Upsun is a cloud application platform solution that helps development and platform teams build, deploy, and operate web applications using standardized, Git-driven workflows. It provides managed application hosting with automated builds and deployments, preview environments for testing changes, and built-in orchestration for apps that depend on multiple services (such as databases and caches). Upsun supports common programming languages and frameworks, and is used by teams that want consistent environments across development, staging, and production while reducing day-to-day infrastructure management.