@inditoot I dunno tbh. I think it might be Misskey. It handles files better, uses less dependencies and has a shiny UI, but about 95% of the documentation and discussion is in Japanese and less detailed.
The version I'm using is a bit slow, but it's the old version still using MongoDB which is a resource hog. We'll see after I migrate it to PostgreSQL (if it works now), if the performance improves.