Do you mean that the other suite you mentioned provides some free-to-use cloud service?
It is not what Collabora offers, neither for free not commercially; we offer a software on-premise solution (if we talk about Collabora Online), and the demo server is just what “demo” implies: something to test, not to work with your data.
For those who do not want to manage their own server, Collabora Online is not the right tool. There are local solutions, both supported commercial (Collabora Office, also on MS Store and AppStore) and free (Collabora Office on Google Play, LibreOffice for desktops).
(Actually, this topic about “something similar” is a bit off-topic here in the “Collabora Online tiles paradigm”. It would be better if you created a separate thread, so that people who look for information about tiles were not distracted by unrelated stuff 
)