Download websites that use Open-Xchange App Suite

About Open-Xchange App Suite

Count the sites and you will badly misjudge the reach of this one. A single detected hostname can be the webmail door for an entire telephone company's subscriber base, or for every mailbox a hosting provider sells, which makes a site count an unusually poor proxy for how many people use the software. Open-Xchange App Suite is sold to service providers rather than to site owners, and that changes almost everything about how the fingerprint should be read.

The product is a browser-based mail and collaboration suite, published by Open-Xchange GmbH under GPL v2 since 2005 and written in Java, and the deployment pattern follows from the licence. A carrier that wants to run mail for its own customers, on its own infrastructure, under its own brand, needs source it can audit and a supplier relationship that does not place subscriber mail inside somebody else's advertising business. Open source groupware with a commercial support contract is the standard answer to that requirement, which is why the installations we find sit on operator domains, university systems and regional hosting brands rather than on marketing sites.

Our catalogue files the entry under Email, a poor fit inherited from how detection is organised rather than a claim about the product. Nothing here manages a public website. What we recognise is the login screen and the application shell, usually served from a mail or webmail subdomain, and a crawl sees that page whether the deployment serves a hundred mailboxes or several million. Behind the login we see nothing at all, which is as it should be, and it also means the tally counts doors rather than users.

As of October 2026 the figure stands at 46 sites, and the interesting research question is whose doors those are. White label deployments hide the vendor from the end user by design, so a subscriber has no idea which software delivers their mail, and neither does anyone studying the market from outside. A fingerprint that survives the rebranding is the only practical way to draw that map.

For a commercial researcher the resulting population is unusually well qualified. Every entry is an organisation that took on the operational burden of running mail at scale, which implies budget, an infrastructure team, storage and anti-abuse spending, migration projects as versions age, and a settled aversion to handing consumer mailboxes to the large hosted platforms. Anyone selling filtering, deliverability, encryption, storage, calendar integrations or migration services can read the list as an account list. A per-domain lookup cannot produce it, because the real question is not whether one hostname runs the suite, but which operators in a given country still run mail themselves at all.