Mastodon became popular in Japan after Twitter banned lolicon and Pixiv[1] decided to start its own Mastodon instance named Pawoo[2]. It had a mobile app and all[3]. Last year, Pixiv stopped supporting the mobile app and transferred the instance to Russel[4]. I haven't followed recently but it seems to be still quite active. [1] https://en.wikipedia.org/wiki/Pixiv [2] https://pawoo.net/about [3]... - Source: Hacker News / about 2 years ago

Perhaps. I am looking at https://saidit.net/, Quora, and other platforms as well. Source: 12 months ago

What's the criteria you'd need to be met for "something comparable"? Because I'd say running our own https://saidit.net/ site would be pretty identical. Source: 12 months ago

I love IRC but it serves a slightly different purpose. It isn't threaded and it sacrifices permanency for instantaneousness. In my opinion, a forums and chat rooms compliment each other. Saidit is one good Reddit alternative that implements IRC. It's based on Reddit's code but with some modifications. Every page has an embedded IRC box specific to that subcommunity. Source: about 1 year ago

For Reddit alternatives, it looks like https://saidit.net/ (https://github.com/libertysoft3/saidit) and https://phuks.co/ (https://github.com/Phuks-co/throat) could be viable alternatives. They're open source, have the UX features we desire (threaded, voting, sorting, collapsing). Source: 12 months ago

Someone already did it - it's called saidit and it works well but very few people have gone there so far. Source: 12 months ago