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Buildbot vs Concourse CI: catalog facts
Buildbot	Concourse CI
Free Buildbot is free and open source under the GPL-2.0 license.	Free Free and open source.
Windows, macOS, Linux, Web, Self-hosted	Linux, Self-hosted, Command line
Runs jobs across distributed workers and platforms Supports parallel builds and flexible version control integration	Pipelines are fully defined in code Container-based tasks for reproducible builds
Requires configuring and operating a master and worker machines Workflows are defined through Python configuration scripts	Requires running your own web node, workers and PostgreSQL Its resource and job model takes time to learn
Downloadable app, Web application, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: GPL-2.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.