Power, flexibility, and control
More speed and configurability than ever before with customizable pipelines.
How CircleCI Works
VCS integration
CircleCI integrates with GitHub, GitHub Enterprise, and Bitbucket. Every time you commit code, CircleCI creates a pipeline.
Automated testing
CircleCI automatically runs your pipeline in a clean container or virtual machine, allowing you to test every commit.
Notifications
Your team is notified if a pipeline fails so issues can be fixed quickly. Automate notifications with our Slack integration.
Automated deployment
Passing pipelines are deployed to various environments so your product goes to market faster.
Faster performance
Get the speed and reliability you need when building, testing, and deploying code. Choose the resources you need for optimal performance.
Complete control
Build software your way using custom job orchestration with workflows. Enable dynamic config to set pipeline parameters, generate config, and more.
Unparalleled flexibility
Run jobs on Linux, MacOS, or Windows, in our cloud or on your own infrastructure, with access to first-class Docker support.
Everything great teams need
Flexible job orchestration
Enable dynamic config to gain increased control and flexibility over your development process. Define and orchestrate how job execution (such as build, test, deploy) is run using multiple supported configurations.
First-class Docker support
Run any image from Docker’s public/private registry or other common registries, customizable on a per-job basis. Build Docker images, access Docker layer caching, Compose, and more.
Choose the CPU/RAM you need
Easily configure your compute and memory to fit your team’s specific pipelines. Choose resources that give you optimal performance and increase speed.
Language-agnostic support
CircleCI supports any language that builds on Linux, Windows, or macOS, including C++, Javascript, .NET, PHP, Python, and Ruby. You are free to use any toolchain, framework, or version you want.
See language guides and tutorials.
Powerful caching
Speed up your pipelines with expanded caching options, including images, source code, dependencies, and custom caches. Gain control over cache save and restore points throughout your jobs for optimal performance.
SSH or run local builds for easy debugging
Quickly find and solve problems using SSH access or run jobs in your local environment to ensure faster remediation of issues. Find and solve bugs where they happen for fast recovery.
Learn how to debug with SSH and with the CircleCI CLI.
Unmatched security
The controls you need to be confident your code is protected. Host in our cloud or on your own infrastructure, LDAP for user management, full-level virtual machine isolation, and more.
Insights dashboard
Realize the full value of CircleCI with the Insights dashboard. Track status, monitor duration, detect flaky tests, and optimize pipelines with ease.
Execution Environments
Build anything on CircleCI
Save time and resources by using our comprehensive, customizable fleet of CI/CD machines, including Docker containers and VMs for Linux, macOS, Windows, and Arm. For additional control and platform support, create custom execution environments on your own infrastructure.
Integrations
Works with your toolchain
CircleCI connects with services you already use like AWS, Fastlane, Azure, and Slack.
Migrate from Jenkins
It’s easy to switch to CircleCI
Join the thousands of companies who have made the switch from Jenkins to CircleCI.
“We successfully migrated both repos and see phenomenal performance improvements, especially when we leverage caching! Our project’s build times went from roughly 2:30 minutes to 1:30 (without cache) and 0:50 (with cache).”
“Today’s experience on @circleci 2.0: my setup was so fast I had to explicitly wait for elasticsearch to start properly before running tests.”
via @BlameFrost
“Build time dropped from 13 minutes to just over 2 minutes after moving to @circleci 2.0 and enabling caching. Great end to the week!”
via @qnmco
“Workflows + Docker caching are great with CircleCI. I’m pumped about what we can do with this! Our Docker build times have gone from ~12 minutes to less than 2 minutes on CircleCI. Fan-freaking-tastic.”
Josh Dover
Senior Software Engineer at CrateJoy
“I wasn’t convinced Jenkins was worth the effort. With CircleCI there were none of the headaches I’d experienced before. Everyone who joins our team picks up CircleCI very quickly. It’s always a positive experience.”
Rob Eanes
CTO at Pingboard
Confidence in every commit
Our purpose-built CI/CD platform
delivers speed and reliability —
in the cloud or on your private infrastructure.
Accelerate your team’s delivery
Get enterprise-level speed and security. See why the world's best engineering teams choose CircleCI as their automation engine.
Automate builds across multiple environments
The compute options your team needs to build how and where you want.
Resource classes
Easily configure CPU and memory for optimal performance and increased speed.
Improve developer productivity
CircleCI was built by DevOps professionals to help you fine-tune your entire development process from start to finish.
Connect best-in-class tools
Choose from thousands of existing integrations or create your own.
Pre-built integrations
Use orbs to add pre-packaged config for third-party services like Slack, AWS, and Terraform to your CircleCI pipelines.
Webhooks
CircleCI webhooks enable developers to create customizable integrations with workflow-level and job-level events.
API
Our full-featured RESTful API allows you to access all information and trigger actions in CircleCI.
Secure your pipeline
We ensure that your projects are built, deployed, and maintained securely.
Industry-leading protection
We are the only CI/CD tool to meet the rigorous standards of FedRAMP, in addition to being SOC 2 Type II compliant.
Clean execution environments
Your jobs automatically run in a clean container or virtual machine, giving you control of the environment.
It’s easy to switch to CircleCI
Our support team takes you through the whole process of migrating from Jenkins or any other CI/CD provider.
Leading engineering teams trust CircleCI
to solve their toughest challenges.
“CircleCI is the hub, and the brain of our global automation.”
“CircleCI is both the fastest and the easiest CI I’ve used to date.”
“With CircleCI’s flexible caching capabilities we were able to increase concurrency, deliver value faster, and our feedback loop was faster.”
“CircleCI’s CI application spins up, builds fast, and fits based on each team’s use case. Compared to others, it’s much more flexible for testing and incredibly easy to use for integrations.”
