1. [Home](https://www.g2.com/) 2. ... 3. [Continuous Integration Tools](https://www.g2.com/categories/continuous-integration) 4. [CircleCI Discussions](https://www.g2.com/products/circleci/discuss) [ ![Product Avatar Image](https://images.g2crowd.com/uploads/product/image/large_detail/large_detail_f12938338549ef6246b98aaa6418267e/circleci.png "Product Avatar Image") ](/products/circleci/reviews) [ CircleCI ](/products/circleci/reviews) (509)4.4/5 CircleCI is the worlds largest shared continuous integration and continuous delivery (CI/CD) platform, and the central hub where code moves from idea to delivery. As one of the most-used DevOps tools that processes more than 1 million builds a day, CircleCI has unique access to data on how engineering teams work, and how their code runs. Companies like Spotify, Coinbase, Stitch Fix, and BuzzFeed use us to improve engineering team productivity, release better products, and get to market faster. Show More * * * ### 56.0 Nps Score Already have CircleCI? ### All CircleCI Discussions Search Most CommentedMost HelpfulPinned by G2Newest All DiscussionsDiscussions with CommentsPinned by G2Discussions without Comments FilterFilter Filter byExpand/Collapse Sort by Most Commented Most Helpful Pinned by G2 Newest Filter by All Discussions Discussions with Comments Pinned by G2 Discussions without Comments ![Verified User in Computer Software](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Computer Software") G2 Verified User in Computer Software • over 9 years ago Posted by CircleCI Posted by CircleCI More Options - [ # How many containers do I need? ](/discussions/getting-started-c9085f24-0f26-473d-97b4-d2cd26593061) Getting Started [ Continuous Integration Tools ](https://www.g2.com/tags/continuous-integration-tools)[ Continuous Deployment Software ](https://www.g2.com/tags/continuous-deployment-software)[ Build Automation Software ](https://www.g2.com/tags/build-automation-software) * * * \<0\>0\>Upvotes * * * 1 Comment [![linkedin](/assets/social-logos/linkedin-afe65e46604a5bd5105ab9c856116204040b6b3f2b2d42562fc8071ca0c48ca0.svg "linkedin")](https://www.linkedin.com/shareArticle?mini=true&summary=Ask+CircleCI+questions+and+get+answers+from+expert+users+in+our+CircleCI+Discussions+section.&title=CircleCI+Discussions+%7C+G2&url=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2) [![twitter](/assets/social-logos/twitter-61aaec80434c71387b8f7326e480592eae71c0a65afd051d66fce9b75a9bf417.svg "twitter")](https://twitter.com/intent/tweet?text=CircleCI+Discussions+%7C+G2&url=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2&via=G2dotcom) [![facebook](/assets/social-logos/facebook-350d0b410d6b10debcf893050e803a8633d53561aa42807b087b8daf9be3668f.svg "facebook")](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2) [![gmail](/assets/social-logos/gmail-6db42f21e7c254fae201b112bef0dd15d25223a5cbb32691ce80eab43761eadf.svg "gmail")](https://mail.google.com/mail/?view=cm&fs=1&tf=1&to=&su=CircleCI+Discussions+%7C+G2&body=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2%0aAsk+CircleCI+questions+and+get+answers+from+expert+users+in+our+CircleCI+Discussions+section.) [![mail](/assets/social-logos/mail-d55c53b04bf49872e40cd2443b85a99caa23394e6cf154ae32a9d08377c15d86.svg "mail")](mailto:?subject=CircleCI+Discussions+%7C+G2&body=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2%0aAsk+CircleCI+questions+and+get+answers+from+expert+users+in+our+CircleCI+Discussions+section.) ![copy_link](/assets/social-logos/copy_link-05d8dc5dc8576fc78425ad34d07241b060878835e555a30417ff41c18335e575.svg "copy\_link") ![Verified User in Computer Software](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Computer Software") G2 Verified User in Computer Software • over 9 years ago Posted by CircleCI Posted by CircleCI More Options - [ # How do containers work? ](/discussions/getting-started-6fb874cf-9d1a-4759-abe2-ea63c3b70880) Getting Started [ Continuous Integration Tools ](https://www.g2.com/tags/continuous-integration-tools)[ Continuous Deployment Software ](https://www.g2.com/tags/continuous-deployment-software)[ Build Automation Software ](https://www.g2.com/tags/build-automation-software) * * * \<0\>0\>Upvotes * * * 1 Comment [![linkedin](/assets/social-logos/linkedin-afe65e46604a5bd5105ab9c856116204040b6b3f2b2d42562fc8071ca0c48ca0.svg "linkedin")](https://www.linkedin.com/shareArticle?mini=true&summary=Ask+CircleCI+questions+and+get+answers+from+expert+users+in+our+CircleCI+Discussions+section.&title=CircleCI+Discussions+%7C+G2&url=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2) [![twitter](/assets/social-logos/twitter-61aaec80434c71387b8f7326e480592eae71c0a65afd051d66fce9b75a9bf417.svg "twitter")](https://twitter.com/intent/tweet?text=CircleCI+Discussions+%7C+G2&url=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2&via=G2dotcom) [![facebook](/assets/social-logos/facebook-350d0b410d6b10debcf893050e803a8633d53561aa42807b087b8daf9be3668f.svg "facebook")](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2) [![gmail](/assets/social-logos/gmail-6db42f21e7c254fae201b112bef0dd15d25223a5cbb32691ce80eab43761eadf.svg "gmail")](https://mail.google.com/mail/?view=cm&fs=1&tf=1&to=&su=CircleCI+Discussions+%7C+G2&body=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2%0aAsk+CircleCI+questions+and+get+answers+from+expert+users+in+our+CircleCI+Discussions+section.) 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Answer a few questions to help the CircleCI community [ Yes ](javascript:void(0))[ Yes ](https://www.g2.com/authorize?form=signup&return_to=https%3A%2F%2Fwww.g2.com%2Fproducts%2Fcircleci%2Fdiscuss%3Fpage%3D2%26small_ask%3Dcircleci) No ## Top Contributors in CircleCI 1 ![Michael S.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Michael S.") MS Loading... ### [Michael S.](https://www.g2.com/users/michaelcstearns "Michael S.") Vice President, Marketing 11 pts 2 ![Justin J.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Justin J.") JJ Loading... ### [Justin J.](https://www.g2.com/users/5d7a2a6c-c2b2-4516-a80a-32bae24443ac "Justin J.") Full Stack Developer 2 pts 3 ![Callum Dempsey L.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Callum Dempsey L.") 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