In my team we've used the open source https://craig.chat/ and hooked it up to a Whisper API which lets us (1) control security of the recordings / transcripts; and (2) is ultra cheap if you sequence the transcription as bulk rather than real time.
Once we have the transcript there is then a pipeline which uses [insert your LLM of choice] and chains together prompts which (1) isolates only work-talk and then (2) produces various summaries for knowledge management / issue tracking.
Which is fine until they pick the wrong window to fire back with creative insults at their guildmates.
No respectable organization uses Discord if they are concerned with access control and encryption. Who knows, Discord might become that guy.
I'm disappointed in the availability of self-hosted alternatives for personal use right now, but businesses don't really have an excuse.