CircleCI vs Jenkins: Choosing The Right CI-CD Tool

So, What is Continuous Integration?

Continuous integration is a development approach where programmers merge their code into a shared repository, which is further verified by automated test and build sequences.

  • Jenkins: An open-source platform that offers you ample versatility.
  • Pipelines: Launched by Microsoft this tool is free for up to 5 users.
  • Gitlab CI: A GitLab tool which can also be combined with several other tools through the API. It is available free of cost from Gitlab.

What is Continuous Delivery (CD)?

Continuous delivery is a software development process wherein the development phase is more streamlined to allow fast and efficient deliveries to production. A successful continuous delivery method requires ensuring that it can always be in a state where it can be immediately deployed. For CD, app delivery is a regular process with no sentiment of immediacy.

Key Points to Remember While Deploying With Continuous Delivery:

There are a few points that you need to consider while deploying with the CI/CD tools. These are:

Deploy in smaller batches:

Typically, the reliability of the program is at risk any time a release happens. As a consequence, it is preferred to separate deployments from one another. Yet the trouble with this method is that we end up making a lot of changes.

Delegate Responsibility:

Continuous delivery requires a motivated workforce, as the deployment pipeline is not only a DevOps issue, there should be a collaboration between the DevOps and development team. DevOps should try solutions to support developers in order to create good quality web apps. So they’re not only trying to do the same by advising, as well as by offering all the appropriate resources that a developer may use to solve the issues.

Triggered Automation:

All of the repetitive and redundant manual tasks during each deployment can be automated. It’s hard to eliminate human errors, a lot of time developers might end up making mistakes which can’t be completely in control, by automating some of these processes can result in fewer errors.

Continuous Delivery Tools

  • Azure Pipelines
  • Jenkins
  • Gitlab CI
  • GoCD
  • Spinnaker

What Made CI/CD Inevitable For DevOps & Agile Methodology?

The introduction to CI / CD significantly improved the way programmers and software testers deliver applications. Starting with waterfall and agile the programming technology has now surfaced with DevOps. Different approaches to Continuous Integration, Continuous Development (CI/CD), and Continuous Deployment have emerged with the emergence of DevOps.

Continuous Integration With CircleCI

CircleCI is a cloud-based CI/CD tool that automates installation and delivery procedures. It offers quick configuration and maintenance without any complexities. Since it is a cloud-based CI/CD tool, it eliminates the redundancy of a dedicated server and cuts down the cost of maintenance of a constant local server host. Moreover, the cloud-based server plans are scalable, robust, and facilitate faster deployment of applications.

  • Microsoft Azure
  • AWS CodeDeploy, AWS EC2, AWS S3
  • Heroku
  • And other platforms by using SSH or configuring the API client.

Key features of CircleCI

  • It offers automated parallelism to speed up the deployment of multiple executions.
  • Quick set-up
  • Varied Customisation
  • It’s straightforward and easy to get started
  • Compact and quick to interpret setup of YAML
  • Does not require a dedicated server to operate CircleCI.
  • It caches application specifications and third-party configurations instead of system deployment.

Automating Builds With Jenkins

Jenkins is an open source CI/CD tool and an integrated development and automated deployment framework that yields higher efficiency. Jenkins is used to continuously create web applications, making it easier for developers to incorporate improvements to the code.

Key Jenkins features

  • Jenkins interacts with around all the SCM or constructs methods that currently exist.
  • Jenkins could be completely programmed from the helpful cloud Interface with robust on-the-fly bug tests and inline support.
  • In Jenkins some aspects could be expanded and updated, so it’s easy to set up fresh Jenkins extensions. This function helps you to tailor Jenkins for your requirements.
  • Jenkins is able to spread build / test loads to several machines of various platforms.

CircleCI vs Jenkins: What’s The Difference?

Now coming back to the main question, CircleCI vs Jenkins, which one is better and which one you should prefer. Rather than jumping to conclusions and stating who’s the winner in, CircleCI vs Jenkins. I’ll go through a few major points to define who’s better.

Build Control

In Jenkins, build is powered via the Jenkins UI, so all task configurations are maintained in the Jenkins system files mostly on Jenkins database, rendering it challenging to exchange setup information with the team or organisation. Github or such source servers cannot access the data contained in Jenkins.


Jenkins requires a dedicated server that needs constant maintenance by the allocated team. It further needs installation of all dependent Jenkins tools and plugins and debugging of issues.


In Jenkins debugging is a complex process as it needs manual DevOps testing and integrated team support.

User Interface

The UI of Jenkins is comparatively slower and less responsive as it loads on a local hosted server and sports a high range of plugins to deploy.

Docker Workflow

In Jenkins, developers have no built-in assistance for Docker workflow, a developer requires to install it and deliver it usable in the built-in area.

Parallel Builds

Jenkins aids several tasks by multi-threading.

Data Protection

Confidential files and encrypted data can be well protected in Jenkins servers by utilizing Jenkins plugins and credentials.

Integrating CI/CD Tools With Cloud-Based Test Automation Platform

Now that you know the answer to CircleCI vs Jenkins, let’s move ahead with how you can integrate the Selenium test automation tool with CircleCI for DevOps testing.

var capabilities = {
"build" : "your build name", //You can edit this and assign a build name
"name" : "your test name", // Assign a name to your Test
"platform" : "Windows 10", // The operating system on which you want to test your website
"browserName" : "Firefox", // The browser on which you want to test
"version" : "71.0", // The browser version which you've selected to perform the test upon
"resolution" : "1024x768", // The resolution in which you want to run the test as per your operating system
"selenium_version" : "3.11.0", //The version of Selenium on which the test will run
"visual" : true,
"firefox.driver" : v0.21.0
# Javascript Node CircleCI 2.0 configuration file
# Check for more details
version: 2
# specify the version you desire here
- image: circleci/node:7.10
# Specify service dependencies here if necessary
# CircleCI maintains a library of pre-built images
# documented at
# the working dir is github repo that you need to fork to become owner.
working_directory: ~/nightwatch-saple-for-circleci
- checkout

- run:

name: "Setup custom environment variables // its your workflow step"

command: |

echo 'export LT_USERNAME="{the_lambdatest_username}"' >> $BASH_ENV

- run:

name: "Setup custom environment variables"

command: |

echo 'export LT_ACCESS_KEY="{the_lambda_access_key}"' >> $BASH_ENV

- run: # Validating your above mentioned environment variables

name: "Here is the LT_Username : "

command: echo ${LT_USERNAME}

# Download and cache dependencies

- restore_cache:


- v1-dependencies-{{ checksum "package.json" }}

# fallback to using the latest cache if no exact match is found

- run: npm install

# run tests!

- run: node_modules/.bin/nightwatch -e firefox // Executing test in bash.
$ node_modules\.bin\nightwatch -e firefox

Wrapping It Up!

In conclusion, the key difference between CircleCI vs Jenkins is that Jenkins is more secure and elaborates; CircleCI is lightweight and open. Therefore for faster deployment jobs, one can execute their codes on CircleCI as it deploys on scalable and robust cloud servers. These days CircleCI is a more preferred CI/CD tool and is used widely across the technology industry. Hence, with CircleCI you can deploy code in a reliable manner and by integrating with cloud Selenium grid-like LambaTest you can perform continuous testing in a more scalable manner, also ensuring a faster go-to-market launch.



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