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
JetBrains TeamCity offers a more integrated environment with JetBrains tools and advanced features, while Jenkins is a widely adopted open-source tool with a large community and extensive customization options. TeamCity may be better suited for teams already using JetBrains IDEs, while Jenkins is ideal for those seeking flexibility and a broad range of integrations.