Is Matrix a good solution for internal company communication?
Or is it better to go the way of "industry standard" like slack?
If small enough, group chats will work just fine with less struggle and overhead.
If larger, possibly.
NextCloud may do much of what you need.
I mean the team is still relatively small (around 20) plus external stakeholders.
I will look into NextCloud, thx.
A good FLOSS internal chat is Zulip, a passable one is Mattermost (who is better for many things, but being "Open Source Enterprise" is largely a no-go IMO.
Zulip+DocMost are Slack+Confluence. Zulip support calls as well, but via Jisti and they aren't much nice IMO.
Will look into Zulip, thx.