From what I understand, it’s a fork of kbin. when kbin dev went silent and didn’t trust anybody else to help them, a few other devs forked it.

Thunder. I used to use Sync for reddit before, and used it a bit for Lemmy. But I like thunder a bit more.

I also use Interstellar for mbin.

I wonder if this forum comparison to make people join lemmy/mbin/piefed is a better story to tell than the email comparison? Because that’s what made me realize I am fine being in the threadiverse instead of the email comparison. Lemmy is a bunch of forum sites than can talk with each other.