At the moment, I think Matrix is a solid contender. It's easy enough to use a public servers like matrix.org, or riot.im, or run your own. It's far from a perf

At the moment, I think Matrix is a solid contender. It's easy enough to use a public servers like matrix.org, or riot.im, or run your own. It's far from a perfect solution, but I feel like it comes closer to the mark than Signal.