Matrix works well for me.

It’s not out yet, but I’d keep an eye on Flatline. It’s by the people who make Molly (Signal client fork—it’s pretty good, been using it for years). Flatline is a Molly-compatible server implementation, i.e. so that you can host your own Signal server. Because generally if someone asked for a “reliable messenger for family use” I’d recommend Signal as a polished and reliable option, though not self-hostable unfortunately.

A lot of legal protections for workers aren’t enforced, or are difficult to enforce due to standards of evidence and other factors. A union is a worker-controlled means of enforcement. Instead of appealing to power from above, workers can exert their own collective power from below. In other words, it’s better than having rights on paper, because the government can’t just sign a piece of paper to take them away from you or decide not to enforce the rights.