Open-source Buddy alternatives

Harness Open Source is a developer platform written in Go that bundles source code hosting, automated pipelines, hosted development environments and artifact registries in one product. The idea is to give a team a complete, self-run DevOps toolchain rather than separate services for repositories, builds and package storage.

Its hosted development environments are called Gitspaces, and the platform also includes registries for build artifacts. Harness is presented as the next generation of Drone: Drone focused only on continuous integration, whereas Harness adds code hosting and developer environments. The maintainers say the goal is eventual parity with Drone's pipeline capabilities so users can migrate, and a snapshot of Drone lives on a separate branch so it can keep developing.

You can run Harness locally from the published Docker image and open it on port 3000. The image stores its database and repositories in a volume, so a bind mount or named volume is strongly recommended to avoid losing data when the container stops. The project is Apache-2.0 licensed, with documentation at developer.harness.io.

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.

OneDev is a self-hosted platform that gathers Git hosting, issue tracking, pull requests, CI/CD, packages, a wiki and workspaces in one place. It is described as unified and autonomous, with AI teammates available to help with development work. The team develops OneDev on its own instance at code.onedev.io, where issues and pull requests are submitted.

The feature set emphasizes code review and quality. There is language-aware symbol search and navigation within any commit, fast code search with regular expressions, a Renovate integration that updates dependencies through pull requests which can merge automatically after approval or passing tests, and code annotated with coverage and problems found in the CI/CD pipeline. Discussions can be started on any code selection or diff and stay attached to the code, and versatile protection rules can require reviews or CI verification when particular users change particular files on particular branches. Topics also mention kanban boards.

OneDev is written in Java and licensed under MIT. You host it yourself, which suits teams wanting an all-in-one alternative to stitching together GitHub-like hosting, CI and project tools. Tutorials and demos on the project site show features such as dependency updates and protection rules in action.

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.

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.

CDS, the Continuous Delivery Service, is an enterprise-oriented continuous delivery and DevOps automation platform written in Go and developed by OVH. It lets teams model build, test and deployment processes as workflows and run them across their infrastructure.

The platform offers a UI where complex workflows can be built, started and inspected down to the logs, and a command-line client called cdsctl that can script everything and includes commands such as a shell for browsing projects and workflows without a browser. Workflows can also be defined as code, according to the README, and the project is described as under active development with published documentation.

CDS is licensed under BSD-3-Clause and is self-hosted by organizations that want to run their own CI/CD platform. It suits platform engineering teams looking for an open, scriptable alternative to commercial pipeline tools.

bk-ci, also called Blueking Continuous Integration (蓝盾), is a free and open-source CI service for automating build, test, and release workflows. It handles compiling, static code analysis, running tests to catch bugs early, and deployment and release. The documentation is available in Chinese and English, and the input lists its license only as other. It is written in Kotlin and Java.

The platform is described as eight core services: pipelines that visualize a team's development process, code checking powered by BK-CodeCC, a code repository service that links existing source hosting, credential management, environment management for build machines, a store of pipeline plugins and templates, compile acceleration for C/C++ and Unreal Engine builds, and an artifact repository supporting formats such as Maven, npm, PyPI, Docker, Helm, and NuGet on COS or S3 storage. A cloud desktop service is also listed.

The README warns that the master branch can be unstable and that users should install from releases. bk-ci suits enterprises, particularly Chinese-speaking teams and game studios, that want a self-managed CI platform covering pipelines, artifacts, and build acceleration.

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.