Translations:Instance:Fedi.at/10/en

As of December '22 fedi.at runs Mastodon v4.0.2.
It uses managed hosting by toot.io - to be exact the "Friends & Family" Plan for 59€/month (payed yearly, which is 590€/year).
Toot.io only offers vanilla Mastodon without any tweaks, so the character limit is 500 and other limits are default too.