FediDB + Threads
https://fedidb.org/popular-fediverse-accounts
Just added preliminary support for Threads to FediDB!
Still working with the Threads team on stats (not sure if they can provide them yet)
fedidb
The total fediverse MAU on https://fedidb.org does not include Misskey (which would give a noticeable boost)
@syuilo please consider adding MAU to Misskey!
https://github.com/misskey-dev/misskey/issues/10852#issuecomment-2274932577