How CircleCI Works
CircleCI integrates with GitHub, GitHub Enterprise, and Bitbucket. Every time you commit code, CircleCI creates a pipeline.
CircleCI automatically runs your pipeline in a clean container or virtual machine, allowing you to test every commit.
Your team is notified if a pipeline fails so issues can be fixed quickly. Automate notifications with our Slack integration.
Passing pipelines are deployed to various environments so your product goes to market faster.
Everything great teams need
Flexible job orchestration
First-class Docker support
Choose the CPU/RAM you need
SSH or run local builds for easy debugging
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.
“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.”
“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!”
“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.”
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.”
CTO at Pingboard
Confidence in every commit
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.
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.
Secure your pipeline
We ensure that your projects are built, deployed, and maintained securely.