Buildkite Agent vs Dagger
A side-by-side comparison of two self-hosted ci/cd & build options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Buildkite Agent | Dagger |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 83 · Excellent | 95 · Excellent |
| Category | CI/CD & Build | CI/CD & Build |
| License | MIT | Apache-2.0 |
| Language | Go | Go |
| Setup difficulty | Medium | Medium |
| Min. RAM | 256 MB | 1,024 MB |
| Deployment | docker, binary, bare-metal | docker, binary |
| GitHub stars | ★ 1,078 | ★ 16,298 |
| First released | 2014 | 2022 |
| Replaces | GitHub Actions, CircleCI | GitHub Actions, CircleCI |
What are Buildkite Agent and Dagger?
Buildkite Agent
The Buildkite Agent is an open-source build runner that executes pipeline jobs on your own machines while Buildkite coordinates orchestration. It lets teams keep build infrastructure private and scalable.
- Runs builds on your own hardware
- Cross-platform agent
- Parallel job execution
- Artifact handling
Dagger
Dagger is an open-source CI/CD engine that lets developers define pipelines as code in their preferred language and run them anywhere with a containerized engine. It can be self-hosted to power portable build pipelines.
- Pipelines as code
- Runs anywhere with containers
- Multi-language SDKs
- Built-in caching
Buildkite Agent vs Dagger: key differences
Both projects are written in Go. Licensing differs — MIT for Buildkite Agent versus Apache-2.0 for Dagger. Buildkite Agent is the lighter option, starting around 256 MB of RAM against 1,024 MB for Dagger. Buildkite Agent is the more established project (first released 2014), while Dagger arrived in 2022. Dagger has the considerably larger community, at 16,298 GitHub stars versus 1,078.
Why pick each one
Choose Buildkite Agent if…
- Released under the MIT license
- First-class Docker support for quick deployment
- Active community (1.1k GitHub stars)
- Written in Go
Choose Dagger if…
- Pipelines as real code
- Runs identically anywhere
- Container-level caching
Watch out for
- New concepts to learn
- Container runtime required
Frequently asked questions
Is Buildkite Agent or Dagger better?
Neither is universally better. Dagger has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Buildkite Agent and Dagger free and open-source?
Yes. Buildkite Agent is licensed under MIT and Dagger under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Buildkite Agent and Dagger with Docker?
Buildkite Agent: yes. Dagger: yes.
Which is lighter on resources, Buildkite Agent or Dagger?
Buildkite Agent has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for Dagger. Real-world usage depends on library size, user count, and enabled features.