Free and open first
Best Container Engines in 2026
Container engines provide ways to build or run container images, with differences in runtime support and compatibility across hosts. Compared on image building, image format, Kubernetes CRI, and runtime interface, these entries also cover rootless mode, supported host operating systems, and Windows containers. Free-plan availability and paid-from pricing are listed as well. Apptainer, BuildKit, and Docker Desktop are among the entries shown, alongside Incus and Podman. Compare the runtime and host details with the workloads you plan to run, and consider whether image building or rootless operation is important in your environment.
- 31 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Apptainer
Free plan APILinuxMac+2Apptainer is oriented toward portable container workloads on Linux, particularly in HPC settings.
- 2
BuildKit
Free plan APILinuxMac+2BuildKit offers a flexible build toolkit with caching, multiple frontends and outputs, and rootless execution.
- 3
Apple container
Free plan MacSelf-hostedApple container provides isolated Linux containers and OCI image workflows on supported Apple silicon Macs. Its macOS requirement, active development, and memory behavior are key constraints.
- 4
Buildah
Free plan APILinuxSelf-hostedBuildah offers several image-building routes and container-management commands in a free Linux command-line tool.
- 5
containerd
Free plan LinuxSelf-hostedWindowscontainerd provides lifecycle management and Kubernetes runtime support for larger systems on Linux or Windows.
- 6
Incus
Free plan APILinuxMac+2Incus combines container and virtual-machine management with storage, networking, migration, and resource controls.
- 7
Charliecloud
Free plan LinuxSelf-hostedCharliecloud provides a Linux container workflow tailored to high-performance computing, with image-building, registry, and accelerator support.
- 8
crun
Free plan LinuxSelf-hostedcrun provides a free, Linux-focused OCI runtime with command-line container operations and rootless support. Note the cgroup v1 deprecation and limited guarantees for fixes to older versions.
- 9
LXD
Free plan APILinuxSelf-hosted+1LXD provides a single open-source platform for managing both containers and virtual machines, with several interfaces and integrations.
- 10
Enroot
Free plan LinuxSelf-hostedPick Enroot for Linux container workflows where rootless operation, portability, and reproducibility matter more than strong isolation.
- 11
gVisor
Free plan LinuxSelf-hostedgVisor provides a Linux container sandbox with syscall handling, filesystem mediation, and integrations for common container environments.
- 12
Inclavare Containers
Free plan LinuxSelf-hostedChoose Inclavare Containers if your Linux deployment needs protected containers, hardware-backed isolation, and remote attestation.
- 13
LXC
Free plan APILinuxSelf-hostedLXC provides Linux-native containers with several process-containment mechanisms and language bindings.
- 14
Podman
Free plan APILinuxMac+2Podman offers a daemonless container engine with image, Kubernetes, and Desktop workflows. It is free under Apache License 2.0, though Windows containers are not supported.
- 15
AppJail
Free plan Self-hostedAppJail provides a broad FreeBSD jail framework covering lifecycle automation, storage, networking, monitoring, and container deployment.
- 16
CRI-O
Free plan APILinuxSelf-hostedChoose CRI-O for a Linux Kubernetes environment that needs a container runtime implementing CRI and supporting OCI containers. Its runtime, storage, and CNI options suit varied cluster setups.
- 17
Kata Containers
Free plan LinuxSelf-hostedChoose Kata Containers if you need container ecosystem compatibility alongside workload isolation using lightweight virtual machines.
- 18
balenaEngine
Free plan LinuxbalenaEngine provides a compact Docker-compatible runtime for constrained devices.
- 19
Moby
Free plan APILinuxMac+2Choose Moby if you want to build or modify a container based system from modular components and reference assemblies. Its free Apache licensed framework supports several host systems and output types.
- 20
OpenVZ
Free plan LinuxSelf-hostedOpenVZ offers Linux container virtualization with host resource sharing, isolation, and live snapshots. Administrators should account for its Linux-only support and limited backup integration.
- 21
SingularityCE
Free plan LinuxSelf-hostedChoose SingularityCE for free, Linux-based container packaging across HPC and other computing environments, especially when GPU support, MPI workloads, or rootless building matter.
- 22
Sysbox
Free plan LinuxSelf-hostedChoose Sysbox if you need a free Linux runtime for rootless system workloads, containerized development, or CI/CD.
- 23
PouchContainer
Free plan APILinuxSelf-hostedPouchContainer combines standards support, Kubernetes integration, image building, and selectable LXC or hypervisor runtimes.
- 24
Shifter
Free plan APILinuxSelf-hostedShifter combines registry image conversion, compute-node execution, scheduler integration, and HPC-specific communication support.
- 25
systemd-nspawn
Free plan LinuxSelf-hostedsystemd-nspawn provides container execution and management integrated with systemd on Linux. Review its unprivileged limits and user-namespace guidance before using it for untrusted code.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
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