So to have a productive comment on all this teams shit (and slack shit too IMHO)

What is currently the best self hosted solution?

I used to habe nextcloud with only office, offering and allowing multiple users to work simultaneously on documents, next cloud itself rocked, but what about video and audio calls, what about chat? Anything out there that is integrated easily in next cloud?

We're so tightly integrated with the M$ ecosystem at my work, it's painful. My department has even been going out of it's way to self host (F)OSS alternatives where we can, just to avoid as much of the cludge as possible.

Has anyone tried out the new Teams integration feature that Mattermost recently rolled out for Enterprise customers? If so, any good?

If we can seamlessly sync calls/meetings from Teams into Mattermost and ditch the Teams client for our day-to-day comms, I might have a fighting chance at convincing my supervisor to pivot my department.