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Bitrise is a platform, above all: you do not have to download anything to use it, you do not have to run it on your own computer or servers - we take care of all of that.

That also means you do not have to worry about infrastructure, either: maintenance, tools, virtualization are all our job and our concern.

On Bitrise, we use virtual machines (VM) to run your builds: every build runs in a new VM, and each VM is discarded immediately after the build has finished.

A stack is the type of virtual machine we can use to run your build. For example, for a native iOS app, the best stack is one of our Xcode stacks. Stacks come with all of the necessary tools pre-installed, and are regularly updated to make sure they will serve all of your needs.