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Discord Alternatives?
(lemmy.ca)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
Since everyone is only recommending self hostable options and no hoster, here is a new candidate:
OpenTalk on tchncs.de
https://talk.tchncs.de/
It is also free and open source and the server is hosted by a german who takes donations.
The also have a mumble (like Teamspeak but as you said without screenshare) and matrix instance running, which are great but not for your needs.