Fact | Apptainer | BuildKit |
|---|---|---|
| Purpose | Apptainer creates and runs containers that package software for portability and reproducibility. | BuildKit converts source code into build artifacts efficiently and repeatably. |
| Security model | By default, users retain the same identity inside the container and cannot gain additional host privileges. | BuildKit describes itself as secure by default and usable with untrusted sources. |
| Security reporting | The Technical Steering Committee manages project security, and the policy directs vulnerability reports through private contact with the project. | Security issues should be reported privately to [email protected], and the project currently does not offer a paid security bounty program. |
| Support | Free support resources include Slack, a mailing list, and GitHub, while commercial support and services are offered through CIQ. | The README directs users to the #buildkit channel on Docker Community Slack. |
Apptainer plans
- ApptainerFree
BuildKit plans
- BuildKit (Apache License 2.0)Free
Pick Apptainer if…
It suits users running complex applications on shared HPC clusters, including researchers and teams in academia or industry. It also fits people who need portable containers and host resource access without default privilege escalation.
Pick BuildKit if…
BuildKit suits developers and teams who need configurable, cache-aware builds and multiple artifact formats. It also fits users who want rootless execution or integration with Docker and other listed projects.