Jenkins and Docker are two entirely different applications or concepts, so they are different in all respects. Jenkins is a continuous integration engine that can execute, develop and test on an application, while Docker, a container engine, helps build and manage containers. Jenkins was initially used as a build app for Java applications but is now used as an automated software testing application. At the same time, Docker helps develop and execute several portable environments on the same software stack. You can create and manage several pipelines for continuous integration and continuous development using the simple interface of Jenkins. And you can create images and run Docker containers using CI/CD pipelines of Jenkins for quality assurance.