Upsun is a cloud application platform that instantly spins up production-perfect clones—live data, config, and code—on any branch across AWS, Azure, or GCP. It eliminates staging drift, accelerates signoff, and enables launching with confidence because "when it’s real, it just works." Key features include preview environments with exact copies of configuration, code, and data to minimize release risk; simplified collaboration allowing simultaneous feature development and stakeholder feedback without IT dependencies; complete observability for proactive performance issue resolution and resource optimization. Recognized by Gartner® in the 2025 Magic Quadrant™ for Cloud-Native Application Platforms. Infrastructure is reliable with 24x7 support; automates compliance (SOC 2, PCI DSS Level 1) and daily backups. Efficient development and cost control through automated provisioning and container-level CPU/RAM controls. Flexible and future-proof technology supporting multiple languages, customizable stacks site-by-site, and full CLI compatibility. Sustainability claims include Sustainable Cloud Hosting certified by B Labs™ and Greenly-verified; up to 12x more efficient CPU usage and 15x lower emissions in low-carbon regions.