@Chris Mattermost looks interesting but haven’t used it. My own team was using Keybase, but post the Zoom acquisition we moved to Microsoft Teams. We wouldn’t be using MS Teams it if there was an alternative with more privacy assurances. MS has been doing some innovative things recently however. MS Teams Family looks quite intriguing to me, but it maybe it won’t take off/be worth the effort.
"Launching initially as a preview for iOS and Android, Microsoft Teams for personal use will include the basics of text chat and video calling, combined with shared lists, documents, calendars, and location sharing. There’s even a neat dashboard of events, locations, tasks, and images that everyone in a group has shared. Microsoft is trying to take all of the best features of Microsoft Teams for work and make them relevant for when you might need them at home.
Microsoft sees the repositioning of Teams for work and life as not just offering yet another chat app to the market but something that provides ways for groups of people to get things done, like planning a vacation with friends or a family activity. “I think if all you want to do is just have a chat with someone, there are plenty of great standalone chat apps,” admits Liat Ben-Zur, a Microsoft executive working on the company’s “Modern Life” initiative, in an interview with The Verge."