Download websites that use Platform.sh

Hosting is the part of a technology stack that a site owner rarely chooses alone. Platform.sh sits in the PaaS layer, which means the decision to use it was usually taken by a development team or an agency during a build, then inherited by whoever owns the site afterwards. Recognizing the platform on a domain therefore says less about that company's taste in software and more about how the site is maintained.

What Platform.sh implies specifically is a Git driven deployment process. In service since 2014 and operated today by Upsun, the product builds an application from a repository and gives every branch its own running copy of production, so a site running on it is very likely maintained by people who work in branches, review changes and deploy on a schedule rather than editing files on a server. Sites arrive on that kind of platform through Symfony and Drupal work, Magento projects and framework applications that need a build step. A hand assembled brochure site does not end up there.

Because the license is Proprietary and billing is per project and environment, every detection is a paying customer of a named company rather than a free download. Sales teams at competing platforms read the list that way. So do people selling anything that plugs into a professional delivery pipeline, from monitoring and error tracking to continuous integration add ons and CMS support retainers, because the audience has already shown it will pay for infrastructure and has someone on staff who can install things.

As of October 2026 we detect Platform.sh on 5,655 sites. The figure should be read as a floor rather than a census. Platform level hosting has no version string in the page and no required client side asset, so detection leans on response headers, hostnames and redirect behavior, all of which a CDN in front of the origin can mask. Sites that terminate traffic elsewhere will be missing from the list even when the application behind them is hosted here, and no version or release data is available for the same reason.

A per domain lookup answers whether one company uses the platform. The downloadable list answers the questions that only exist in aggregate. Which CMS platforms cluster on it, how the population compares with Pantheon, Acquia or a self managed cloud footprint, which segments of a target market have already moved to managed hosting and which have not, and how that population changes between refreshes. Cross referencing the domain list against a CRM or a prospect file turns it into a segmentation input, and running the same query on a later export turns it into a churn and growth signal that no single lookup can produce.