Open-source Travis CI 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.

Woodpecker is a simple CI/CD engine with a plugin system for extending what pipelines can do. It can be installed in several ways, including Docker and Kubernetes, and runs with SQLite as the default database, so a small setup needs little more than a server and one or more agents.

The README says the server needs around 100 MB of memory and the agent about 30 MB when idle, which makes it suitable for modest hardware. Plugins are browsed on a dedicated overview website and include both core-team and community-maintained ones. Translations are managed on a self-hosted Weblate instance, and the project is supported through Open Collective and GitHub Sponsors.

Woodpecker is written in Go and licensed under Apache-2.0, with documentation under Creative Commons Attribution-ShareAlike. Codeberg, a Git hosting platform focused on privacy and free software, uses it as its main CI/CD engine. It suits teams and individuals who self-host Git and want a lean container-based pipeline runner.

Semaphore is a continuous integration and delivery platform that helps product teams build, test and ship software. Pipelines are defined in YAML, can run jobs in parallel, and work with containers, Kubernetes and multi-cloud environments. The project presents it as a delivery platform for AI-driven development as well as traditional workflows.

The code base is written mainly in Elixir and Go, and the repository describes three flavors. The Community Edition is free and open source under Apache 2.0 and meant for teams running Semaphore on their own infrastructure with community support. The Enterprise Edition adds features for larger organizations under a commercial licence with professional support. Semaphore Cloud is the hosted option at semaphoreci.com.

Installing the self-hosted version is said to take roughly 10 to 30 minutes, with detailed guides for different methods, and the repository links to documentation, a roadmap, governance information and a project board. It suits engineering teams that want a modern CI/CD system they can run themselves, or prefer a hosted service with the same engine.

Abstruse is a free and open-source continuous integration and delivery platform. It runs tests and builds for your code on infrastructure you operate, using Docker to isolate jobs, and reports results through a web interface.

Version 2 is a rewrite in Go; the 1.x line was based on Node.js. By default it runs as a single-node cluster with a server and a configurable number of workers, and the cluster can be extended with additional nodes when more capacity is needed. A quick-start Docker setup launches the abstruse-server, one abstruse-worker and a MySQL database, followed by a browser-based installation wizard.

Abstruse is licensed under MIT and is self-hosted. A live demo is available with a read-only user, so you can look around before installing. Building from source requires Node.js, yarn and Go, and the project describes itself as lightweight compared with a typical CI server.

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.