Question
I would like to know about the current best advice on data migration from a Mattermost team edition instance to a discourse instance (I’m administering both).
I have already read the advice on how to coordinate the move, and therefore I am now looking for technical resources and advice on data migration.
Context
It is October 2025, and I find myself in a situation similar to this question from 2018[1]:
The pressure in my case, however, is more definite—Mattermost is effectively shutting down their team edition[2] (technically it does not, but I view the changes as a violation of their open source commitment).
The original discussion here started with a recommendation to combine both platforms, and then was closed with a statement that Discourse now has a pretty OK chat (which it does, especially with the upcoming chat search). It did not, however, contain any advice for migration.