Alternatives to: Jenkins

Solutions

Buildbot

Python-based continuous integration testing framework
Forgejo Runner

A daemon for running continuous integration jobs within a Forgejo instance.
Gitea Runner

Gitea Runner is a versatile, self-hosted runner for executing Gitea Actions workflows.
GitLab Runner

GitLab Runner is an Open Source project that executes GitLab CI/CD jobs and sends results back to GitLab.
Woodpecker

Woodpecker is a simple, yet powerful and extensible Open Source CI/CD engine.