Difference Between Jenkins vs CircleCI
Jenkins is a continuous integration and continuous deployment server developed in Java language. Jenkins is a cross-platform and leading award-winning continuous integration automation tool with main goals as building and testing software continuously and monitoring execution of jobs running externally. CircleCI is a continuous integration tool being used by software development teams to build, test, and deploy applications quicker and easier on different platforms. CircleCI supports all types of software tests including web, mobile, desktop and container environments.
What is Jenkins?
Continuous integration means triggering the collection of tests on non-developer machines whenever someone pushes code into any component of the software or SDK source repository. Jenkins offers continuous integration services for almost any combination of languages and source code repositories using pipelines. Its open-source and extension capability are the main reasons for its success. Jenkins was developed in 2004 and initially, called Hudson later in 2011 renamed to Jenkins due to disputes with Oracle. Jenkins has 1200+ plugins available for extension of Jenkins functionality. Jenkins is used by a variety of companies some of them are Facebook, Sony, Netflix, Tumblr, Yahoo, eBay, etc. Jenkins comes with easy installation, configuration, rich plugin availability, extensibility, and distributed builds to different computers.
What is CircleCI?
CircleCI provides easy setup and maintenance without any difficulties. It is a cloud-based system, which means no dedicated server is required and no need to maintenance/administration of server which has a free plan even for business accounts. CircleCI can be integrated with GitHub, Amazon EC2, Appfog, dotCloud, etc. and used by many companies such as Facebook, Spotify, Kickstarter, RedBull, Harvest, and Teespring, etc. CircleCI attributes such as Github integration, fast builds, easy setup, slack integration, Docker support, and great customer support are most emphasized by community members. CircleCI comes with following features such as quick setup, deep customization, smart notifications, fast support, and automatic parallelization. It caches requirements installation and third-party dependencies instead of the installation of the environments.
Head to Head Comparison Between Jenkins and CircleCI (Infographics)
Below is the top 7 difference between Jenkins and CircleCI:
Key Differences Between Jenkins and CircleCI
Both Jenkins vs CircleCI are popular choices in the market; let us discuss some of the major Difference Between Jenkins and CircleCI:
- Jenkins can supports multiple jobs by multi-threading whereas CircleCI has inbuilt support for parallelism which can be achieved by project settings.
- In Jenkins, builds are configured using web UI with settings stored in Jenkins server whereas, in CircleCI, jobs can be built using “circle.yaml” file.
- CircleCI has the best feature for debugging “Debug via SSH” which makes debugging easier whereas Jenkins we need to manually debug by clicking on Jobs.
- CircleCI changes environment without warning which is an issue whereas, in Jenkins, it will change only when the user instructs.
- In Jenkins, we can cache Docker images using a private server whereas in CircleCI we can’t cache the Docker images.
- In Jenkins, secrets will be encrypted using Jenkins credentials and Plugin whereas, in CircleCI, we don’t have security like Jenkins.
Jenkins and CircleCI Comparison Table
The primary Comparison between Jenkins and CircleCI are discussed below:
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| The Basis of Comparison Between Jenkins vs CircleCI |
Jenkins |
CircleCI |
| Build Configuration | In Jenkins, Builds are configured using Jenkins UI and all settings of the jobs are stored on the Jenkins file system in Jenkins server which makes it difficult to share configuration details with team or organization. By cloning Github or other source repositories can’t copy info stored in Jenkins. | In CircleCI, we can build all jobs within a single file called “circle.yaml”. It is easy as CI configuration will be like any other source code repos which make it easy to share and backup. On CircleCI only a few settings like secrets will be stored in encrypted format. |
| Build Machines Access | In Jenkins, DevOps person or team need to maintain the Jenkins server by installing all dependencies and debug if any issues are there. Debugging will be a little bit difficult in Jenkins. | In CircleCI, we don’t need to maintain the server as every job will be started in a new environment where all the dependencies will be installed by default. Troubleshooting in it will be easy due to its ssh feature. DevOps team can do whatever they need on host os without effecting builds where developers can debug using its ssh feature. |
| Web UI | Jenkins web UI was originally developed in a different landscape of web technology which is still fairly dated. In it, every page load will need to render completely by the server which makes navigation experience little slow and clumsy process. Web UI becomes slow or less responsive due to more number of plugins. | In CircleCI, Web UI is a single page web application which is developed using AJAX, HTML5 and new technologies to make user experience fast and easy to use. CircleCI web UI will be changed frequently with improvements which makes it popular among users. |
| Plugins | In Jenkins, Plugins plays an important role as we will be using plugins for most of the tasks such as if we want to check out Git repo we need GitHub plugin. These plugins are developed in Java which can be integrated with a number of plugins which generates web view in JSP pages. | In CircleCI, almost all core functionality is built-in like checking out the source code from GitHub or Bitbucket, running jobs, storing artifacts, and parsing the output without any plugins. We can develop shell scripts to add any functionality as we required. |
| Containers and Docker | In Jenkins, we don’t have built-in support for Docker workflow, the user needs to install and make it available in the built environment. | In CircleCI, we have built-in support for Docker in workflow, which can be accessed by adding in services section in “circle.yaml” file. |
| Parallelism | In Jenkins, we can run multiple jobs or tests at a time using multi-threading but it may cause issues related to database and file systems which will be difficult to debug. | In CircleCI, It has the inbuilt facility to support parallelism which can be done by changing project settings- using multiple containers at once. |
| Environment Change | In Jenkins, the environment will change with user permission and gives a warning if it changes. | In CircleCI, the environment will change without any warning which leads to debugging more number of days. |
Conclusion
Finally, it’s an overview of the comparison between Jenkins vs CircleCI. I hope you will have a better understanding of CircleCI vs Jenkins automation tools and use as per your project requirements and cost. We have seen the positives and negatives of CircleCI vs Jenkins – one can decide which tool to use based on project requirements such as budget, timeline, and other parameters.
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