Jenkins is a self-contained Java-based program, ready to run out-of-the-box, with packages for Windows, Mac OS X and other Unix-like operating systems. Developed by R.Tyler Croy
License: Open Source
Semaphore is designed for ease of use and quick setup, making it ideal for smaller teams and simpler projects. In contrast, Jenkins offers extensive customization and flexibility, which is beneficial for larger teams and complex CI/CD workflows.