Concourse CI vs TeamCity
A side-by-side comparison of two self-hosted ci/cd & build options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Concourse CI | TeamCity |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Category | CI/CD & Build | CI/CD & Build |
| License | Apache-2.0 | Proprietary |
| Language | Go | Java |
| Setup difficulty | Hard | Medium |
| Min. RAM | 2,048 MB | 4,096 MB |
| Deployment | docker, kubernetes, helm | docker, bare-metal |
| GitHub stars | ★ 7,906 | — |
| First released | 2014 | 2006 |
| Replaces | Jenkins, CircleCI | Jenkins, CircleCI |
What are Concourse CI and TeamCity?
Concourse CI
Concourse is an open-source CI/CD system built around the principles of declarative pipelines and reproducible builds. Every task runs in an isolated container for consistent, debuggable builds.
- Declarative YAML pipelines
- Container-isolated tasks
- Visual pipeline graph
- Resource-based design
TeamCity
TeamCity is a build management and continuous integration server from JetBrains. The Professional edition is free for self-hosting smaller teams and supports many build runners and VCS systems.
- Smart build configuration
- Build chains and dependencies
- Rich VCS integration
- Detailed test reporting
Concourse CI vs TeamCity: key differences
Concourse CI is written in Go, while TeamCity is built with Java. Licensing differs — Apache-2.0 for Concourse CI versus Proprietary for TeamCity. Concourse CI is the lighter option, starting around 2,048 MB of RAM against 4,096 MB for TeamCity. TeamCity is the more established project (first released 2006), while Concourse CI arrived in 2014.
Why pick each one
Choose Concourse CI if…
- Reproducible builds
- Strong isolation
Watch out for
- Steep learning curve
Choose TeamCity if…
- Released under the Proprietary license
- First-class Docker support for quick deployment
- Written in Java
Frequently asked questions
Is Concourse CI or TeamCity better?
Neither is universally better. Concourse CI has the larger community, while TeamCity is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Concourse CI and TeamCity free and open-source?
Yes. Concourse CI is licensed under Apache-2.0 and TeamCity under Proprietary. Both can be self-hosted at no software cost.
Can I run Concourse CI and TeamCity with Docker?
Concourse CI: yes. TeamCity: yes.
Which is lighter on resources, Concourse CI or TeamCity?
Concourse CI has the smaller minimum footprint at 2,048 MB of RAM, compared to about 4,096 MB for TeamCity. Real-world usage depends on library size, user count, and enabled features.