BuildKit vs Podman
BuildKit
github.com
Podman
podman.ioSide by side
| Figure | BuildKit | Podman |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Container Engines | 8.9 (#2) | 7.7 (#12) |
| API | The daemon listens on a gRPC API at /run/buildkit/buildkitd.sock by default and can also use TCP sockets. | Podman on macOS and Windows listens for Docker API clients, and its installation page describes programmatic access from a language of the user’s choice. |
| Integrations | BuildKit documentation lists integrations or usage with Podman, nerdctl, Kubernetes, Docker buildx, GitHub Actions cache, S3 cache, Azure Blob Storage cache, and OpenTelemetry. | The Podman site lists support in Visual Studio Code, Cirrus CLI, GitHub Actions, and kind. |
| License | BuildKit is distributed under the Apache License, Version 2.0, which grants perpetual, worldwide, non-exclusive, no-charge, royalty-free copyright rights subject to the license terms. | The Podman homepage identifies the project as Apache License 2.0. |
| Platforms | The buildctl client is available for Linux, macOS, and Windows, while the buildkitd daemon is available for Linux and Windows. | Podman runs on macOS and Windows using a guest Linux system managed as a Podman machine, and the installation page lists Linux distributions including Debian, Ubuntu, Fedora, and CentOS Stream. |
| Purpose | BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. | Podman manages containers, pods, and images and supports finding, running, building, and sharing containers. |
| Support | The project directs users to the #buildkit channel on Docker Community Slack and to GitHub issues for reporting problems with release binaries. | The project points users to its troubleshooting guide, documentation, issue tracker, Matrix, Discord, IRC, mailing list, and community meetings. |
Plans
In their own words
BuildKit
BuildKit is a free toolkit for turning source code into build artifacts. It consists of the buildkitd daemon and buildctl client, and uses LLB, a binary format for describing process dependency graphs. Builds can use Dockerfiles or other LLB-compatible frontends, resolve dependencies concurrently, cache instructions, import and export caches, run nested jobs, and collect unused data automatically. BuildKit supports execution without root privileges and OCI (runc) or containerd workers. Results can be exported as images, local directories, tarballs, Docker tarballs, or OCI tarballs. Cache options include inline, registry, local-directory, and GitHub Actions backends; the README marks GitHub Actions, S3, and Azure Blob options experimental. The daemon provides a gRPC API over a Unix socket by default, with TCP sockets also supported. Binaries are available for Linux, macOS, and Windows. The unofficial Homebrew formula for macOS omits buildkitd; the project gives Lima in a Linux virtual machine as one way to run it. BuildKit is licensed under Apache-2.0.
Podman
Podman manages containers, pods, and images, with workflows for finding, running, building, and sharing container workloads. It is a free, daemonless container engine with a command line comparable to Docker’s CLI; most commands can run as a regular user without additional privileges. Podman Desktop adds a graphical application for installing and working with Podman and other container engines on Windows, macOS, and Linux. It can build images from Dockerfiles or Containerfiles, pull images from remote repositories, and manage accounts for pushing images to registries. Podman can run Kubernetes YAML locally, generate YAML from pods, and deploy to existing Kubernetes environments. It can find and pull containers from Docker Hub, Quay.io, internal registries, or vendors. On macOS and Windows it listens for Docker API clients. The project lists integrations including Visual Studio Code, Cirrus CLI, GitHub Actions, and kind. Podman is licensed under Apache License 2.0. Its security foundations include rootless and daemonless containers, SELinux support, network policy enforcement, and immutable containers.