Open-source Bamboo alternatives

Jenkins is an open-source automation server written in Java. Teams use it to automate parts of their development workflow, including building projects, running tests to catch bugs early, performing static code analysis and deploying software. The README states that more than 2,000 plugins extend it to automate nearly any task. It is released under the MIT license, and its topics include continuous integration, delivery and pipelines as code.

The project distributes official downloads as WAR archives, Docker images, and native packages or installers for several Linux distributions and Windows. Two release lines exist: weekly releases carrying all new features and fixes, and Long-Term Support releases that receive periodic backported bug fixes. The repository links to contributing guidelines, good first issues, developer documentation, governance and adopters information. As a self-managed server, you operate and secure your own Jenkins instance.

Concourse is an automation system written in Go, most often used for CI/CD and built to scale from simple to complex pipelines. It is deliberately opinionated: the project emphasizes idempotency, immutability, declarative configuration, stateless workers and reproducible builds.

It is distributed as a single concourse binary on the releases page, and other supported formats include a Docker image, a Kubernetes Helm chart and a BOSH release. A quick start walks through running it locally. Topics show that tasks run in containers using containerd and runc, and the web interface was built with Elm.

Concourse is licensed under Apache-2.0. It is run on your own infrastructure by teams that prefer pipelines described as code, with each job's inputs and outputs explicit, over scripts configured through a UI. It suits platform and DevOps teams wanting repeatable, container-isolated build and deploy pipelines.

GoCD is a continuous delivery server that helps automate and streamline the build, test and release cycle so that software can be delivered continuously with fewer worries. The repository is the project's main code base, and the project is sponsored by Thoughtworks.

Newcomers can use the Test Drive GoCD page to build a first pipeline while learning the key concepts, download releases from the website and read the documentation for detailed help. It is predominantly a Java and TypeScript project that uses the Spring Framework, SparkJava and MithrilJS, is built with Gradle and Webpack and runs inside Eclipse Jetty, with a few older parts rendered server-side in JRuby on Rails. GoCD itself is built with GoCD.

The security policy explains how issues are reported, and contributing guides cover the development environment. GoCD is licensed under Apache-2.0 and is hosted by you. It suits teams that model deployment pipelines with explicit stages and dependencies across several services.

Buildbot is an open-source continuous integration framework written in Python. Rather than a fixed service with a rigid workflow, it is a toolkit for automating the whole software development cycle, from compiling and testing code to packaging and releasing it, with configuration expressed in Python.

The project's site presents it as a framework with batteries included, covering automated build, test and release jobs, a web interface, and a tutorial and documentation to get started. A master process coordinates build workers that can run on different platforms, which makes it a good fit for projects that need to test across many operating systems and configurations. The site also lists success stories and a Metabuildbot used to build Buildbot itself.

Buildbot is licensed under GPL-2.0 and is typically self-hosted, with community support through a mailing list and IRC. It suits teams that want a highly customizable CI system they control, particularly for complex or multi-platform build setups.

PHP Censor is a self-hosted continuous integration server built for PHP projects. It is a fork of PHPCI and lets teams automatically fetch code, install dependencies, run tests and quality checks, and send notifications about the results from a server they control.

Projects can be cloned from GitHub, Bitbucket, GitLab, generic Git, Mercurial, Subversion or a local directory. Builds can set up database tests for PostgreSQL, MySQL and SQLite, install Composer dependencies, run PHPUnit, Atoum, Behat, Codeception and PHPSpec, and apply linting and static analysis tools such as PHP CodeSniffer, PHP Mess Detector and PHPLoc. Plugins such as Deployer, Phing, Grunt and Gulp are included, along with notifications to email, Slack, IRC and Telegram, and LDAP authentication.

The server needs a Unix-like OS, PHP 7.4 or newer, Nginx or Apache, a MySQL, MariaDB or PostgreSQL database and a Beanstalkd queue; Windows is not supported. It is released under the BSD-2-Clause license, with version 2.1 as the current stable line.

flow.ci is an open-source CI/CD automation server built for teams that want to set up self-hosted continuous integration and delivery with minimal configuration. It is designed to run on public, private or hybrid cloud infrastructure, supporting deployment across multiple instances so job and configuration data is not lost if a single instance fails.

It features auto-scaling build agents on Kubernetes or a plain Linux host, parallel execution of job steps across multiple agents, build caching to speed up pipelines, an online TTY terminal for debugging a running job in real time, and a plugin system where plugins can be written in any language and simply referenced by name in a pipeline step. Each step or step group can run on any Docker image or directly on the native OS, and the server can be started with just three commands alongside ready-made build templates for languages such as Maven, npm, Go, Ruby and Android.

flow.ci is written in Java, requires Docker and Docker Compose, and is released under the Apache-2.0 license. Documentation is available in English and Chinese, with support offered through issues and email.