We might have gone with Matrix if it had been a little more polished when we were looking for a replacement for XMPP. Instead we ended up with Zulip, which is v

We might have gone with Matrix if it had been a little more polished when we were looking for a replacement for XMPP. Instead we ended up with Zulip, which is very nice for an entirely in-company chat system. If you want UI polish, Zulip is still ahead. If you want federation and interoperability, Matrix is a strong contender.