I work at Tlon (the main startup behind urbit, so disclaimer) - it's a lot easier to use urbit now than it used to be thanks to free hosting.
It needs to be a lot easier still (particularly the mobile experience isn't there yet without a fully formed app), but if it's been a while it's worth checking out again: https://tlon.io/
It'll be insanely hard to actually pull off, but it's the only attempt in this space that I think has a legitimate chance of a successful outcome. The others are dead on arrival because they don't actually fix the underlying issues. (Success being widespread adoption of software the users actually own and control.)
It needs to be a lot easier still (particularly the mobile experience isn't there yet without a fully formed app), but if it's been a while it's worth checking out again: https://tlon.io/
It'll be insanely hard to actually pull off, but it's the only attempt in this space that I think has a legitimate chance of a successful outcome. The others are dead on arrival because they don't actually fix the underlying issues. (Success being widespread adoption of software the users actually own and control.)
I personally self-host mine which has also gotten a lot easier too: https://martiancomputing.substack.com/p/product-review-nativ...
The UX needs to be just as good as a centralized service - I think urbit is the only design where that's really plausible (without recentralizing).