For maximum speed, control, security, and control, you can run the open-source buildkite agent on your own infrastructure. The agent inspects your source code and executes custom hooks, overrides, then runs your build jobs. Your source code never leaves your infrastructure. The agent can be installed using one of our binaries and packages for almost all platforms and architectures, including Ubuntu, Debian Mac, Windows, Docker and Windows. The agent's meta-data and artifact storage allow for state-free, share-nothing build jobs that can easily be distributed across multiple agents. You can run as many build agents (up to 10,000 per account), as you wish without worrying about running out of resources. Open-source Elastic CI Stack (AWS) provides an easy-to-maintain and elastically scaling CI stack for your AWS account. You can also use tools that you already know in your production environments, such as Terraform and Packer, if you prefer to roll it yourself.