131 CircleCI Testimonials

“CircleCI is the hub, and the brain of our global automation.”

“The previous CI/CD tool required manual deployments.”

“We chose CircleCI primarily for its ability to automatically parallelize tests across many workers. Another primary factor is its cost structure. The cost structure enables us to optimize infrastructure costs by provisioning spot instances on Amazon Web Services, instead of on-demand or reserved instances, and we can scale our compute up and down in response to demand. CircleCI’s robust API is also a plus, and has enabled us to implement time saving features--such as automatic bisect and time travel builds--which benefit the entire development team.”

"CircleCI offers separate, clean environments, which significantly reduces CI-related problems.”

“We have to install OS-dependent libraries depending on the programming language used for a build, which requires getting root privileges for the CI tool used. It’s not a good idea to give engineers the root privileges for security reasons, so we needed to ask the CI tool administrators to install those libraries.”

"The UI is very easy to understand, it’s easy to get new engineers up and running, and CircleCI ensures everything works.”

“CircleCI has helped us automate lots of tasks, so developers only have to worry about building the product. That gives them the necessary focus to build faster and better.”

"CircleCI helped us improve build system simplicity and stability, which reduced the support requests from our teams by 90%.”

"The overall stability of CircleCI is remarkable in comparison to previously used CI providers and other cloud-based development tools.”

“CircleCI is the backbone of our software development lifecycle, since it allows us to push software faster, test things faster, and keep iterating.”

“When I give demos of Poplog and people ask, ‘How would you put that into the CI pipeline?’ I just say, ‘CircleCI.’ It’s that straightforward.”

“If your test suite takes an hour your minimum incident resolution time can’t be faster than an hour."

“With the process changes and automation improvements that CircleCI helped us introduce, we’ve gone from just one deployment every two weeks to eight deployments every day – a 64X improvement.”

“The biggest change for me was that a lot of things we used to have to do manually are now automated. We can fix things faster, and investigate faster.”

“Having flaky tests can be a major pain. Now we have data that we can quickly drill into.”