500px has been our customer since 2014, and they have been growing and evolving along with Semaphore.
Moving fast is crucial to the 500px team. The less time they spend on testing, the more value they can create for their users. They put new code into production several times per day, and automated testing allows them to ensure that new features work, while spending less time reviewing previously-tested functionality. In order to accomplish this, they rely on Semaphore to automatically run their tests in parallel and speed up their test suite.