A Paris-headquartered cloud application platform that automates builds, previews, and scaling for teams running PHP, Node.js, Python and other stacks.

Upsun, the company formerly known as Platform.sh, runs application infrastructure so engineering teams don’t have to manage servers directly. It spins up a fully isolated, production-like environment for every git branch, which makes it well suited to agencies and enterprises that need reliable staging and preview workflows.

The platform supports a wide range of languages and frameworks out of the box and layers on managed databases, TLS, and autoscaling. Because the legal and operational headquarters sit in Paris, customers who need EU-based accountability for their hosting vendor get that by default, even though the company also maintains regional subsidiaries abroad.

It positions itself against US PaaS incumbents by emphasizing compliance credentials and long-term platform stability for regulated or enterprise workloads.