Harness and Jenkins are compared in terms of their continuous integration (CI) and continuous delivery (CD) capabilities, with a focus on the transition from Jenkins to Harness for greater efficiency and cost savings. Initially, Harness was primarily a CD tool, while Jenkins was a CI tool, but over time, Harness expanded into the CI space by acquiring Drone.io and launching Harness CI Enterprise. Jenkins is recognized for its flexibility and extensive plugin ecosystem, but its maintenance demands and scalability issues can become burdensome as organizations grow. In contrast, Harness offers a streamlined setup process, reduced maintenance requirements, and robust integrations, which help companies optimize their CI/CD pipelines without the overhead associated with Jenkins. Harness emphasizes the clear distinction between CI and CD, aiming to address specific challenges in software delivery and improve operational efficiency, all while maintaining strong security and governance features.