How can I tell if a particular distribution of the Discourse client is free software?

[Jagster (Jakke Lehtonen)]

People are known here the team or as a company CDCK. Of course they do, every day. Itnis under constant development. And yet that is what we are using.

This may open that question:

Is Discourse always in "beta"?

I noticed that every now and then my Discourse site send me an email telling that a new version is available to install, but every time the version is “x.y.z.beta something”, so I’d like to know: is Discourse always some “beta” version? Is it good to install in a production environment (i.e. to serve hundreds, maybe thowsands people)? Or does this concerns only free and not “cloud” versions?