No one's said it yet, but lichess uses the new glicko system, not the old one like FIDE and
chess.com, so lichess seems inflated... but I don't think it's inflated as over time both wold show the same rating, especially for higher rated players.
I was playing at
chess.com for a couple months and two things were apparent... more than a few players are cheating and even more are rude. I was around 1400-1450, high of 1523... here i'm around 1800-1850, right now 1900. *Lichess has its share of cheaters but I rarely get the feeling someone is getting over on me, and at Lichess reimburses me points if someone gets caught.
I've also played at chess24 and that site is about as un-userfriendly as it gets, the layout just plain stinks, the options too.