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What is CircleCI?

Continuous integration and delivery platform helps software teams rapidly release code with confidence by automating the build, test, and deploy process. Offers a modern software development platform that lets teams ramp.

What is

Simply upload your Dockerfile (and any additional files it needs) and we'll build your Dockerfile into an image and push it to your repository.

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In a nutshell Jenkins CI is the leading open-source continuous integration server. Built with Java, it provides over 300 plugins to support building and testing virtually any project.
Travis CI
Free for open source projects, our CI environment provides multiple runtimes (e.g. Node.js or PHP versions), data stores and so on. Because of this, hosting your project on means you can effortlessly test your library or applications against multiple runtimes and data stores without even having all of them installed locally.
Codeship runs your automated tests and configured deployment when you push to your repository. It takes care of managing and scaling the infrastructure so that you are able to test and release more frequently and get faster feedback for building the product your users need.
Azure DevOps
Azure DevOps provides unlimited private Git hosting, cloud build for continuous integration, agile planning, and release management for continuous delivery to the cloud and on-premises. Includes broad IDE support.
Concourse's principles reduce the risk of switching to and from Concourse, by encouraging practices that decouple your project from your CI's little details, and keeping all configuration in declarative files that can be checked into version control.
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Reviews of CircleCI and
Review ofCircleCICircleCI

I use CircleCI as part of a cross platform mobile app to build and test the app as well as deploying .apk files to an s3 bucket.

Alongside CircleCI this repo also has a TravisCI setup for iOS. The CircleCI build has always been quicker and since moving from CircleCI v1 to CircleCI v2 it blows the TravisCI build out of the water. I'm really impressed with the performance gains from moving to v2. I'm pretty sure I could achieve similar results in Travis as well, but it was really easy to setup the Android CI build in Circle making use of Docker.

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VP of Engineering at Jetpack Workflow
Review ofCircleCICircleCI

After trying several CI systems, we stuck with CircleCI because of the inference engine in CircleCI 1.0 made setup a breeze. We were up and running quickly. Builds are reliable, nicely integrated into GitHub, and anytime we've had a question, the support team was there to help. The 2.0 system provides Docker support and far more customization and is still fairly easy to set up with helpful documentation.

Review ofCircleCICircleCI

CircleCI has become our CI of choice. The UI is really good and it has all the integrations we need. The 2.0 upgrade was not yet possible for one of our projects due to outdated gems, however, I have been able to get it working for a different one.

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Information Technology
Review ofCircleCICircleCI

It help us with the automated build and test and also provide us with the build artifacts which we can use for the deployment also give use archive for each of our build, this things save us alot of time and cost

Review ofCircleCICircleCI

We use CircleCI to deploy to server. It is much easier than other websites like Travis especially for the free tier. It is especially useful for open source projects that need private access behind the scenes.

How developers use CircleCI and
Avatar of AngeloR
AngeloR uses CircleCICircleCI

We originally used CircleCI as our self-contained build system for our internal node modules. It was very easy to set up and configure. Unfortunately we ended up stepping away from it to Jenkins and then CodePipeline due to better integration with our various applications.

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Jeff Flynn uses CircleCICircleCI

We prefer CircleCI because we care about testing our apps. We found it is better to invest the time writing rSPEC tests to ensure we don't insert any regression bugs with new branches. It's also nice to have a fully-automated deployment process from GitHub to Heroku.

Avatar of Matt Welke
Matt Welke uses CircleCICircleCI

Used for CI/CD for all proofs of concept and personal projects, because of ease of use, GitHub integrations, and free tier.

Also used for example repos hosted in GitHub, paired with Dependabot, so that example repo dependencies are kept up to date.

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Marc3842h uses CircleCICircleCI

CircleCI is used as continues integration system for shiro and all of its modules.

It automatically deploys the latest GitHub commit to

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jasonmjohnson uses CircleCICircleCI

CircleCI will be used for deployment and continuous integration using a scripted configuration that deploys to Amazon EC2.

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