Recently we realised that our public communication about collaboration is quite confusing ;( We mention "Cloud Services" everywhere, but the reality is that you can have an onpremise installation of our collaboration backend that you can host/control by yourself. The SAAS offer was first, that's why the current website looks how it looks. The onpremise offer is currently in a closed private-beta state, so if there is anyone willing to give it a try, we're open. We'll make it fully public in a month or two, after we polish the documentation and so on.